OpeningYour drawing defines the part. We build it exactly to that geometry. Every ER collet chuck and tool kit component is machined, heat-treated, and ground to your specified tolerances. Before ship
Your drawing defines the part. We build it exactly to that geometry. Every ER collet chuck and tool kit component is machined, heat-treated, and ground to your specified tolerances. Before shipment, each unit is 100% inspected for runout, taper angle, and hardness. We do not ship guesswork.
At a glance: Tolerance ±0.005 mm on critical diameters, surface finish Ra 0.4 µm on taper seats, lead time 15–20 working days after drawing approval, no MOQ.
| Parameter | Value | Notes |
|---|---|---|
| Material options | 20CrMnTi, 40Cr, 9Cr18, 65Mn | Carburized or through-hardened per application |
| Hardness | 58–62 HRC (case), 40–45 HRC (core) | For collet chuck body and nut |
| Machining process | CNC turning, 5-axis milling, ID/OD grinding | Grinding after heat treatment for taper accuracy |
| Taper accuracy | AT3 or better | For ER11–ER40 collet seats |
| Runout (TIR) | ≤0.005 mm at nose, ≤0.010 mm at 100 mm | Measured with precision test bar |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on shank | Ground and lapped surfaces |
| Thread type | Metric fine (M12×1.5 to M60×2.0) or custom | For pull-back or push-out actuation |
| Coatings | TiN, TiAlN, black oxide, or none | Optional, per your drawing note |
| Batch size | 1 piece to 5000 pieces | No MOQ, same process control |
| Inspection | CMM, hardness tester, runout gauge | Report per batch, photos included |
| Lead time | 15–20 days for standard kits | Faster for existing tooling |
We run the full process in one factory: CNC turning, milling, heat treatment, grinding, and final assembly of the tool kit (collet chuck body, collets, nuts, and wrenches). No subcontracted steps, no hidden variation.
1. Batch-traceable quality. Each heat number and material lot is recorded. If you need to trace a part back to its steel coil, we can do that. We keep records for 5 years. For aerospace or medical buyers, this is non-negotiable.
2. Inspection report per batch. You get a dimensional report for every batch, not just a sample. We measure taper angle, runout, hardness, and thread pitch. If a dimension is out, we flag it before shipping, not after you mount it on a spindle.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck kit might need a spring washer, a stamped retainer plate, or a heat sink for a high-speed application. We make all of them under one roof. Fewer vendors, fewer logistics delays, one responsible party.
Custom CNC collet chucks are not shelf items. They go into machines where standard ER chucks fail.
If you are making chips and your current holder vibrates, drifts, or wears unevenly, send us the drawing. We will fix the geometry.
Looking for a different part? We also machine Custom CNC Machined ER16 Spring Collet Chuck | Precision Manufacturing in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We accept one-piece prototypes and 5000-piece production runs. The unit price drops with quantity, but the first article gets the same inspection as the last.
Q: How do you guarantee tolerance and quality? A: We grind the taper after heat treatment, not before. We measure every part with a CMM and a calibrated runout gauge. The inspection report is included in the shipment. If you find a bad part, we replace it at no cost, including freight.
Q: What is your lead time for a custom ER collet chuck kit? A: Standard kits (ER20–ER32) ship in 15 days. Complex designs with special threads or coatings take 20 days. Tooling for repeat orders is kept on file, so reorders are faster.
Q: Can you provide material certificates and heat treatment reports? A: Yes. We supply mill certificates for the raw steel and a hardness report for every batch. Third-party testing (SGS, BV) is available at your cost.
Send us your PDF or STEP file. We reply with a firm quote in 12 hours—not a range, a number. Include your target quantity, material, and any critical tolerance callouts. We will confirm what we can hold and what we cannot.
Email: sc@bquq.com WhatsApp: +86 13713157787
Precision manufacturing, made in China, no MOQ. Your custom CNC collet chuck kit, 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 |
