## Opening
Your drawing defines the part. We machine it. Every collet set is verified before shipment. No exceptions.This is a custom CNC collet chuck set for auto lathes. It covers sizes 630, 640,
## Opening Your drawing defines the part. We machine it. Every collet set is verified before shipment. No exceptions.
This is a custom CNC collet chuck set for auto lathes. It covers sizes 630, 640, 643, 650, 700, and Jumbo. We make these to your exact dimensions, not off-the-shelf approximations.
| ## Specifications | |
|---|---|
| Parameter | Value |
| Available sizes | 630, 640, 643, 650, 700, Jumbo |
| Material options | 20CrMnTi, 65Mn, 9SiCr, or per drawing |
| Hardness | Case-hardened HRC 58–62, core HRC 35–45 |
| Tolerance | Bore ±0.005 mm, taper ±0.01 mm, concentricity ≤0.008 mm |
| Surface finish | Ra 0.4 µm on gripping surfaces, Ra 0.8 µm elsewhere |
| Machining process | CNC turning, internal grinding, wire-cut slotting |
| Heat treatment | Carburizing or through-hardening, then tempering |
| Inspection | CMM report per batch, hardness test, taper gauge check |
| Batch size | 1 to 5,000 pieces |
| Lead time | 10 days for prototypes, 15 days for production runs |
| Packaging | Anti-rust oil, individual foam slots, export carton |
We use CNC lathes and internal grinders with in-process gauging. Slots are wire-cut for consistent width and zero burr. Each collet is matched to a master taper gauge before shipment.
## Three Reasons Buyers Send Us Their Drawings 1. Batch-traceable quality Every heat number and batch is recorded. If you need to trace a part back to its steel coil, we can do that in minutes. We keep records for five years.
2. Inspection report per batch You get a full report with each shipment. It includes bore diameter, taper angle, concentricity, hardness, and surface finish. No generic certificates. Real numbers from real measurements.
3. One factory for CNC + stamping + springs + heat sinks Your collet set might need a spring, a stamped retainer, or a heat sink for the spindle. We make all of them under one roof. Fewer suppliers, fewer handoffs, fewer tolerance stack-ups. This is precision manufacturing without the logistics headache.
## Where These Parts Are Used Auto lathe collet sets are not shelf parts. They are used where cycle time and repeatability matter.
Buyers in automotive, aerospace, and medical device manufacturing use these. They send drawings because they need a collet that holds a specific tolerance under 6,000 RPM.
## Questions Buyers Ask Before Ordering Q: What is your MOQ? A: No MOQ. We make one prototype or a full production run. The price per piece drops at 50, 200, and 500 pieces, but we do not turn away a single-piece order.
Q: How do you guarantee tolerance and quality? A: We grind the bore and taper after heat treatment. Each collet is checked with a calibrated air gauge and a master taper. The CMM report is included with the shipment. If a part is out of spec, we replace it at no cost.
Q: What is your lead time for a custom set? A: 10 working days for a prototype set, 15 days for production. If you need faster, we can split the order and ship the first batch in 7 days. We will tell you the exact date before you pay.
Q: Can you provide material certificates? A: Yes. We supply mill certificates for the steel, heat treatment reports, and our own inspection data. All documents are in English and traceable to the batch.
## Send Your Drawing Stop guessing if a standard collet will work. Send us your drawing and get a firm quote in 12 hours.
We reply with a price, lead time, and a technical review of any potential issues. No obligation.
Email: sc@bquq.com WhatsApp: +86 13713157787
Custom CNC collet chuck, made in China, with no MOQ and verified quality. Send the file. We will handle the rest.
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.
| 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 |
