OpeningYour drawing defines the part. We machine it. Every collet is verified before shipment. No exceptions.This is a 25-type multi-slot round bore collet for auto lathes. It hold
Custom CNC Collet Chuck 25 Type Multi Slot Round Bore | BQUQ
OpeningYour drawing defines the part. We machine it. Every collet is verified before shipment. No exceptions.This is a 25-type multi-slot round bore collet for auto lathes. It holds bar stock from Ø3
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing defines the part. We machine it. Every collet is verified before shipment. No exceptions.
This is a 25-type multi-slot round bore collet for auto lathes. It holds bar stock from Ø3 mm to Ø25 mm. Slots are cut full-length for even clamping force. Bore tolerance is held to ±0.005 mm.
Tolerance: ±0.005 mm on bore, ±0.01 mm on OD
Lead time: 7–12 days for standard batches
No MOQ — order one piece or one thousand
Made in China, shipped from Dongguan
We are a precision manufacturing factory with 20 years in CNC machining, stamping, springs, and heat sinks. You send the drawing. We do the rest.
Specifications
Parameter
Value
Material
65Mn spring steel, 20CrMnTi, 40Cr, or per drawing
Hardness
HRC 48–52 (through-hardened) or HRC 58–62 (case-hardened)
Bore tolerance
±0.005 mm
OD tolerance
±0.01 mm
Slot width
0.5–3.0 mm, per drawing
Slot count
3, 4, 6, or 8 slots
Surface finish
Ra 0.4 µm on bore, Ra 0.8 µm on OD
Machining
CNC lathe, CNC milling, wire EDM for slots
Heat treatment
Vacuum hardening + tempering
Inspection
100% dimensional check, bore gauge + CMM
Batch size
1–50,000 pieces
Lead time
7 days for prototypes, 12 days for production
We use wire EDM for slot cutting. This gives a clean, burr-free edge. No laser. No plasma. The bore is ground after hardening. That is how we hold ±0.005 mm.
Three reasons buyers send us their drawings
1. Batch-traceable quality
Each batch gets a unique heat number and job number. Material certs are stored for 10 years. If a problem appears in your line, we trace it back to the exact melt and machine. You get full traceability, not a vague "we checked it."
2. Inspection report per batch
Every batch ships with a dimensional report. It lists bore diameter, OD, slot width, hardness, and surface finish. We use a CMM and bore gauges calibrated to ISO 9001 standards. You do not need to re-inspect everything. Spot-check and run.
3. One factory for CNC + stamping + spring + heatsink
Your collet is not the only part in your assembly. We also make springs, stamped brackets, and heatsinks. One purchase order, one supplier, one shipping date. Fewer emails, fewer delays, lower freight cost.
Where these parts are used
This 25-type collet is for auto lathes — the kind used in high-volume screw machining. Typical applications:
Watch and instrument parts — pinions, shafts, gears under Ø10 mm. The multi-slot design holds thin stock without marking it.
Medical device components — bone screws, drill bits, catheter fittings. Clean, burr-free slots prevent contamination.
Electronics connectors — brass and copper pins for USB, HDMI, and automotive connectors. The round bore grips plated stock without scratching.
Fastener production — bolts, rivets, and standoffs from Ø3 mm to Ø25 mm. The 25-type body fits standard auto lathe spindles.
Aerospace and defense — small titanium and stainless parts. Case-hardened collets hold tight tolerance over long runs.
If you run an auto lathe, you need a collet that does not drift. Ours do not.
Q: What is your MOQ?
A: No MOQ. We make one piece for prototyping or 50,000 for production. The unit price drops with quantity, but the quality standard is the same.
Q: How do you guarantee ±0.005 mm tolerance?
A: We grind the bore after heat treatment. Then we measure every part with a bore gauge. A CMM spot-check is done per batch. The inspection report ships with the goods.
Q: What is the lead time for a custom CNC collet chuck?
A: Prototypes in 7 days. Production batches in 12 days after drawing approval. For urgent orders, we can rush in 5 days at a 10% surcharge.
Q: Can you provide material certificates?
A: Yes. Mill test certificates, heat treatment reports, and hardness test reports are available for every batch. We keep records for 10 years.
Send your drawing
Send us your PDF or STEP file. We will check the bore, slot count, and material. You get a firm quote in 12 hours.
No MOQ. No hidden tooling fees. Just precision manufacturing, made in China, verified before shipment.
Email: sc@bquq.com
WhatsApp: +86 13713157787
Your custom CNC collet chuck is one drawing away. Send it.
