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
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.
| Parameter | Value |
|---|---|
| Material | 20CrMnTi (case-hardened) or 40CrMo (through-hardened), per drawing |
| Hardness | 58-62 HRC (case depth 0.8-1.2 mm) |
| Taper | BT40, AT3 tolerance per ISO 7388 |
| Runout (TIR) | ≤ 0.005 mm at nose, ≤ 0.008 mm at 100 mm |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on body |
| Threads | Ground after heat treatment, class 6H |
| Keyway | Milling or wire-cut, width tolerance ±0.01 mm |
| Process | CNC turning, 5-axis milling, cylindrical grinding, surface grinding |
| Inspection | 100% dimensional check, CMM report per batch |
| Batch size | 1 piece to 10,000 pieces |
| Lead time | 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.
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.
Our custom CNC collet chucks go into real production environments.
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.
Looking for a different part? We also machine Custom CNC Collet Chuck HSK100 ER40 Precision Manufacturing Made in China in the same Dongguan factory.
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 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.
| 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 |
