OpeningYour drawing drives our process. We machine the ER25 spring collet chuck with tap to your exact geometry, not a stock approximation. Every taper, every thread, every relief angle is verified be
Your drawing drives our process. We machine the ER25 spring collet chuck with tap to your exact geometry, not a stock approximation. Every taper, every thread, every relief angle is verified before shipment.
We are a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining experience. Your custom CNC collet chuck is made on our own machines, inspected on our own CMM, and shipped with a report. No middlemen. No guesswork.
| Parameter | Value |
|---|---|
| Material | 20CrMnTi, 8620, or 4140 steel (per your spec) |
| Hardness | 58–62 HRC case-hardened, core 30–35 HRC |
| Taper accuracy | AT3 per DIN 6499 |
| Concentricity | ≤0.005 mm at nose, ≤0.010 mm at 100 mm |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on body |
| Thread for tap | M3–M12 standard, custom pitch available |
| Process | CNC turning, CNC milling, internal grinding, heat treatment |
| Inspection | 100% taper gauge check, CMM report per batch |
| Batch size | 1–50,000 pieces, no MOQ |
| Lead time | 7 days for sample, 15 days for 500 pcs |
We use hardened and ground collets, not turned-only blanks. The tap drive section is machined with a square or hexagonal pocket, matched to your tap shank. Runout is held below 0.01 mm to protect tap life and thread quality.
1. Batch-traceable quality. Each heat of steel is logged. Each batch gets a unique number. If a problem appears in your assembly line, we trace it back to the exact machine, operator, and inspection record. No ambiguity.
2. Inspection report per batch. You get a dimensional report with every shipment. Taper angle, concentricity, hardness, and surface finish are all listed. We do not ask you to trust us—we give you data.
3. One factory for CNC + stamping + springs + heat sinks. Your collet chuck is one part of a larger assembly. We also run stamping presses, spring coiling machines, and heat sink lines. Send us the whole BOM. We reduce your supplier list, your shipping cost, and your lead time.
Looking for a different part? We also machine Custom CNC Machined ER20 Collet Chuck with Carbide End Mill in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We machine one piece for prototyping or 50,000 for production. The unit price drops with quantity, but the quality standard does not.
Q: How do you control tolerance and quality? A: We use a CMM for taper and concentricity checks on every batch. Hardness is verified with a Rockwell tester. We also do a 100% functional test with a master collet and a standard tap. The inspection report is included in the shipment.
Q: What is your lead time? A: For a custom ER25 collet chuck with tap, sample delivery is 7–12 days after drawing approval. Production runs of 500 pieces take 15–20 days. Rush orders are possible—call us to confirm.
Q: Can you provide material certificates? A: Yes. We supply mill certificates for the raw steel, heat treatment reports, and a full dimensional inspection report. All documents are in English and can be notarized if needed.
We reply with a firm quote within 12 hours. Send your PDF or STEP file. We will confirm material, tolerance, and price—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. Send it 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 |
