OpeningYour drawing defines the part. We machine it. Every ER40 spring collet chuck is made to your exact geometry, heat treatment, and runout spec. Before shipment, each unit is checked on a calibrat
Your drawing defines the part. We machine it. Every ER40 spring collet chuck is made to your exact geometry, heat treatment, and runout spec. Before shipment, each unit is checked on a calibrated test arbor. Runout is verified, not assumed.
We are a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining experience. You send the drawing. We return a firm quote and a part that fits your spindle.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi, 8620, 42CrMo, 9Cr18 |
| Hardness | Case-hardened 58–62 HRC, core 30–40 HRC |
| Taper accuracy | AT3 per DIN 55026 or better |
| Runout (TIR) | ≤ 0.008 mm at nose, ≤ 0.005 mm at 10 mm from nose |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on OD |
| Keyway / drive slots | Milled or wire-cut, ± 0.01 mm |
| Threads | M16, M20, or custom per drawing |
| Slots | 6-slot or 8-slot, width ± 0.02 mm |
| Balancing | G2.5 or better for high-speed use |
| Process | CNC turning, grinding, wire EDM, heat treatment |
| Inspection | 100% dimensional check, CMM report per batch |
| Batch size | 1 to 5,000 pieces, no MOQ |
| Lead time | 15 days for prototypes, 20 days for production |
All custom CNC collet chucks are machined from solid bar or forged blank, then ground on the taper and bore. Heat treatment is done in-house with batch tracking. Hardness is tested on every batch, not every tenth part.
1. Batch-traceable quality. Each heat lot gets a unique code. We record material cert, heat treatment curve, and final inspection data. If a problem appears in your line, we trace it to the exact batch and date. No guesswork.
2. Inspection report per batch. You get a dimensional report for every batch, not a sample. CMM data for taper angle, runout, and slot width. Hardness test results. Material certs from the mill. This is standard, not an extra-cost option.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck is not the only part you buy. If your assembly also needs a spring, a stamped retainer, or a heat sink, we make them under one roof. Fewer suppliers, fewer logistics headaches, one quality standard.
ER40 spring collet chucks are not just for toolholders. Our customers use them in:
In every case, the chuck is the last thing between your spindle and your part. If it is off by a micron, your part is off by a micron. We do not let that happen.
Looking for a different part? We also machine Custom CNC Machined ER32 Collet Nut with Spanner Wrench Tooling in the same Dongguan factory.
Q: Is there really no MOQ? A: Yes, no MOQ. We machine one prototype for testing or 5,000 pieces for production. The unit price for one piece is higher, but the quality standard is identical.
Q: What tolerance and runout can you guarantee? A: Standard is 0.005 mm on taper and 0.008 mm TIR at the nose. For high-precision jobs, we can hold 0.003 mm on taper and 0.005 mm TIR. This is verified on a test arbor before shipment.
Q: What is the lead time for a custom collet chuck? A: 15 working days for prototypes, 20 working days for production batches. If you need faster, we can split the batch and ship the first part in 10 days.
Q: Do you provide material certificates? A: Yes. Every batch comes with mill test certificates, heat treatment reports, and hardness test data. We keep records for 5 years.
Send us your PDF, STEP, or IGES file. We will check the geometry, confirm the material, and give you a firm quote within 12 hours. No vague estimates. No hidden costs.
Email: sc@bquq.com WhatsApp: +86 13713157787
Your custom CNC collet chuck, made in China, machined to your drawing, verified before shipment. No MOQ, no excuses.
| 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 |
