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Application

Automation Fixtures & Tooling

Precision CNC machined jig plates, fixture inserts, clamp bases and locating pins for assembly lines, robotic workcells and production tooling. Aluminum, steel, ±0.005mm.

🔥 Fast track · 1-3 monthsAluminum 6061Steel±0.005mmCMM Report

Typical Parts We Machine

  • Jig plates and fixture bases — drilled, tapped, doweled
  • Fixture inserts and locators — hardened, ground, repeatable
  • Clamp bases and mounting blocks — multi-axis machining
  • Locating pins and bushings — precision ground
  • Inspection fixtures — CMM datum references
  • Custom workholding solutions — your design, our build

Materials

Aluminum 6061/7075, tool steel, 4140, stainless 303/304. Flatness within 0.01mm per 300mm.

Quality

Every fixture component is CMM-inspected. Full dimensional report included. Surface finish Ra 0.8μm or better.

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Frequently Asked Questions

What materials do you use for automation fixture plates?

We machine fixture plates from 6061-T6 and 7075-T6 aluminum, A2/D2 tool steel, and 304/316 stainless steel. Aluminum is preferred for weight reduction on pallet systems, while tool steel is chosen for high-wear locating pins and bushings. All materials are certified with traceable mill test reports.

What tolerances can you hold on fixture locating pins?

We hold ±0.005mm on locating pin diameters and ±0.01mm on pin-to-pin center distances. All critical dimensions are verified with Zeiss CMM and documented in our inspection reports. Our DMG MORI 5-axis machines ensure positional accuracy across complex fixture assemblies.

Do you machine complete fixture assemblies or just components?

We machine both individual fixture components and complete weldment assemblies. For built-up fixtures, we machine the base plate, risers, locating pins, clamps, and bushings, then supply them as a kitted assembly with BOM and inspection certificate. We also perform in-house surface grinding and EDM for key features.

What surface finish can you achieve on fixture locating surfaces?

We achieve Ra 0.4µm on locating surfaces and Ra 0.8µm on general fixture faces. Where required, we can grind to Ra 0.2µm for precision wear strips and locating pads. Surface finishes are verified with Mitutoyo profilometers.

Can you coat or harden fixture components?

Yes. We offer hard anodizing (MIL-A-8625 Type III), nitriding, black oxide, electroless nickel plating, and DLC coating for wear resistance. Our partners are ISO 9001 certified coating facilities. We also have in-house heat treatment capability for stress relieving and through-hardening.

What file formats do you accept for fixture machining?

We accept STEP, IGES, Parasolid, SolidWorks, and AutoCAD DWG/DXF files. For complex fixture assemblies, we prefer STEP AP242 with PMI for GD&T callouts. Our engineering team can also work from PDF drawings and reverse-engineer existing fixtures.

Buying Guide

Custom Automation Fixtures CNC Machining — Design for Manufacturability Guide

1. Choose 6061-T6 for Most Fixtures

Aluminum 6061-T6 is the go-to material for automation fixtures with excellent machinability, good strength-to-weight ratio, and cost-effectiveness. Upgrade to 7075 for higher wear applications.

2. Dowel Pin Holes Define Accuracy

Fixture locating features and dowel pin holes should be specified at ±0.01mm with true position ≤0.02mm. CMM inspection is essential for repeatability in automated assembly cells.

3. Weight Reduction Without Sacrificing Rigidity

Pocketing and ribbed designs can reduce fixture weight by 40% while maintaining stiffness. TruPart can optimize your design for both weight reduction and dynamic stability.

4. Hard Coat Anodizing for Wear Protection

Hard coat anodizing per MIL-A-8625 Type III creates a 25-50μm ceramic-like surface that extends fixture life significantly, especially for high-cycle automated applications.

5. Quick-Change Features Save Downtime

Add zero-point clamping interfaces or locating bushings to your fixture design. Tool changes between production runs drop from hours to minutes with quick-change integration.

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STEP · IGES · PDF · SolidWorks · DWG