OpeningYour part. Your drawing. Our machines. That is how we work at BQUQ.We machine the CNC Auto Lathe 42 Type Round Bore Spring Collet Chuck to your exact geometry. Not a catalog copy. Not a modifie
Your part. Your drawing. Our machines. That is how we work at BQUQ.
We machine the CNC Auto Lathe 42 Type Round Bore Spring Collet Chuck to your exact geometry. Not a catalog copy. Not a modified standard. Your drawing becomes the master. Every dimension is verified before shipment. We use CMM inspection and a hard gauge for the bore and taper.
At a glance: Tolerance ±0.005 mm on the bore, concentricity ≤0.01 mm TIR, lead time 15-20 working days, no MOQ. One piece or one thousand, the price per unit stays fair. We are a precision manufacturing factory in Dongguan, China, with 20 years of experience on CNC lathes and grinding machines.
We do not outsource critical steps. The collet chuck body, the slots, and the spring tempering are all done in-house. This gives us control over the final fit and the clamping force repeatability.
| Parameter | Value |
|---|---|
| Material options | 65Mn spring steel, 60Si2MnA, 42CrMo (hardened), or per your spec |
| Hardness (spring collet) | HRC 42-48 after heat treatment |
| Hardness (body) | HRC 38-42 |
| Bore diameter range | Ø3 mm to Ø42 mm (round bore type) |
| Concentricity (bore to taper) | ≤0.01 mm TIR |
| Tolerance on bore diameter | +0.005 / -0.005 mm |
| Surface finish (bore) | Ra 0.4 µm (ground) |
| Surface finish (slots) | Ra 1.6 µm (wire-cut, no burr) |
| Slots | 3-slot or 6-slot design, laser-cut or wire-cut |
| Taper angle | 16° or 20° per your machine spindle |
| Keyway / drive slots | Per DIN 6343 or your drawing |
| Batch size | 1 piece to 10,000 pieces, no MOQ |
| Inspection | 100% dimensional check on critical features, CMM report included |
| Lead time | 15 working days for prototypes, 20 days for production batches |
We use CNC turning centers for the body, internal grinding for the bore, and wire EDM for the slots. The spring fingers are heat-treated in a vacuum furnace to prevent scale and decarburization. This is how we keep the clamping force consistent across a batch.
1. Batch-traceable quality. Every collet chuck gets a unique serial number. We record the heat treatment lot, the grinding wheel used, and the inspector's name. If you have a problem on your line, we can trace it back to the exact batch and the exact machine. You get a full inspection report per batch, not a generic certificate.
2. Inspection report per batch. We do not just say "it's good." We send you the data. For every batch, you receive a dimensional report with actual measured values for the bore, the taper, and the concentricity. We also include a hardness test report. You can verify the part before you even put it on your spindle.
3. One factory for CNC + stamping + spring + heatsink. Your collet chuck is not an island. It works with springs, washers, and sometimes a stamped retainer plate. We make all of those in the same building. You send us one drawing package, we coordinate the whole assembly. Fewer suppliers, fewer logistics headaches, one responsible party.
The Auto Lathe 42 Type Round Bore Spring Collet Chuck is a workhorse in high-volume turning shops. You will find it in:
The 42 type refers to the maximum bar capacity. It fits standard 42 mm spindle liners. The round bore design is for gripping round stock only. If you need hex or square bores, we can machine those too, but the round type is the most common.
Looking for a different part? We also machine Custom CNC Collet Chuck Auto Lathe Internal Expanding Precision Made in China in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We machine one piece for prototypes and small runs. The unit price for one piece is higher due to setup time, but we do not force you to buy 100 pieces to test a design.
Q: How do you guarantee tolerance and quality? A: We grind the bore after heat treatment. That is the only way to hold ±0.005 mm. We inspect 100% of the critical dimensions on a CMM. The inspection report is included with the shipment. If a part fails your incoming inspection, we replace it at no cost.
Q: What is the lead time for a custom CNC collet chuck? A: 15 working days for a prototype after drawing approval. Production batches of 100+ pieces take 20 working days. If you need it faster, we can expedite for an additional charge, but we will not skip inspection to save time.
Q: Do you provide material certificates and heat treatment reports? A: Yes. We provide a mill certificate for the raw material (65Mn or your specified grade) and a heat treatment report with the actual hardness values per batch. All documents are in English and can be notarized if required.
We are a made-in-China precision manufacturing partner that answers fast.
Send us your 2D drawing (PDF or DWG) and your 3D model (STEP or IGES). We will check the geometry, the tolerances, and the material spec. You will receive a firm quote within 12 hours. No hidden costs, no vague estimates.
Email: sc@bquq.com WhatsApp: +86 13713157787
We speak engineer. We machine to your drawing. Let's get your collet chuck into production.
| 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 |
