OpeningSend us your drawing for a custom CNC collet chuck. We machine it to your exact specs, verify round bore concentricity before shipment, and back it with a batch-traceable inspection report.Tole
Send us your drawing for a custom CNC collet chuck. We machine it to your exact specs, verify round bore concentricity before shipment, and back it with a batch-traceable inspection report.
| Parameter | Value |
|---|---|
| Type | Auto lathe 28 type round bore collet chuck |
| Bore diameter range | Ø3 mm – Ø28 mm (custom per drawing) |
| Taper angle | 30° (standard), custom on request |
| Concentricity (TIR) | ≤0.005 mm at nose |
| Surface roughness | Ra 0.4 µm on bore, Ra 0.8 µm on taper |
| Material | 20CrMnTi (case-hardened), 65Mn (spring steel) |
| Hardness | HRC 58–62, case depth 0.8–1.2 mm |
| Machining process | CNC turning, internal grinding, wire EDM for slots |
| Slots | 3-slot or 4-slot, width 1.5–3.0 mm per drawing |
| Finish | Black oxide or plain, no coating unless specified |
| Batch size | 1–5000 pcs, no MOQ |
| Inspection | 100% dimensional check, CMM report per batch |
We run these on Citizen and Star sliding-head lathes for the chuck body, then finish grind the bore and taper on a Junker internal grinder. Slots are cut with wire EDM to avoid burrs. Every chuck is tested with a master collet before packing.
1. Batch-traceable quality. Each batch gets a unique heat number and serial range. We record material certs, grinding wheel specs, and final gauging results. If you have a problem six months later, we trace it to the exact shift and machine.
2. Inspection report per batch. You get a CMM report with bore diameter, taper angle, concentricity, and slot width for every piece. No sampling guesswork. We also include a video of the final run-out check on request.
3. One factory for CNC + stamping + spring + heatsink. Your collet chuck is not an island. If your assembly needs a spring-loaded pusher, a stamped retainer, or a heatsink for a motor driver, we make all of it under one roof. Fewer vendors, shorter lead times, one accountable partner.
A 28 type round bore collet chuck is the workholding core for small-diameter bar work on automatic lathes. Typical applications:
If you machine bar stock on a Swiss or automatic lathe, this chuck is the part that decides your scrap rate. We make it to hold tight.
Looking for a different part? We also machine Custom CNC Collet Chuck 36 Type Auto Lathe Precision Made in China in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We make one piece for prototype validation, then scale to your production quantity. Tooling cost is amortized into the unit price, so a single piece is slightly higher per unit but still firm-quoted.
Q: What tolerance can you hold on the bore and taper? A: Standard is ±0.005 mm on bore diameter and ±0.002 mm on taper angle. For high-speed auto lathe use, we recommend specifying TIR ≤0.005 mm at the nose. We verify with a CMM and a master collet before shipment.
Q: What is your lead time for a custom CNC collet chuck? A: 15–20 working days for standard materials and sizes. If you need 65Mn with special slot geometry, add 3–5 days for wire EDM. We ship DHL or FedEx, door-to-door.
Q: Do you provide material certificates? A: Yes. Every batch comes with a mill certificate for the raw material (20CrMnTi or 65Mn), heat treatment report, and hardness test results. No extra charge.
Email your PDF or STEP file to sc@bquq.com. We reply with a firm quote in 12 hours — price, lead time, and tolerance confirmation.
Prefer chat? WhatsApp +86 13713157787 with a photo of your drawing. We answer within the hour during China business time (GMT+8).
Your custom CNC collet chuck, made in China, verified before shipment. No MOQ, no surprises.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
