OpeningYour drawing defines the part. We machine it, verify it, and ship it. Every ER32 collet chuck is checked for runout and taper accuracy before it leaves our Dongguan factory. No surprises.At a g
Your drawing defines the part. We machine it, verify it, and ship it. Every ER32 collet chuck is checked for runout and taper accuracy before it leaves our Dongguan factory. No surprises.
At a glance: ±0.005 mm concentricity on the taper, 0.008 mm TIR at the nose, 15-day standard lead time, no MOQ. Made in China with full material traceability.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi (case-hardened), 40CrMo, 42CrMo, S136, 9Cr18 |
| Hardness | 58–62 HRC (case-hardened), 48–52 HRC (through-hardened) |
| Taper accuracy | AT3 or better per DIN 6499 |
| Concentricity (taper to shank) | ≤ 0.005 mm |
| Runout at nose (with test bar) | ≤ 0.008 mm |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on body |
| Coating options | Black oxide, TiN, TiAlN, or none (as drawn) |
| Machining process | CNC turning, CNC milling, internal grinding, cylindrical grinding |
| Inspection equipment | CMM (Zeiss), Taylor Hobson roundness tester, hardness tester |
| Batch size | 1 piece to 10,000 pieces accepted |
| Lead time | 7 days for prototypes, 15 days for standard batches |
| Documentation | Material certs, inspection report per batch, dimensional report |
We grind the taper after heat treatment. That is non-negotiable. It is the only way to hold the runout numbers above. Threads are cut, not rolled, for better concentricity on the collet nut.
1. Batch-traceable quality. Every heat lot is tagged. Every part gets a unique serial number if you need it. We keep records for 10 years. If a problem shows up in your shop, we can trace it back to the exact batch, machine, and operator.
2. Inspection report per batch. You get a full dimensional report with each shipment. Not a generic certificate — actual measured values for taper angle, runout, hardness, and surface finish. We use a Zeiss CMM and a Taylor Hobson roundness tester. The report is signed by our QC lead and sent with the parts.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck is not an isolated part. You may need a spring for the nut, a stamped retainer, or a heat sink for the spindle motor. We make all of them under one roof. Fewer suppliers, fewer logistics headaches, one responsible party.
ER32 collet chucks are standard toolholders for CNC milling and drilling centers. They hold end mills, drill bits, and reamers from 2 mm to 20 mm shank diameter. Common applications include:
The ER32 system is a global standard. If you are already using ER32 collets, our chuck will fit your existing nuts and wrenches. We also make the matching spanner wrench — flat or hook type, as per your drawing.
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 single-piece orders for prototypes and small batches. The price per piece is higher for one-off parts, but the quality and inspection are identical to a 10,000-piece run.
Q: How do you guarantee tolerance and quality? A: We grind the taper after heat treatment, not before. That is the critical step. We then measure every part with a CMM and a roundness tester. The inspection report is included with the shipment. If any dimension is out of spec, we remake the part at no cost.
Q: What is your lead time? A: 7 days for prototypes (1–5 pieces). 15 days for standard batches up to 1,000 pieces. Larger orders are quoted individually. We can expedite for an additional fee if your line is down.
Q: Can you provide material certificates? A: Yes. Every batch comes with a mill certificate for the raw material, plus our own hardness and chemical composition test results. We can also provide third-party inspection (SGS, TÜV) at your cost.
Send us your drawing in PDF, STEP, or IGES format. We will review the material, tolerances, and quantity. You get a firm quote within 12 hours. No hidden costs, no vague promises.
Email: sc@bquq.com WhatsApp: +86 13713157787
Precision manufacturing is our only business. Let us quote your custom CNC collet chuck today.
| 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 |
