OpeningYour drawing defines the bore. We define the repeatability.We machine auto lathe spring collets and pin slot chucks to your exact print. Round bore, square bore, hex bore—if you can dimension i
Your drawing defines the bore. We define the repeatability.
We machine auto lathe spring collets and pin slot chucks to your exact print. Round bore, square bore, hex bore—if you can dimension it, we hold it. Every collet is verified before shipment. No exceptions.
This is precision manufacturing for people who measure twice. We are a CNC machine shop in Dongguan, China, with 20 years of experience cutting steel for automatic lathes, Swiss machines, and multi-spindle units. Send us your drawing. We will quote it in 12 hours.
| Parameter | Value | Notes |
|---|---|---|
| Materials | 65Mn, 60Si2Mn, 9Cr18, 40Cr, SUS304, SUS420 | Spring steel or stainless, hardened as required |
| Bore diameter | 1.0 mm – 50.0 mm | Round, square, hex, or custom profile |
| Outer diameter | 5.0 mm – 120.0 mm | Matches your spindle or holder |
| Length | 10 mm – 150 mm | Slot depth and pin position per drawing |
| Tolerance | ±0.005 mm on bore, ±0.01 mm on OD | Verified with air gauge or CMM |
| Surface finish | Ra 0.4 µm on bore, Ra 0.8 µm on OD | Polished or ground, no burrs |
| Hardness | HRC 42–52 (spring collets), HRC 58–62 (pin slot chucks) | Through-hardened or induction hardened |
| Slots | 3-slot, 4-slot, or 6-slot | Milled with EDM or CNC, edge radius per spec |
| Processes | CNC turning, CNC milling, wire EDM, heat treatment, centerless grinding | All in-house, one factory |
| Batch size | 1 piece to 100,000 pieces | No MOQ, tooling amortized per order |
| Inspection | 100% dimensional check on critical bores | Report with CMM data, material cert, hardness test |
We run these on Citizen and Star CNC lathes for the collet bodies, then finish slots with wire EDM. Heat treatment is done in-house with a vacuum furnace, so we control distortion. Centerless grinding brings the OD to spec after hardening. Every collet gets a final bore check with an air gauge—if it does not pass, it does not ship.
1. Batch-traceable quality. Each heat number is recorded. Each batch gets a unique job number. If you need to trace a collet back to its steel coil, we can do it in minutes. We keep records for five years.
2. Inspection report per batch. You do not have to trust us. You get data. For every batch, we send a dimensional report with actual measured values, not just "passed." You also get a hardness certificate and material mill cert. If you want a full CMM report, we include it.
3. One factory for CNC, stamping, springs, and heat sinks. Your collet chuck might be a small part of a bigger assembly. We also run metal stamping lines, spring coiling machines, and heat sink fabrication. You send us one drawing package. We coordinate all processes under one roof. Fewer suppliers, fewer delays, one invoice.
Custom CNC collet chucks are not shelf items. They are made for specific machines and specific jobs.
If you are cutting bar stock or re-clamping a part with a pin, this collet is the interface between your machine and your part. Get it wrong, and every part is wrong. Get it right, and you forget it is there.
Looking for a different part? We also machine Custom CNC Collet Chuck Auto Lathe 15 Round Bore Precision Made in China in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We make one prototype for you to test, or we run 100,000 pieces. Tooling cost is quoted separately for small batches, but it is amortized if you repeat the order.
Q: How do you guarantee tolerance and quality? A: We use a CMM and air gauges for 100% inspection of critical bores. Each batch ships with a dimensional report, material cert, and hardness test. If a part is out of spec, we replace it at no cost, including shipping.
Q: What is your lead time? A: Standard lead time is 7–12 working days for prototypes, 15–20 working days for production runs. We can expedite to 5 days for a small surcharge if your machine is down.
Q: Do you provide material certificates? A: Yes. Every batch includes a mill test certificate for the raw material. If you need third-party testing (SGS, TÜV), we can arrange it at cost.
Stop guessing. Send us your drawing and get a firm quote in 12 hours.
Email: sc@bquq.com WhatsApp: +86 13713157787
Include your bore size, material, hardness, and quantity. We will confirm tolerances and lead time before you commit. Precision manufacturing, made in China, no MOQ. Your parts, our machines, verified before shipment.
| 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 |
