OpeningThis is a 36-type extended collet with a square bore, machined to your exact drawing. We do not stock generic blanks and modify them. We start from raw bar stock and cut every feature—bore shap
This is a 36-type extended collet with a square bore, machined to your exact drawing. We do not stock generic blanks and modify them. We start from raw bar stock and cut every feature—bore shape, taper angle, slot width, and reliefs—according to your print.
Every collet is verified before shipment. We check the taper with a gauge, the square bore with a pin, and the slot geometry with optical measurement. If it does not match your drawing, it does not ship.
At a glance: Tolerance ±0.005 mm on bore and taper, lead time 7–12 working days, no MOQ, material certs included.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi, 40Cr, 65Mn, 9SiCr, or customer-specified alloy steel |
| Hardness | 58–62 HRC (through-hardened) or 58–62 HRC case-hardened on request |
| Bore shape | Square, hex, or custom polygon (per your drawing) |
| Bore tolerance | ±0.005 mm |
| Taper angle tolerance | ±0.01° |
| Concentricity | ≤0.008 mm TIR |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on bore |
| Slot width | 0.3–3.0 mm, EDM wire-cut |
| Keyway / drive slot | Optional, per drawing |
| Process | CNC turning, CNC milling, wire EDM, heat treatment, centerless grinding |
| Inspection | 100% dimensional check, CMM report per batch |
| Batch size | 1 piece to 10,000 pieces, no MOQ |
| Lead time | 7 working days for prototypes, 12 working days for production |
| Country of origin | Made in China, Dongguan factory |
1. Batch-traceable quality. Every heat lot is assigned a unique code. We record material certs, heat treatment curves, and final inspection data against that code. If a problem appears in your assembly line six months from now, we can pull the full production record for that batch within one hour. No guesswork.
2. Inspection report per batch. You get a dimensional report for every batch, not just a sampling. We measure bore size, taper angle, concentricity, and hardness on each piece. The report is signed by our QC engineer and sent with the shipment. Your incoming inspection takes minutes, not hours.
3. One factory for CNC, stamping, springs, and heat sinks. We run four production lines under one roof: CNC machining, metal stamping, springs, and heat sinks. If your collet chuck assembly also needs a stamped retainer, a compression spring, or a heat sink for the drive unit, you send one drawing package and deal with one quality team. Fewer suppliers, fewer interfaces, fewer delays.
The 36-type extended collet with a square bore is a workholding component for automatic lathes and CNC Swiss-type machines. The square bore grips square or hex stock without marring the corners, and the extended length reaches deeper into the spindle for longer bar feed-out.
Typical applications include:
In all these cases, the collet is the last mechanical link between the spindle and the workpiece. If it does not grip true, nothing downstream is true.
Looking for a different part? We also machine Custom CNC Collet Chuck Manufacturing | Precision Auto Lathe Collets in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We machine one piece for prototyping or 10,000 pieces for production. The unit price drops with quantity, but we do not force you to buy more than you need.
Q: What tolerance can you hold on the square bore and taper? A: Standard is ±0.005 mm on bore and ±0.01° on taper angle. For special applications, we can hold ±0.003 mm on the bore and ±0.005° on the taper, but this requires a material that does not move during heat treatment. We will tell you if your drawing is not achievable before we quote.
Q: What is your lead time for a custom CNC collet chuck? A: 7 working days for a prototype or small batch. 12 working days for production quantities. If you need it faster, we can split the batch and ship the first part of the order early. We do not quote lead times we cannot meet.
Q: Do you provide material certificates and heat treatment reports? A: Yes. Every shipment includes a mill certificate for the raw material and a heat treatment report showing the hardness and case depth. If you need a full PPAP or a third-party inspection, we can arrange that at cost.
Send us your drawing for a firm quote. We reply within 12 hours with pricing, lead time, and a technical review of your print. If we see a potential issue with the bore tolerance or the material, we tell you before you order.
Email: sc@bquq.com WhatsApp: +86 13713157787
Precision manufacturing, made in China, no MOQ. Your drawing, 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 |
