OpeningYour tool holder drawing defines the geometry. Our CNC machines define the tolerance. We machine BT, HSK, and SK collet chucks directly from your CAD files, then verify every critical dimension
Your tool holder drawing defines the geometry. Our CNC machines define the tolerance. We machine BT, HSK, and SK collet chucks directly from your CAD files, then verify every critical dimension before the parts leave our floor in Dongguan.
At a glance: Runout tolerance of 0.005 mm TIR, surface finish down to Ra 0.4, lead time 15–20 working days, no MOQ.
This is precision manufacturing for tooling that must hold rigidly and run true. We do not guess. We measure.
| Parameter | Value |
|---|---|
| Available Standards | BT30, BT40, BT50; HSK-A/C/E/F 32–100; SK30–50 |
| Material | 20CrMnTi, 40Cr, 8620, or per your spec |
| Hardness | Carburized 58–62 HRC, core 30–42 HRC |
| Runout (TIR) | ≤ 0.005 mm at nose, ≤ 0.008 mm at 4×D |
| Surface Finish | Ra 0.4 on taper, Ra 0.8 on external surfaces |
| Taper Angle Tolerance | AT3 or better per DIN 69871 / ISO 7388 |
| Threads | Ground, class 6H or better |
| Balancing | G2.5 at 20,000 RPM optional |
| Process | CNC turning, 5-axis milling, ID/OD grinding, lapping |
| Inspection | CMM, air gauge, taper gauge, hardness tester |
| Batch Size | 1 piece to 5,000 pieces |
| MOQ | None |
| Lead Time | 15 days for prototypes, 20 days for production |
We grind the taper and bore in the same setup. This keeps the collet seat concentric to the taper. We do not cut corners on the clamping cone—it is lapped to a mirror finish for maximum grip and repeatability.
1. Batch-traceable quality. Every heat lot and machining batch gets a unique code. If you need to trace a tool holder back to its material cert and operator, we can do it in minutes. We keep records for 10 years.
2. Inspection report per batch. You receive a dimensional report for every batch, not a sample. We measure taper angle, runout, hardness, and surface finish on each piece. If a dimension is out, the part does not ship.
3. One factory for CNC + stamping + spring + heatsink. You send us a tool holder drawing, and we machine it. But if your assembly also needs a stamped retention knob, a spring collet, or a heatsink for a spindle motor, we make those too. One purchase order, one quality standard, one shipping point. Fewer suppliers, fewer headaches.
Custom CNC collet chucks are not shelf items. They go into machines that must hold tight tolerances all day.
If your machine has a spindle taper, we can make the holder that fits it.
Looking for a different part? We also machine Custom CNC Collet Chuck SK50 with Tap Holder | Precision Manufacturing in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We quote one piece or one thousand pieces at the same per-unit accuracy. Prototypes are welcome.
Q: How do you guarantee tolerance and quality? A: We grind the taper and bore in one setup. Every part is checked with a CMM and an air gauge. You get a batch inspection report with the shipment. If any dimension is out of spec, we replace the part at our cost.
Q: What is your lead time? A: 15 working days for prototype quantities. 20 working days for production batches. We can expedite to 10 days for critical orders, subject to material availability.
Q: Do you provide material certificates? A: Yes. We supply mill test certificates for the raw material, heat treatment reports, and hardness verification. All documents are traceable to the batch code on the part.
Stop comparing generic tool holder catalogs. Send us your drawing and get a firm quote for a custom CNC collet chuck built to your exact spec.
Email your PDF or STEP file to sc@bquq.com or WhatsApp us at +86 13713157787.
Precision manufacturing, made in China, verified before shipment. Your drawing is the starting point. The finished holder is the proof.
| 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 |
