Custom EOAT Components

Custom CNC Machined Robot End Effector Components

The parts at the end of a robot arm have to fit the wrist, hold the workpiece and stay light. This page explains how we plan and check those things from your drawing. It also says clearly what we do not claim.

What this page answers
Group of custom CNC machined robot end effector parts with aluminum gripper fingers, a black wrist adapter plate, a vacuum manifold block and white POM pads

At a glance

Product scopeMachined EOAT parts, made to drawing
Input2D drawing, 3D model or a sample part
Key featuresBolt circles, dowel holes, contact faces
Common materials6061-T6, 7075-T6, stainless, POM, PEEK
Main processesMilling, turning, drilling, tapping
Precision basisKey sizes set from your drawing
Order stageOne sample to repeat batches
RecordsDimensional report as agreed
Direct answer

Custom CNC machined robot end effector components are the mechanical parts that mount to a robot wrist and hold, move or sense a workpiece. We make them from your drawing with milling, turning, drilling and tapping. The features that decide whether the tool works are the wrist interface, the contact geometry, the air passages, the weight and the fit of matched parts. We agree each one in writing before we quote. We do not sell a complete end effector, and we do not design the automation cell around it.

What We Make, and What We Do Not

We make the machined parts. We do not make the gripper actuator, the vacuum pump, the robot program or the safety system for the cell. Your drawing is the control document. We plan the cut around the part, not around a catalogue number. Each part is made to order.

This page covers one part family. Our CNC machining for robotics parts page covers robot arms, joint housings and the wider component range. Our sensor mounts page covers a different group of parts. Those pages answer different buying needs.

Where we draw the line

  • We do not sell a standard catalogue of end effectors, grippers or quick change systems.
  • We do not claim to design a complete tool, to write robot code or to validate a full automation cell.
  • We do not claim that our parts replace a named robot maker part, or that they carry a robot system approval.
  • We do not print a payload class, a fixed lead time, a blanket tolerance or a fixed weight saving on this page.
  • We do confirm the interface, the material, the critical sizes, the check method and the record format in writing before a price is issued.
Why this matters to a buyer. A part supplier and a system integrator carry different duties. When you buy machined parts from us, you keep control of the tool design. We take care of the cut, the fit and the agreed checks. This split is clearer for both sides, and it keeps the quote honest.

What Buyers Check First

A buyer does not start with a machine list. They start with the interface. If the bolt circle is wrong, a well made plate still will not mount. If the contact face is wrong, a well made finger still drops the part. The table below is the list we work through at enquiry. It is also the list we answer in writing before a price goes out.

Decision factorWhat we agree at enquiry
Robot wrist interfaceMaker, model, bolt circle, center bore, dowel holes
Tool side layoutPlate thickness, fastener access, cable and hose space
WorkpieceSize, mass, shape, surface and how it is held
Gripping methodMechanical fingers, soft jaws, vacuum or a mixed tool
Contact geometryFlat, stepped, curved or padded contact face
Paired partsWhether jaws are made and checked as one set
Critical sizesDatums, pin holes, sealing faces, pad seats
Material and finishGrade, surface step, masked areas, re-check after treatment
Inspection recordWhich sizes, which gauge, which report format
Order patternOne sample, small batch or repeat supply

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Three items cause most first order problems. A robot model named without the tool side drawing. A workpiece weight left out of the enquiry. A surface treatment agreed after the final sizes were set. We ask for all three early, because each one changes the cut plan.

Six EOAT Part Families We Machine

These six groups cover most of the drawing based work we see. Each one changes which sizes matter most. An adapter plate needs a true bolt circle. A finger needs the right contact face. A manifold needs clean internal passages. A tooling plate needs a stable datum grid.

Part familyWhat it doesWhat we check first
Gripper fingers and jaw platesTouch and hold the workpieceContact face, pad seat, hole pattern, jaw travel
Robot wrist adapter platesJoin the robot flange to the toolBolt circle, center bore, dowel holes, flat face
Gripper bodies and housingsCarry the fingers and the moving partsBore alignment, wall thickness, port positions
Vacuum manifold blocksSend air to cups or padsPort threads, seal faces, cross holes, burrs
Tooling plates and nestsLocate the workpiece or the toolDatum grid, pin holes, pocket shape, flatness
Sensor, camera and changer partsHold devices or join two tool halvesCable clearance, pocket depth, stack height

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Other shapes in the same family include suction cup mount blocks, locating pins, support blocks, cable brackets, light weight frames and replacement jaw pads. The list describes machining needs. We do not hold these parts in stock. We do not publish customer project names or case studies on this page.

One limit is worth stating. A quick change system has two halves, a locking unit and a set of service ports. We can machine the plates and the mount blocks to your drawing. Machining a plate does not make our part a complete quick change unit. Ask us to quote the full set of machined parts if that is what you need.

The Robot Wrist Interface

The wrist is where the tool starts. Most industrial robots use a round flange with a bolt circle, a center bore and dowel holes. The center bore locates the tool. The dowel holes stop the tool from turning. The bolt circle holds it in place. A small error in one of these three can put the whole tool out of line.

ISO 9409-1 describes a common circular mechanical interface for robot wrists. We can machine a plate to a drawing that names this standard. We still need the real bolt circle, the bore size, the dowel size and the tool side layout. We do not assume a robot size or a payload class from a standard name. We do not certify a robot system. Your drawing stays the control document.

precision robot wrist adapter plate with dowel holes
A round tool side plate with a bolt circle, a center bore and dowel holes. Representative geometry, not a delivered customer part.
Interface itemWhy it matters
Bolt circle and hole sizeSets whether the plate mounts at all
Center boreCenters the tool on the wrist axis
Dowel holesSet the angle of the tool after each change
Mounting face flatnessKeeps the tool from rocking under load
Plate thicknessChanges tool length, reach and bolt length
Fastener accessDecides if a wrench can reach every bolt
Tool side hole gridControls where grippers, sensors and hoses sit
Edge clearanceKeeps the plate clear of the arm during a move

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Send the tool side interface drawing with the robot maker and model. If a mating part exists, send its drawing too. We then check the hole positions against one datum. We also check the plate thickness against the bolt length. A plate can be flat and still fail if the fastener cannot reach the thread.

Gripper Fingers and Contact Geometry

A gripper finger is a small part with a hard job. It must hold the workpiece in the same place every cycle. It must not mark a finished surface. It must also clear the fixture when the jaws open. The contact face does most of that work. Its shape comes from the workpiece, not from a standard finger size.

CNC machined aluminum robotic gripper fingers
A matched pair of machined fingers with stepped contact faces and replaceable pads. Representative geometry, not a delivered customer part.
Contact shapeWhere it is usedWhat we check
Flat faceSquare or flat sided partsFace flatness and parallel alignment
Stepped faceParts with a shoulder or a flangeStep height and seat position
V grooveRound shafts and tubesGroove angle and center line
Curved faceRound or shaped workpiecesProfile against the 3D model
Soft pad seatFinished or easy to mark surfacesPad pocket depth and pad fit
Serrated faceRough cast or oily partsTooth form and edge breaks

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We ask four questions before cutting a finger. What does the workpiece weigh? Which surface may be touched? How far do the jaws travel? Where is the fixture when the jaws open? The answers set the finger length, the pad material and the corner radii. Small radii also stop sharp edges from cutting a glove or a soft part.

Drawing detail
Contact face named only as "hold part"
What we need
Workpiece shape, grip points and allowed contact area
Drawing detail
Pad material left open
What we need
Pad grade, pad thickness and how it is fixed

Matched Jaw Sets and Repeat Fit

Two fingers that work together are one assembly, not two separate orders. If the left jaw and the right jaw are cut against different datums, the pair can meet at an angle. The workpiece then sits off center. We plan a matched set against one datum and inspect the pair as a set.

Set featureHow we control itWhat the record can show
Mounting hole patternOne setup or one shared datum for both jawsHole positions against the same datum
Contact face heightCut both faces in one planned stepHeight of each face to the base
Pad seat depthSame tool and same offset for both jawsSeat depth on left and right jaw
Closed gapCheck the pair together on a gaugeGap at the agreed close position
Replacement setsKeep the revision and setup notesSet number and drawing revision

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Repeat orders need the same control. If you plan to order a second set next year, tell us at the first enquiry. We keep the drawing revision, the fixture notes and the check plan under one order reference. That makes the next set comparable. It does not mean we hold finished jaws in stock.

About replacement jaws. Send the mating jaw or its drawing when you order a single spare. A spare cut without the pair can look correct on its own and still close out of line. We prefer to check the pair, even when only one part is ordered.

Vacuum Manifolds and Air Passages

A vacuum manifold block feeds air from one inlet to several cups or pads. The outside of the block is easy. The inside is the hard part. Cross drilled holes must meet. Threads must seal. Seal faces must be flat. Loose burrs must not stay inside a passage, because they can reach a valve or a cup later.

CNC machined vacuum manifold block for EOAT
Machined manifold blocks with threaded ports and open cross drilled passages. Representative geometry, not a delivered customer part.
FeatureMachining riskControl we plan
Port threadsWrong form or a shallow threadNamed standard, gauge and thread depth
O-ring grooveSeal sits too high or too lowGroove width, depth and surface
Cross drilled passageHoles miss each other insideDrill order, depth and intersection check
Plug positionPlug blocks a side passagePlug depth marked on the drawing
Internal burrsBurr breaks loose in serviceDeburr access and flush cleaning step
Sealing faceLeak at the mating faceFlat face, edge break, no tool marks across the seal
Mounting holesBlock sits out of line on the toolOne datum for ports and holes

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We ask for the thread standard and the gauge on the drawing. We also ask where each passage ends and which ports are plugged. If you need a leak test, tell us at enquiry. A test needs a method, a pressure and an acceptance rule. We do not add a test result to a quote that has no test defined.

What a machined block does not include

  • Not included: valves, pumps, cups, hoses and the vacuum control unit.
  • Not included: a system level leak or safety approval for the finished tool.
  • Not assumed: a working vacuum level from the grade of aluminum.
  • Included when agreed: a dimensional report on the named ports, grooves and faces.

Tooling Plates, Nests and Supports

A tooling plate gives the tool a stable base. A nest gives the workpiece a known place to sit. Both parts depend on a clear datum scheme. We see two common problems. The hole grid has no datum. Or a pocket is dimensioned from a face that is machined later. Both make the assembly hard to repeat.

POM non-marring workpiece locating nests on an EOAT tooling plate
Soft polymer nests on a machined base plate with a dowel hole grid. Representative geometry, not a delivered customer part.
Datum grid

One reference for all holes

We ask for two datums and one origin. Pin holes, nest pockets and sensor mounts are then cut from the same reference. A grid without an origin is only a pattern.

Pocket shape

Fit the real workpiece

A nest pocket follows the part shape and the allowed contact area. We review draft, corner radii and how the part is released. A tight pocket can trap the part.

Soft contact

Protect finished surfaces

POM and UHMW-PE are used for non marking nests and pads. We agree the grade and check how it is fixed. A soft pad that moves gives the same problem as no pad.

Plate flatness

Keep the stack true

A thin plate can bow after pocketing. We plan the cut order, the fixture support and the final skim pass. We check the mating face after the last step.

Nests, pins, support blocks and stop blocks are often ordered as one set. Send the assembly drawing when you have it. We then plan which parts are cut together and which sizes are checked together. That is cheaper than finding a mismatch after every part is finished.

Sensor, Camera and Tool Changer Parts

Modern tools carry sensors, cameras and small devices near the workpiece. Their mounts are small, but they set the view of the sensor. A bracket that is a little twisted can point a camera away from the part. A pocket that is too shallow can pinch a cable. We cut these parts against the tool datum, not against an outside edge.

PartWhat buyers needWhat we plan
Sensor bracketFixed angle and cable exitDatum face, slot length, cable radius
Camera mountStable view after a tool changeDowel location, flat seat, stack height
Light bracketRoom for wires and heatPocket depth, clearance, edge breaks
Tool changer plateSame stack height on both halvesOne datum for both plates, pin fit
Cable guideNo sharp bend or rub pointRadii, channel width, smooth finish
Protective coverClear of moving partsThin wall plan, fixing holes, access

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We do not supply the sensor, the camera or the locking unit. We make the machined parts that hold them. If you send the device drawing, we check the fixing holes and the connector space. Small parts are easy to make and easy to get wrong, so we agree the datum before the first cut.

Tool Weight, Center of Gravity and Inertia

Everything on the wrist adds load. A heavy tool can slow a move, change the stop position or push a small robot past its rated load. Weight is not only about mass. A long tool with the mass far from the wrist has a larger effect than a short tool of the same mass. This is why we ask for the workpiece weight and the tool layout early.

  • Send the mass target. Tell us the allowed tool mass and the allowed reach from the wrist.Input
  • Review the load path. We look at where the grip force goes and which walls carry it.Review
  • Plan pockets. We remove material from low load areas, not from the bolt circle or the contact face.Cut plan
  • Keep ribs where needed. A thin flat plate can bend. A small rib often saves more than a thick plate.Shape
  • Check the fixture. A light part needs good support while it is cut, or it can move under the tool.Setup
  • Agree the check. We note the final mass on the record if the order asks for it.Record
  • We do not print a fixed weight saving. We do not set a robot payload class. Those numbers come from the robot maker and from your tool design. Our job is to cut the shape you approve and to keep the walls and the mating faces sound. If we see a wall that looks too thin, we raise it before the quote.

    Materials for EOAT Parts

    Material choice follows the job of the part. A plate needs stiffness. A finger needs wear resistance at the contact face. A nest needs a soft surface. A washdown tool needs a grade that suits the cleaning agent. We confirm the grade and the supply papers for the lot before we order material.

    MaterialWhere it fitsPoint to agree
    6061-T6 aluminumAdapter plates, tooling plates, light bracketsCommon grade, good machining, anodizing option
    7075-T6 aluminumFingers and plates that need more strengthGrade supply and the surface step
    304 / 316L stainless steelWet areas, washdown tools, wear partsGrade, passivation and the medium it sees
    POMSoft jaws, nests, non marking padsGrade, heat state, measurement conditions
    UHMW-PELow friction pads and support blocksFixing method and how the part is held
    PEEKHot areas and clean contact partsGrade, supply papers, tool wear and cost

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    Plastics need a little more care than metal. They move with heat and some take in water. A size measured right after machining can change later. We agree the material state and the measurement conditions with you. We also use sharp tools and a controlled chip load, so the surface stays clean.

    For wider material background, see our materials hub, the engineering plastic machining page and the stainless steel machining page. Those pages do not replace the drawing for your part.

    CNC Routes and Setups

    Most EOAT parts start as a plate, a bar or a block. We mill the outside, drill and tap the holes, cut the pockets and break the edges. Round parts go on a lathe. The route is chosen from the shape, not from a fixed machine list.

    3-axis milling

    Flat plates and simple pockets

    Good for adapter plates, tooling plates and brackets with features on one or two faces. We plan the order of the cuts so the plate stays flat.

    4-axis work

    Features around a part

    Useful when ports or holes sit on several sides of a block. One setup keeps the hole positions tied to the same datum.

    5-axis work

    Fewer re-clamps

    Useful for angled faces, curved contact geometry and deep cavities. It saves setups. It does not make every EOAT part better.

    Turning and tapping

    Round parts and threads

    Round mounts, pins and port bosses are turned. Threads are cut or tapped to the standard named on your drawing.

    A 5-axis machine is not a selling point on its own. It helps when one setup can hold the datums that would otherwise be lost. For a flat plate with a bolt circle, a 3-axis cut is often the cleaner plan. We choose the route after we see the drawing. See our 5-axis CNC machining and CNC milling services pages for the wider process background.

    Every route ends with deburring and edge breaks. A sharp edge on a finger can cut a workpiece or a glove. A burr in a manifold can travel into a valve. We plan access for these steps before the block is cut, not after it is finished.

    Drawing Review: What Changes the Cut Plan

    A drawing review is not a sales step. It is where we find the features that will be hard to hold. We send questions, not a price, when a datum is missing or a wall is too thin. The list below is the order we follow.

  • Read the datums. We find the faces and holes that all other sizes come from.Step 01
  • Mark the critical features. Bolt circles, pin holes, seal faces and contact faces come first.Step 02
  • Check the material and the blank. We confirm the grade, the size and the supply papers.Step 03
  • Plan the setups. We keep related features in one clamp where we can.Step 04
  • Plan the tool access. We check deep pockets, small radii, internal corners and plug holes.Step 05
  • Agree the surface step. Anodizing and passivation can change a fit. We note the re-check.Step 06
  • Write the inspection plan. We name the sizes, the gauge and the record format.Step 07
  • Can you quote from a 3D model alone?

    We can start a review from a STEP or IGES model. A price needs the 2D drawing too. The model shows shape. The drawing shows the tolerances, the datums, the thread standard and the surface step. Without those, two shops can quote two different parts.

    Related: RFQ checklist

    What if we have no drawing yet?

    Send a photo of the old part, the mating part and the workpiece. Add the robot model and the wrist details. We can give a first view on the shape and the likely cut plan. We do not issue a final price from a photo.

    Related: robot wrist interface

    Datums, GD&T and Critical Features

    Not every size on a drawing needs the same care. The sizes that control fit, sealing and alignment do. We call these critical features. We agree them in writing before the first cut, along with the datum they belong to and the way they will be measured.

    FeatureTypical datumCheck we can plan
    Bolt circle positionCenter bore and mounting faceHole position to the bore axis
    Dowel hole fitMounting faceHole size and pin gauge
    Mounting face flatnessThe face itselfFlatness check on the agreed surface
    Jaw contact face heightJaw base and one side faceHeight of both jaws from one datum
    Pad seat depthContact faceDepth and pad fit
    Manifold seal facePort axisFace flatness and surface condition
    Nest pocket positionPlate datum gridPocket position to two datums
    Tool changer stack heightMounting faceHeight of both plates as a pair

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    If a drawing uses GD&T, send the datum scheme with it. A position callout without a datum is hard to check. We do not replace a callout with a general tolerance note. We ask for the missing datum, then plan the measurement. This is also where we decide which features need a CMM check and which need a simple gauge.

    Why we do not print one tolerance number. A pin hole, a seal face and a contact face fail in different ways. One number on a web page cannot describe all three. Your drawing and the written check plan are what we work to. See our precision CNC machining page for the wider process background.

    Inspection and Records

    Inspection should match the risk of the part. A wrist adapter plate needs its bolt circle and bore checked. A matched jaw set needs the pair checked together. A manifold needs its threads and seal faces checked. We agree the list of sizes before the first cut, so the record matches what the drawing calls critical.

    CMM inspection of CNC machined robot tooling plate
    A probe checks a dowel hole on a machined tooling plate. Representative process photo, not a customer inspection report.
    Dimensional report

    Sizes on the agreed list

    We record the named critical sizes. Ask for the report format at enquiry so the file fits your system.

    First article

    One part before a batch

    Useful when a new tool goes into repeat supply. We agree the sample, the report and the hold point first.

    CMM check

    For position and profile

    Planned for the features that need it. We do not say that every feature on every part gets a CMM check.

    Material papers

    For the lot we buy

    Available when the order names them. We confirm the grade and the papers before material is ordered.

    We do not publish customer reports, named equipment brands or process capability numbers on this page. A report belongs to the order that produced it. If you need a first article, a material paper or a special gauge, put it in the enquiry. We then build the step into the plan and the price.

    Finishes, Edge Breaks and Cleaning

    A surface step can change a fit. Anodizing adds a thin layer. Passivation can change a bore by a small amount. A coating can fill a pad seat. We agree the treatment, the masked areas and the re-check before we cut. This matters most on dowel holes, pin fits and sealing faces.

    FinishWhy buyers ask for itWhat we agree first
    Clear or black anodizingWear, look and a stable surfaceType, color, masked holes, re-check after treatment
    Hard anodizingMore wear on contact partsLayer effect on pin fits and pad seats
    PassivationClean stainless surfacesGrade, method and post treatment sizes
    Bead blastEven, low glare surfaceWhich faces are blasted and which are masked
    Edge breaksSafe handling and no cut glovesRadius or chamfer size on the drawing
    Internal cleaningClean air passagesFlush access, drying and plug plan

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    Deburring is a planned step, not a promise that a part has no burrs anywhere. We give internal passages a way to be reached and flushed. We break edges where a hand or a soft workpiece can touch them. If your order needs a written cleanliness rule, send it with the drawing.

    From One Sample to Repeat Orders

    Most EOAT work starts small. One sample lets you check the fit on the real wrist. A small batch then proves the process. Repeat orders come after the tool is in service. We keep the same drawing revision, the same setup notes and the same check plan under one order reference.

    Sample

    Check the fit first

    One part shows whether the interface, the contact face and the stack height work on the tool.

    Small batch

    Prove the setup

    We check that the fixture, the tool path and the inspection plan hold across more than one part.

    Repeat supply

    Keep the revision

    We work to the revision named on the order. A change to the model starts a new review.

    We do not print a fixed lead time here. The schedule depends on the drawing, the material supply, the surface step and the quantity. We agree dates after the review. We also do not claim a fixed cost reduction from a repeat order. A repeat setup is faster, but the price still follows the work in the drawing.

    Drawing Confidentiality and Revision Control

    EOAT drawings often show a customer tool design. We treat those files as customer information. Files are shared inside the engineering and production team for the order. An NDA can be arranged before files are exchanged. Ask for it at enquiry if your process needs one.

    How we handle a revision

    • Name the revision. Put the letter or number on the drawing and in the file name.
    • List the change. Tell us which features moved, so the old setup is not reused by mistake.
    • Confirm the effect. A moved dowel hole can change the fixture, the gauge and the report.
    • Freeze before cutting. We work to the revision named on the order, not to a newer file sent by email.

    We do not claim a certified data security system on this page. We do describe a simple working rule: one named revision, one order reference, one check plan. That rule prevents the most common repeat order error, which is a good part made to an old drawing.

    What We Need for a Quote

    The more the drawing tells us about the tool, the less we have to guess. You do not need a finished system design to ask for a price. Start with the robot interface, the workpiece and the parts you want machined. We can review the rest together.

    ItemWhat to send
    2D drawingSizes, tolerances, GD&T and the datum scheme
    3D modelSTEP, STP or IGES
    Robot maker and modelThe exact machine the tool will mount on
    Wrist interfaceFlange standard, bolt circle, bore and tool side drawing
    WorkpieceSize, mass, shape and surface that may be touched
    Gripping methodMechanical, vacuum or a mixed tool
    MaterialGrade, product form and any supply papers needed
    Critical featuresPin holes, seal faces, contact faces and pad seats
    Working conditionsCycle rate, temperature, dust, coolant and cleaning agents
    FinishAnodizing, passivation, masking and re-check needs
    InspectionGauges, CMM, first article and report format
    QuantitySample, small batch and repeat volume

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    For EOAT projects, please provide the robot model, tool side interface drawing, workpiece weight and geometry, gripping method and critical dimensional requirements whenever available. If some of that is missing, send what you have. A sample part, the wrist drawing and a photo of the workpiece are enough for a first review.

    About the photographs on this page. They show representative geometry and process steps. They are not delivered customer projects, not named end user parts and not inspection reports. We do not publish unverified case studies. Ask for a sample or a drawing review instead.

    Questions Buyers Ask Before an RFQ

    Who makes custom EOAT parts for automation builders?

    A shop that works from your drawing and the wrist interface, not a catalogue. Send the 2D drawing, the 3D model and the workpiece details. We review the holes, the contact faces, the material and the check plan. Then we quote a cut plan we can hold.

    Related: scope and limits

    Can a CNC shop supply a complete end effector?

    Not from machining alone. A complete tool needs actuators, sensors, air control, wiring and a safety review. We make the machined mechanical parts. Your team or your integrator keeps the tool design and the system duties.

    Related: six part families

    Why do you ask for the robot model before quoting a plate?

    Because the wrist interface is not the same on every robot. The bolt circle, the center bore and the dowel holes set the plate. A plate made to a generic round pattern will not mount. The model and the tool side drawing remove that risk.

    Related: robot wrist interface

    Which documents should I ask an EOAT parts supplier for?

    Ask for a dimensional report on the critical sizes, thread gauge results, material papers for the lot and a first article report if the order needs one. Agree the format before the first cut. A material paper is not a system approval.

    Related: inspection and records

    Frequently Asked Questions

    What are CNC machined robot end effector components?

    They are the metal and plastic parts fixed to the wrist of a robot. Gripper fingers, jaw plates, adapter plates, tooling plates, vacuum manifold blocks, nests, brackets and sensor mounts are common examples. We make them from your drawing with CNC milling, turning, drilling and tapping. We do not supply the complete end effector. We do not build the air control system or the robot program. Each part is planned around its own fit, contact face and inspection need.

    Can you make custom robot gripper fingers?

    Yes. Send the 2D drawing and the 3D model. We need the shape of the workpiece, the contact face, the mounting hole pattern and the jaw travel. We review the material, the wall thickness and the pad seat before we quote. If the fingers must work as a matched pair, we plan them as one set. We can also make replaceable contact pads. We agree the datum and the check method in writing first.

    Can you make robot wrist adapter plates?

    Yes, when you send the tool-side interface drawing. An adapter plate needs the bolt circle, the center bore, the dowel holes and a flat mounting face. We ask for the robot maker, the model and the tool side drawing. We check the plate thickness and the fastener access. We do not infer a payload class from a plate drawing. We do not claim that our part replaces a named robot maker part.

    Which materials work best for EOAT parts?

    There is no single best material. 6061-T6 aluminum suits many light plates and fingers. 7075-T6 suits parts that need more strength. 304 and 316L stainless steel suit wet or washdown areas. POM and UHMW-PE suit soft contact faces that must not mark the workpiece. PEEK suits parts that need heat resistance. We confirm the grade and the supply papers for the lot before we order material.

    Can you machine lightweight gripper parts?

    Yes. We mill pockets, thin walls and ribs where the drawing allows them. Weight is not the only target. A thin wall can bend under grip force. We review the shape, the load path and the fixture support with your engineer. We do not print a fixed weight saving number. If you have a target mass, send it with the model. We check the stiffness before we agree to a cut plan.

    Do you support ISO 9409-1 robot interface plates?

    ISO 9409-1 describes a common circular mechanical interface at the robot wrist. We can machine a plate to a drawing that names this interface. We still need the bolt circle, the center bore, the dowel holes and the tool side details. We do not assume a robot size or a payload class from the standard name. We do not certify a complete robot system. Your drawing stays the control document.

    Can you machine vacuum manifold blocks?

    Yes. We mill the block, drill the air passages, cut the port threads and machine the seal faces. Cross holes must meet inside the part without loose burrs. We plan the plug positions and the access for cleaning. We check the threads with the gauge named on your drawing. A leak test is only planned when your order defines the method, the pressure and the acceptance rule.

    What tolerances can you hold on EOAT parts?

    Key sizes follow your drawing. We do not print one blanket number for every bore, pin hole and contact face. A tight feature is reviewed before we accept it. We agree the feature, the datum and the measurement method in writing before we quote. That is more useful than a single number on a web page. We also note which sizes can change after anodizing or another surface step.

    How do you inspect matched gripper fingers?

    We check the pair together. The contact faces, the pad seats and the pin holes must line up when the jaws close. We set one datum for both parts. We can plan a dimensional report, a first article inspection and a CMM check on the agreed features. Tell us what the record must show before the first cut. We do not say that every feature on every part gets a CMM check.

    Can you machine POM or PEEK gripper jaws?

    Yes, when the drawing calls for the grade. POM and PEEK are used where a soft, clean contact face is needed. They move with heat and can take in water, so we agree the material state and the measurement conditions. We use sharp tools and control the chip load. We confirm the grade and the supply papers for the lot. Tell us if the part touches a food or medical surface.

    Can you support prototypes and repeat batches?

    Yes. We can start with one sample part, then move to a small batch and to repeat orders. The first sample is a chance to check the fit before more parts are cut. We keep the drawing revision, the setup notes and the inspection plan under one order reference. We do not print a fixed lead time here. We agree the schedule after we see the drawing, the material and the quantity.

    What do you need for an EOAT quote?

    Send the 2D drawing and the 3D model. Add the robot maker and model, the tool side interface drawing, the workpiece size and weight, the gripping method and the material. Mark the critical features and the quantity. Add the working conditions, the finish and the inspection record you need. If you have no drawing yet, send a sample part and the mating details. We start with a drawing review.

    This page covers one part family. The pages below cover the wider process, material and precision background.

    Discuss Your Custom EOAT Project

    Send the 2D drawing, 3D model, robot wrist interface, workpiece details, material and critical features. Our engineers review the holes, the contact faces, the air passages, the weight and the inspection plan. Then we quote a process we can hold.

    Drawings are handled under our standard confidentiality procedure. An NDA can be arranged before files are exchanged.

    Xiamen Goldcattle Plastic & Metal Products Co., Ltd. · Founded in 1998 ISO 9001:2015 quality system Customers in 100+ countries Prototype quantities from 1 piece

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