OpeningYour drawing becomes a finished collet chuck, verified before shipment. We machine the 30 Type round bore collet chuck to your exact dimensions, not a stock approximation.Concentricity toleranc
Your drawing becomes a finished collet chuck, verified before shipment. We machine the 30 Type round bore collet chuck to your exact dimensions, not a stock approximation.
This is a precision manufacturing job. We treat it like one. Every bore, every taper, every slot is cut on CNC lathes and verified with calibrated gauges before the part leaves Dongguan.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi, 40Cr, 9SiCr, 65Mn, or per drawing |
| Hardness | 58–62 HRC (carburized or induction hardened) |
| Concentricity (TIR) | ≤ 0.005 mm |
| Bore diameter range | 3 mm – 30 mm |
| Surface finish | Ra 0.4 µm on bore, Ra 0.8 µm on taper |
| Machining process | CNC turning, internal grinding, wire EDM for slots |
| Heat treatment | Carburizing, quenching, tempering |
| Inspection | 100% dimensional check, magnetic particle test on request |
| Batch size | 1 piece to 10,000 pieces |
| Lead time | 7 days for prototype, 12 days for production batch |
We make the collet chuck body from alloy steel, then grind the bore and taper in the same setup. That is how we hold 0.005 mm concentricity. Slots are cut by wire EDM, not milling, to avoid burrs and stress points.
1. Batch-traceable quality. Each heat treatment lot is logged. Each machining batch carries a unique number. If you need to trace a part back to its steel coil and operator, we can do that in minutes. No guesswork.
2. Inspection report per batch. You get a dimensional report with every shipment. Bore diameter, taper angle, hardness, and concentricity are listed with actual measured values. We do not send a generic certificate. You see the numbers.
3. One factory for CNC + stamping + spring + heatsink. Your collet chuck is not an island. If your assembly also needs a stamped retainer, a coil spring, or a heat sink, we make those in the same building. One purchase order, one quality system, one shipping date. That saves you weeks.
The 30 Type round bore collet chuck is a workhorse in automatic lathes. You will find it in:
In each case, the collet chuck must grip hard, release fast, and repeat within microns for thousands of cycles. That is what we build.
Looking for a different part? We also machine Custom CNC Machined Auto Lathe 15 Type Hex Bore Spring Collet | BQUQ in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We make one piece for a prototype or 10,000 pieces for production. The price per piece drops with quantity, but we do not force you to buy more than you need.
Q: How do you guarantee tolerance and quality? A: We grind the bore and taper in one clamping. Every part is measured with a bore gauge and a taper ring. We send the inspection report with the shipment. If a part is out of spec, we replace it at no cost.
Q: What is the lead time for a custom CNC collet chuck? A: Prototype in 7 working days. Production batches in 12 working days after drawing approval. For urgent orders, we can split the batch and ship the first 20% in 5 days.
Q: Do you provide material certificates? A: Yes. We provide mill certificates for the raw steel, heat treatment reports, and hardness test results. All documents are in English and can be notarized if your customer requires it.
We quote firm prices in 12 hours. Send your drawing in PDF, STEP, or IGES format. We will check the design for manufacturability, suggest a material grade if you are unsure, and give you a fixed price with a delivery date.
Email: sc@bquq.com WhatsApp: +86 13713157787
Your custom CNC collet chuck, made in China, verified before shipment. No MOQ, no surprises.
| 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 |
