OpeningYour BT40 collet chuck is machined from your drawing, not from a stock catalog. We verify every dimension before shipment. If the drawing is right, the part is right.At a gl
Custom CNC Collet Chuck BT40 End Mill Holder Precision Made in China
OpeningYour BT40 collet chuck is machined from your drawing, not from a stock catalog. We verify every dimension before shipment. If the drawing is right, the part is right.At a glance: Runout toleran
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your BT40 collet chuck is machined from your drawing, not from a stock catalog. We verify every dimension before shipment. If the drawing is right, the part is right.
At a glance: Runout tolerance ≤ 0.005 mm (TIR), taper angle AT3 per ISO 7388, lead time 10-15 working days, no MOQ, batch-traceable material.
We are a precision manufacturing factory in Dongguan, China. Twenty years of CNC machining experience. We make the part you need, not the part we have in stock.
Specifications
Parameter
Value
Material
20CrMnTi (case-hardened) or 40CrMo (through-hardened), per drawing
10-15 working days for prototypes, 20-25 for production
MOQ
No MOQ
We grind the taper after heat treatment. That is the only way to hold AT3. We do not skip this step.
Three reasons buyers send us their drawings
1. Batch-traceable quality. Each batch gets a heat number and a unique job number. We keep records for 10 years. If a problem appears in your assembly line, we trace it to the exact heat treatment cycle and grinding wheel. No guesswork.
2. Inspection report per batch. You get a full CMM report with every shipment. The report shows taper angle, runout, hardness, and surface finish. We do not send a generic certificate. We send your numbers, measured on your parts.
3. One factory for CNC, stamping, springs, and heat sinks. Your BT40 collet chuck is not the only part you need. If your machine build requires a spring-loaded retention knob, a stamped cover plate, or a heat sink for the spindle drive, we make it in the same building. One purchase order, one quality system, one shipping date.
Where these parts are used
Our custom CNC collet chucks go into real production environments.
CNC machining centers: BT40 spindles on vertical and horizontal mills. Holding end mills from 6 mm to 20 mm for steel and aluminum cutting.
Automotive line tooling: High-volume drilling and tapping stations where tool change time is critical. The AT3 taper ensures repeatable seating.
Die and mold shops: Finishing operations on hardened tool steel. The 0.005 mm runout reduces chatter and extends tool life.
Aerospace subcontractors: Titanium and Inconel roughing. The rigid collet pocket and ground taper handle high torque without pullout.
Automation cells: Robotic tool changers. The collet chuck body is machined for automatic gripper interfaces per your drawing.
If your application is different, send the drawing. We have made collet chucks for PCB drilling spindles and for heavy-duty railway milling. The geometry changes, the process discipline does not.
Q: What is your MOQ?
A: No MOQ. We make one piece for prototype validation. For production, we offer tiered pricing at 10, 50, 100, and 500 pieces. You pay for the parts, not for a minimum run.
Q: How do you guarantee tolerance and quality?
A: We grind the taper and bore after heat treatment. We measure with a CMM and a taper gauge. Runout is checked on a test arbor. Every part gets a final inspection. The report is included in the shipment.
Q: What is the lead time for a custom CNC collet chuck?
A: Prototype: 10-15 working days after drawing approval. Production: 20-25 working days. If you need faster, we can split the batch and ship the first 20% earlier. We do not quote impossible dates.
Q: Can you provide material certificates?
A: Yes. We provide mill certificates for the raw material, heat treatment reports, and hardness test results. All documents are in English and can be notarized if your customer requires it.
Send your drawing
Send us your drawing in STEP, IGES, or PDF. We will check the geometry, confirm the material, and give you a firm quote in 12 hours.
No MOQ. No hidden tooling charges. No surprises.
Email: sc@bquq.com
WhatsApp: +86 13713157787
We are a precision manufacturing factory in Dongguan, China. We have been making CNC tool holders for 20 years. Your drawing is the next part we make.
