OpeningYour ER16 spring collet is a wear part. It holds the tool, and the tool holds the tolerance. If the collet is off, the part is off. We machine ER16 collets to your exact drawing, not to a gener
Your ER16 spring collet is a wear part. It holds the tool, and the tool holds the tolerance. If the collet is off, the part is off. We machine ER16 collets to your exact drawing, not to a generic catalog spec. Every collet is inspected before shipment. We do not ship borderline parts.
At a glance: ER16 collet, 0.005 mm TIR (runout) on the bore, 45 HRC hardness after heat treatment, 7–10 working days lead time, no MOQ. One piece or one thousand, same process.
We are a precision manufacturing factory in Dongguan, China. Twenty years of CNC machining experience. Our customers send drawings, not vague requests. We return verified parts.
| Parameter | Value |
|---|---|
| Material | 65Mn spring steel, 20CrMnTi, or per your drawing |
| Hardness | 45–50 HRC (through-hardened), surface oxidation black |
| Bore tolerance | H4 (0.005 mm TIR max) |
| Outer diameter tolerance | ±0.01 mm |
| Slit width | 0.8 mm ±0.05 mm, laser-cut, no burr |
| Surface finish | Ra 0.4 µm on bore, Ra 0.8 µm on taper |
| Taper angle | 8° per side (ER standard) or per your spec |
| Process | CNC turning, CNC milling, laser slit cutting, heat treatment, centerless grinding |
| Inspection | 100% dimensional check, batch report with CMM data |
| Batch size | 1–10,000 pcs, no setup penalty for small lots |
| Lead time | 7 days for standard ER16, 10 days for custom geometry |
| Country of origin | Made in China, Dongguan factory |
We use centerless grinding for the outer taper. This is not a lathe-only operation. Grinding gives you repeatable concentricity across a batch. Laser cutting for the slits ensures the gap is consistent, which directly affects clamping force.
1. Batch-traceable quality. Each heat treatment batch gets a unique code. We record material lot, machine operator, and inspection results. If you have a failure in the field, we can trace it back to the exact batch and process parameters. You get a traceability sheet with every shipment.
2. Inspection report per batch. We do not send a generic certificate. You receive a dimensional report with actual measured values for bore diameter, taper angle, hardness, and runout. CMM data is included for critical features. If a dimension is out of spec, we reject the part before it reaches you.
3. One factory for CNC + stamping + springs + heat sinks. Your collet is not an isolated part. It sits in a chuck, which sits in a spindle, which sits in a machine that also needs springs, stamped retainers, or heat sinks. We make all of these in-house. You send one drawing package, we coordinate the entire supply chain. Fewer vendors, less shipping, faster root-cause analysis.
ER16 collets are not just for hobby spindles. We supply them for:
If your application involves a rotating tool or workpiece, the collet is the weakest link. We make that link stronger.
Looking for a different part? We also machine Custom CNC Machined ER32 Collet Nut with Spanner Wrench Tooling in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We machine one piece for prototyping and scale to 10,000 pieces without changing the process. The per-piece price drops with quantity, but the first piece is made to the same standard as the last.
Q: How do you guarantee tolerance and quality? A: We use CMM inspection on every batch, not just sample checks. Bore runout is verified on a precision mandrel. Hardness is tested on a Rockwell tester. We send the report with the parts. If you find a defect, we replace the batch at no cost.
Q: What is your lead time? A: Standard ER16 collets ship in 7 working days. Custom geometry with non-standard tapers or materials takes 10–12 days. For urgent orders, we can split the batch – ship what is ready first, then the rest.
Q: Do you provide material certificates? A: Yes. We provide mill certificates for the raw material, heat treatment reports, and a declaration of conformity. All materials are traceable to the original supplier. If you need third-party inspection, we coordinate with SGS or TÜV at your cost.
Send us your ER16 collet drawing or a sample part. We will review the geometry, material, and tolerance. You get a firm quote within 12 hours. No vague estimates, no hidden setup fees.
Email: sc@bquq.com WhatsApp: +86 13713157787
We are a precision manufacturing factory in Dongguan, China. Custom CNC collet chuck, made in China, no MOQ. Send the drawing, get the quote, receive the parts.
| 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 |
