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 in
Custom CNC Collet Chuck Auto Lathe 28 Type Round Bore | BQUQ
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
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
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.
Tolerance: ±0.005 mm on bore and taper
Lead time: 15–20 working days for standard sizes
No MOQ — order one piece or one thousand
Material: 20CrMnTi or 65Mn, case-hardened to HRC 58–62
Made in China, precision manufacturing since 2005
Specifications
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.
Three reasons buyers send us their drawings
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.
Where these parts are used
A 28 type round bore collet chuck is the workholding core for small-diameter bar work on automatic lathes. Typical applications:
Watch pinions and balance staffs — bores from Ø3 mm to Ø8 mm, need sub-micron concentricity
Medical screw implants — titanium and stainless, batch sizes of 500–5000, require full traceability
Connector pins for automotive sensors — brass and free-cutting steel, high feed rates, slot wear is the failure point
Hydraulic valve spools — Ø10 mm to Ø20 mm, need taper accuracy to hold hydraulic clearance
Fastener blanks — Ø6 mm to Ø28 mm, high volume, our 65Mn version gives 2x longer life than standard 20CrMnTi
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.
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.
Send your drawing
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.
