OpeningWe machine your mixed bore collets to your drawing. Not from stock. Not modified from a standard blank. We start with your print and end with a verified part.Every collet is
OpeningWe machine your mixed bore collets to your drawing. Not from stock. Not modified from a standard blank. We start with your print and end with a verified part.Every collet is checked before ship
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
We machine your mixed bore collets to your drawing. Not from stock. Not modified from a standard blank. We start with your print and end with a verified part.
Every collet is checked before shipment. You get a part that holds your workpiece concentric and repeatable. We have done this for 20 years.
Tolerance: ±0.005 mm on bore and taper
Lead time: 10–15 working days for batches under 500 pcs
We grind the taper and bore in one setup. This keeps concentricity under 0.005 mm. We use coolant-fed grinding for consistent surface finish on hardened steel.
Three reasons buyers send us their drawings
1. Batch-traceable quality
Each batch gets a unique job number. We record material heat number, machine operator, and inspection results. If you have a problem, we trace it to the exact step. No guesswork.
2. Inspection report per batch
You receive a CMM report, hardness report, and surface roughness report with every shipment. We do not ask you to trust us. We show you the numbers.
3. One factory for CNC + stamping + spring + heatsink
Your collet is not the only part in your assembly. We also make springs, stampings, and heat sinks. Send us the whole assembly drawing. We quote and machine all parts under one roof. Fewer suppliers, fewer logistics headaches, one invoice.
Where these parts are used
Our mixed bore collets go into automatic lathes for high-volume turning. Typical applications:
Automotive fuel injector bodies – bore holds the blank, taper centers it, repeatability holds 0.005 mm over 10,000 cycles
Medical device pins and screws – small diameters, tight concentricity, no burrs on the bore
Electronic connector pins – mixed bores for different pin diameters on one machine turret
Fastener manufacturing – hex and round blanks held without marking the surface
We also make custom collets for special machines. If you have a non-standard taper or bore, we machine it. No need to redesign your machine around a catalog part.
Q: What is your MOQ?
A: No MOQ. We make one piece for prototypes and 50,000 pieces for production. The unit price drops with quantity, but the quality standard stays the same.
Q: How do you guarantee tolerance and quality?
A: We grind the bore and taper in one setup. CMM inspection on every batch. We send you the report. If any part is out of spec, we replace it at our cost.
Q: What is your lead time?
A: Standard lead time is 10–15 working days for batches under 500 pcs. Larger batches take 20–25 working days. We can expedite to 5 working days for an extra charge.
Q: Do you provide material certificates?
A: Yes. We include mill certificates for raw material, heat treatment reports, and hardness test results with every shipment. For aerospace or medical orders, we provide full traceability documentation.
Send your drawing
Send us your drawing. We reply with a firm quote within 12 hours. No vague estimates. No hidden costs.
Email: sc@bquq.com
WhatsApp: +86 13713157787
We are a precision manufacturing factory in Dongguan, China. We have been making custom CNC collet chucks and other machined parts for 20 years. Your drawing is the starting point. We handle the rest.
