OpeningYour drawing becomes a finished CNC collet chuck. We machine it to your exact dimensions, then verify every critical feature before shipment. No surprises on your spindle.Tolerance: ±0.005 mm o
Your drawing becomes a finished CNC collet chuck. We machine it to your exact dimensions, then verify every critical feature before shipment. No surprises on your spindle.
We are a precision manufacturing factory in Dongguan, China. Twenty years of CNC turning, milling, and grinding experience. Our external expanding collet chucks hold parts from the inside bore, giving you repeatable concentricity for second-operation work.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi, 40Cr, 65Mn, 9SiCr, 42CrMo, SUS440C |
| Hardness (finished) | HRC 58–62 (case-hardened or through-hardened) |
| Tolerance on OD | ±0.005 mm |
| Tolerance on taper angle | ±0.002° (checked with sine bar) |
| Surface finish | Ra 0.4 µm on locating surfaces |
| Expansion range | 0.1–0.3 mm on diameter (per chuck size) |
| Thread accuracy | Class 6H/6g |
| Balancing | G2.5 or better, if specified |
| Machining process | CNC turning, internal grinding, OD grinding, wire EDM for slots |
| Heat treatment | Vacuum carburizing or induction hardening |
| Batch size | 1–10,000 pieces |
| Inspection | 100% critical dimensions, CMM report per batch |
We grind the taper after heat treatment. That keeps the mating surface true to the chuck body. Slots are wire-cut, not milled, so the expansion fingers flex evenly without cracking.
1. Batch-traceable quality. Every chuck gets a unique serial number. We track material heat number, heat treatment batch, and final inspection data against that number. If a problem appears on your line, we trace it to the exact process step. No guesswork.
2. Inspection report per batch. You get a full dimensional report with every shipment. Taper angle, OD, runout, hardness, and surface finish. We use a CMM and a profilometer. The report is signed by our QC lead, not a computer. If you need third-party inspection (SGS, TÜV), we arrange it at cost.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck is not an isolated part. Many buyers pair it with a stamped washer, a compression spring, or a heat sink for the same assembly. We make all of them under one roof. One purchase order, one quality system, one shipping date. Fewer suppliers, fewer delays.
External expanding collet chucks are standard on automatic lathes (Swiss-type and cam-type) for second-operation work. Typical applications:
The common thread: the part has a finished bore, and you need to machine the outside without scratching or distorting that bore. A custom CNC collet chuck does that with 0.005 mm repeatability.
Looking for a different part? We also machine Custom CNC Collet Chuck Auto Lathe 25 Type Triangle Bar Stock in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We make one prototype for your trial, then scale to production. Tooling cost is quoted separately for a single piece, then amortized over larger orders.
Q: How do you guarantee tolerance and quality? A: We grind the taper and OD after heat treatment. Every chuck is checked for runout on a precision mandrel. A CMM report is included per batch. If a dimension is out of spec, we replace the part at no cost, including freight.
Q: What is your lead time for custom chucks? A: 15–20 working days for standard materials and sizes. If you need a rush order, we can do 10 days for an additional 20% expedite fee. We confirm the exact date within 12 hours of receiving your drawing.
Q: Do you provide material certificates? A: Yes. We supply mill certificates for the raw material, heat treatment reports (hardness, case depth), and a RoHS/REACH declaration if required. All documents are in English.
Email your 2D or 3D file to sc@bquq.com. Include the material grade, required hardness, and your expected batch size. We reply with a firm quote within 12 hours.
Prefer to talk? WhatsApp us at +86 13713157787. We answer in English, seven days a week.
Your custom CNC collet chuck, made in China, machined to your drawing, verified before shipment. No MOQ, no runaround. Send the file today.
| 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 |
