OpeningYour drawing defines the part. We machine it, verify it, and ship it with a full inspection report. No guesswork, no hidden deviations.This is a mid-series collet set for CNC auto lathes, cover
Your drawing defines the part. We machine it, verify it, and ship it with a full inspection report. No guesswork, no hidden deviations.
This is a mid-series collet set for CNC auto lathes, covering 25 mm, 28 mm, 30 mm, and 32 mm bar capacities. Built for high-speed, high-repeatability clamping in production turning centers.
| Parameter | Value |
|---|---|
| Available sizes | 25 mm, 28 mm, 30 mm, 32 mm (mid series) |
| Material options | 20CrMnTi (case-hardened), 65Mn (spring steel), 9CrSi (wear-resistant) |
| Hardness | 58–62 HRC after carburizing or oil quenching |
| Bore tolerance | ±0.005 mm |
| Taper angle tolerance | ±0.002° |
| Surface finish | Ra 0.4 μm on taper, Ra 0.8 μm on bore |
| Slots | Precision wire-cut, width ±0.01 mm |
| Heat treatment | Carburizing depth 0.8–1.2 mm, or through-hardening |
| Balancing | Dynamic balanced for speeds up to 8000 RPM |
| Inspection | 100% dimensional check, 100% hardness test, 5% taper gauge test |
| Batch traceability | Heat number and batch code laser-marked on each collet |
| Packaging | Anti-rust oil, individual foam slot, export carton |
We use CNC lathes and wire EDM for slotting. Grinding is done on cylindrical and internal grinders with in-process gauging. Every collet is matched to a master taper gauge before shipment.
1. Batch-traceable quality, not just a box of parts. Each batch gets a unique code. We record material certs, heat treatment curves, and final inspection data against that code. If a problem appears in your line, you can trace it back to the exact melt and grind shift. No ambiguity.
2. Inspection report per batch, free with every order. You get a PDF with actual measured values — bore diameter, taper angle, hardness, surface roughness. Not a generic certificate. Real numbers from real gauges. This saves your incoming QC time and removes surprises.
3. One factory for CNC machining, stamping, springs, and heat sinks. Your collet chuck is rarely the only part you need. We run four production lines under one roof. Send us a drawing package with a collet, a spring, a stamped bracket, and a heat sink — we quote them together, machine them together, and ship them together. Fewer suppliers, fewer logistics headaches, one accountable partner.
This collet set is standard for Swiss-type lathes and sliding-headstock CNC machines. Typical applications:
The mid-series design gives you a wider gripping range per collet, reducing changeover time in mixed-batch production. Hardened slots and ground tapers hold up through millions of cycles without losing grip force.
Looking for a different part? We also machine Custom CNC Collet Chuck 3 Jaw Through Hole Auto Lathe | BQUQ Precision in the same Dongguan factory.
Q: Is there really no MOQ? A: Correct. We accept one-piece orders for custom CNC collet chucks. The price per piece is higher for single units, but the engineering and inspection process is identical. Many buyers order one sample, test it, then scale up.
Q: How do you guarantee tolerance and quality? A: We grind the bore and taper after heat treatment, not before. Then we check 100% of parts with air gauges and a calibrated taper master. The inspection report shows actual values, not pass/fail marks. If a part is out of spec, it does not ship.
Q: What is your lead time for a custom collet set? A: Standard sizes (25, 28, 30, 32) ship in 7–10 days. Custom bore profiles or special slot designs take 15 days from drawing approval. Urgent orders can be expedited to 5 days for standard materials.
Q: Can you provide material certificates and heat treatment reports? A: Yes. Every batch includes a mill certificate for the raw material and a heat treatment curve log. We can also provide third-party testing if your customer requires it — just note it on your RFQ.
We respond with a firm quote within 12 hours. No vague estimates, no hidden tooling costs. You get a price, a lead time, and a delivery date.
Email your PDF or STEP file to sc@bquq.com Or message us on WhatsApp: +86 13713157787
Precision manufacturing, made in China, with no MOQ and full traceability. Send the drawing — we will do the rest.
| 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 |
