Your BT40 collet chuck starts as a drawing. It leaves our floor as a verified part. We machine to your print, not to a catalog standard. Every chuck is checked before
Your BT40 collet chuck starts as a drawing. It leaves our floor as a verified part. We machine to your print, not to a catalog standard. Every chuck is checked before shipment—runout, tap
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We are a precision manufacturing factory in Dongguan, China. 20 years in CNC machining, stamping, springs, and heat sinks. Your tool holder gets the same engineering discipline as our aerospace and automotive work.
| Specifications | |
|---|---|
| Parameter | Value |
| Material options | 20CrMnTi, 40Cr, 42CrMo, 9Cr18, or per drawing |
| Hardness | Core 28–32 HRC; surface 58–62 HRC (carburized or induction hardened) |
| Taper | BT40, AT3 or AT4 per ISO 7388 |
| Runout (TIR) | ≤ 0.01 mm at nose, ≤ 0.005 mm at grip |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on body |
| Threads | Ground after heat treatment, class 6H |
| Keyway | Milling or broaching, width tolerance ±0.02 mm |
| Balancing | G2.5 at 15,000 rpm optional |
| Process | CNC turning, CNC milling, cylindrical grinding, centerless grinding |
| Inspection | CMM, hardness tester, runout gauge, taper gauge |
| Batch size | 1–10,000 pcs |
| Lead time | 15 days for prototypes, 20 days for production |
| Country | Made in China, Dongguan factory |
We use Mori Seiki and Fanuc CNC lathes for the body. Grinding is done on Studer and Jones & Shipman machines. Heat treatment is in-house, so we control case depth and distortion. No outsourced steps. No guessing on metallurgy.
2. Inspection report per batch. You get a full dimensional report with every shipment. Not a generic certificate—actual measured values. Taper contact percentage, runout at three positions, hardness readings, surface roughness. If a value is out, we flag it before shipping, not after you receive it.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck might need a spring collet, a stamped retention knob, or a heat sink for a high-speed spindle. We make all of them under one roof. One purchase order, one quality system, one shipping date. Fewer suppliers, fewer delays, fewer arguments.
Q: How do you guarantee tolerance and runout? A: We grind the taper and bore in the same setup. Then we measure runout on a precision arbor with a 0.001 mm indicator. The inspection report shows actual numbers, not just a pass/fail stamp.
Q: What is the lead time for a custom BT40 collet chuck? A: 15 working days for prototypes, 20 for production batches. If you need faster, we can quote an express fee for a 7-day turnaround. We stock common 20CrMnTi blanks.
Q: Do you provide material certificates? A: Yes. Mill certificates for raw material, heat treatment reports, and hardness test results. All are included free. Third-party inspection (SGS, TUV) is available at cost.
Email: sc@bquq.com WhatsApp: +86 13713157787
Custom CNC collet chuck, made in China, no MOQ. Your drawing, our machines, verified results.
| 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 |
