Carbon fiber jig and fixture with precision locating pads and clamping surfaces made in China YTCarbon
Carbon fiber fixture assembly with multiple components and datum features China factory YTCarbon
CFRP fixture compared with steel fixture showing 60 percent weight reduction China YTCarbon factory
Carbon fiber fixture with release coating on contact surfaces for autoclave use China factory

Carbon Fiber Jig & Fixture

When your composite parts go into an autoclave at 180 °C, metal fixtures expand — and your tolerances vanish. Carbon fiber jigs and fixtures match the CTE of the parts they hold, so dimensions stay locked from layup through cure. We build them from the same CFRP we machine every day, right here in our Shenzhen factory.

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Product Details

Metal fixtures have been the default in composite manufacturing for decades — but they come with a problem that gets worse as tolerances tighten: thermal expansion. An Invar jig gains roughly 1.2 µm per mm over a 150 °C temperature swing. On a 2-meter wing skin, that is 2.4 mm of drift. Carbon fiber fixtures? Near zero. The CTE of CFRP (0.2–1.0 × 10⁻⁶/°C) closely matches the composite parts being cured, so your layup dimensions hold true from room temperature through autoclave cycle and back.

That is not the only advantage. A carbon fiber fixture typically weighs 60–70% less than its steel counterpart, which means easier handling on the shop floor, faster loading and unloading, and less wear on your autoclave cart rails. For aerospace and automotive composite lines where fixtures are cycled hundreds of times, the weight savings compound into real labor and energy cost reductions over the life of the tool.

We build these fixtures from the same CFRP blanks we machine daily. Send us your part geometry and fixturing requirements — we design the fixture layout, machine all locating surfaces and datum features to ±0.05 mm, and deliver a ready-to-use tool with documented dimensional inspection. No need to source the carbon fiber material separately and then find a machine shop; we handle the full chain under one roof.

Specifications

Specification Details
Material 3K / 12K Carbon Fiber + Epoxy Resin (CFRP)
Weave Pattern Plain / Twill / Unidirectional / Quasi-isotropic Layup
Forming Process CNC Machining from Pre-cured CFRP Blanks + Bonded Assembly
CTE (Coefficient of Thermal Expansion) 0.2–1.0 × 10⁻⁶/°C (Matched to CFRP Parts)
Max Operating Temperature 180 °C (Autoclave) / 260 °C (Short-term Peak)
Machining Tolerance ±0.05 mm (Datum Surfaces)
Surface Finish Matte (Standard) / Sealed with Release Coating
Mold Type CNC Fixture / Vacuum Jig (No Mold Required)
Drawing Formats STEP, STP, IGS — flexible customization from 3D design drawings
Mold Lead Time 5–7 Days (Fixture Setup)
MOQ 1 Set (Prototype) / 10+ (Production)

Applications

  • Autoclave Curing — CTE-matched fixtures keep composite parts dimensionally stable through 180 °C cure cycles.
  • Aerospace Assembly — Lightweight locating jigs for wing skin and fuselage panel alignment.
  • RTM Mold Fixturing — Stiff, non-reactive frames that hold mold halves under injection pressure.
  • EV Battery Enclosure — Non-conductive, dimensionally stable holds for assembly and welding.
  • Semiconductor Processing — Thermal-cycling fixtures that do not drift during repeated bake-out steps.

Why Choose YTCarbon

  • Factory Direct Tooling — We exhibited at the 2025 World UAV Expo — see what a real carbon fiber factory puts on the table. Same CFRP, same machines, one roof.
  • CTE Matched by Design — We select layup sequences to match your part’s thermal expansion, not just machine generic blanks.
  • 60–70% Lighter Than Steel — Easier handling, faster autoclave loading, less wear over thousands of cycles.
  • Full-Chain Service — Material, machining, bonding, release coating, and inspection all in one place.
  • Autoclave Proven — Zero measurable dimensional drift after 500+ cycles at 180 °C.

Certifications

Every carbon fiber jig and fixture ships with a dimensional inspection report and material traceability documentation. Our facility holds ISO 9001:2015 certification, and we follow aerospace-grade quality control protocols for every fixture — whether it is holding a drone frame or a satellite panel. CTE test data available on request.

Carbon fiber jig fixture ISO SGS certifications quality inspection China factory YTCarbon

How We Manufacture Your Carbon Fiber Jig & Fixture

We start from your part CAD model and fixturing requirements. Our engineers design the fixture layout — locating pads, clamping surfaces, datum features — then select a CFRP layup that matches your part’s CTE. We machine individual fixture components from pre-cured blanks on our 5-axis CNC centers, bond them into sub-assemblies using high-temperature structural adhesive, apply a release coating to all contact surfaces, and run a final dimensional check before shipping. The whole process takes 10–15 working days from drawing approval.

Carbon fiber jig fixture manufacturing process flow from design to delivery China YTCarbon

FAQ

+ Why use carbon fiber jigs instead of metal fixtures for autoclave curing?
Metal fixtures expand significantly during autoclave cycles — Invar moves about 1.2 µm/mm over a 150 °C swing, which adds up to millimeters on large parts. Carbon fiber fixtures have a CTE of 0.2–1.0 × 10⁻⁶/°C, closely matching the composite parts they hold. Your part stays where you put it, from layup through cure and cool-down.
+ What temperature range can carbon fiber fixtures withstand?
Our standard epoxy-based CFRP fixtures are rated for continuous use at 180 °C — well within typical autoclave cure profiles. For short-term peaks, they tolerate up to 260 °C. If your process runs hotter, we can switch to BMI or cyanate ester resin systems that push the ceiling above 300 °C.
+ How do you match the CTE of the fixture to my composite part?
We tailor the fiber orientation and layup sequence of the fixture blank to your part’s thermal expansion behavior. A quasi-isotropic layup gives balanced, near-zero CTE in all directions. For parts with dominant expansion along one axis, we orient unidirectional plies to compensate. We share the layup design with you before machining so you can verify the match.
+ Can carbon fiber fixtures handle repeated autoclave cycles?
Yes. We have test data showing zero measurable dimensional drift after 500+ autoclave cycles at 180 °C. The key is using a post-cured, high-Tg resin system that does not soften or creep at cure temperature. We also apply a release coating to all contact surfaces to prevent resin adhesion buildup over time.
+ What is the lead time for a custom carbon fiber fixture set?
Typically 10–15 working days from drawing approval to shipment. This includes layup design review (2–3 days), blank preparation and CNC machining (5–7 days), bonding and release coating (2–3 days), and final dimensional inspection (1–2 days). Rush orders can compress the timeline to 7–8 working days if needed.

Need Custom Carbon Fiber Jigs & Fixtures?

CTE-matched, autoclave-proven, 60% lighter than steel. Send your part model and get a fixture design in 48 hours.