Robotics Machining Parts: What We Make and How to Specify Them
Contents
- The Parts That Are Almost Always Machined
- Gripper Fingers and EOAT Plates
- Wrist Flanges and Mounting Interfaces
- Sensor and Camera Brackets
- Structural Members and Spacers
- Specifying Robotics Machining Parts
- One Piece or Five Hundred
A working list of robotics machining parts - gripper fingers, EOAT plates, wrist flanges, sensor brackets and structural members - with the tolerances and finishes that suit each.
The Parts That Are Almost Always Machined
Robotics machining parts fall into a recognisable set: end-of-arm tooling components, mounting interfaces, sensor and camera brackets, and structural members that connect them. They share three properties that make machining the practical route rather than a preference - low volume, a tight interface to somebody else equipment, and a design that changes between revisions. Machining from solid stock absorbs all three without tooling.
Gripper Fingers and EOAT Plates
Gripper fingers carry the highest tolerance on most cells because parallel gripping surfaces control repeatability. A parallelism callout of 0.02-0.05 mm is typical, referenced to the jaw datum face rather than a simple jaw-width dimension. EOAT adapter plates are usually the opposite problem: less tight on any single feature, but they must match a robot flange pattern and stay flat and light. Both are commonly machined from 7075-T6, hard anodized where wear resistance matters.
Wrist Flanges and Mounting Interfaces
Where a part mates with a robot flange or a tool changer, the interface pattern decides whether the tool sits square and whether it can be removed and refitted without shimming. These patterns are best machined in the same setup as the reference face, and verified on a CMM before the batch proceeds. Where bolts will be cycled repeatedly, thread inserts protect the aluminium threads.
Sensor and Camera Brackets
Sensor brackets and machine vision camera mounts usually carry one or two critical features - an optical bore, a locating pin pattern, a face that sets height - and moderate tolerances everywhere else. The finish matters: black anodizing reduces stray light into the lens, and bead blasting before anodizing gives a uniform matte surface. See the machine vision parts page for the full specification checklist.
Structural Members and Spacers
Frames, standoffs, spacers and bushings are the parts nobody wants to spend engineering time on, and they are usually what delays an assembly. They are also the easiest to specify well: general tolerances, a sensible material, and a note about whether the part is seen or hidden. Sending them with the rest of the cell gives one coordinated delivery instead of three shipments.
Specifying Robotics Machining Parts
Send the STEP model with a PDF drawing that identifies datums, the critical features, material and temper, finish and its thickness, and the inspection level you expect. Where a feature has to fit after coating, say so - anodizing grows the surface by roughly 0.01-0.03 mm per face. That note changes the CAM program, so it has to be on the drawing rather than discovered at final inspection.
One Piece or Five Hundred
There is no minimum order quantity. A single prototype gripper finger and a 500-piece repeat batch run through the same process and the same inspection level. Quotes come back within one business day, and typical batches ship in 5-10 working days depending on finishing and documentation.
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