OpeningYou need a collet that grips true on the hex, not just the corners. We machine each hex bore collet to your exact drawing—internal profile, pullback angle, and slot geometry. Every set is verif
You need a collet that grips true on the hex, not just the corners. We machine each hex bore collet to your exact drawing—internal profile, pullback angle, and slot geometry. Every set is verified with a CMM before shipment. No guesswork, no rework on your spindle.
| Parameter | Value |
|---|---|
| Bore range | 15 mm to 52 mm (hex across flats) |
| Collet taper | 16°, 20°, or per your chuck spec |
| Material | 20CrMnTi, 8620, or 4140 (per drawing) |
| Hardness | 58–62 HRC case-hardened, 1.0–1.5 mm depth |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on bore |
| Slot type | Slotted, unslotted, or spring-loaded (per drawing) |
| Process | CNC turning, CNC milling, wire EDM slotting |
| Tolerance | ±0.005 mm on bore and taper, concentricity 0.003 mm |
| Batch size | 1 to 500+ pieces |
| Inspection | 100% taper check, CMM report per batch |
| Lead time | 10–15 days standard, 7 days for rush |
| Marking | Laser etched part number and batch code |
We run these on Citizen and Star Swiss-type lathes for the body, then finish the hex bore with wire EDM. This gives a clean, burr-free internal profile that holds hex stock without marking it. For sets, we match each collet to its sleeve and test fit with a master hex bar before packing.
1. Batch-traceable quality. Every collet gets a unique batch code. We record heat treat curves, grinding pass counts, and final inspection data against that code. If a problem shows up in your line, we trace it to the exact furnace load and operator shift. You get a PDF report with each shipment, not just a box of parts.
2. Inspection report per batch. We measure taper angle, bore size, concentricity, and hardness on every piece in the batch—not a sampling. The report lists each collet’s actual values against your drawing tolerances. If a value is out, that collet is scrapped, not shipped. You can audit our numbers with your own CMM; they will match.
3. One factory for CNC, stamping, springs, and heat sinks. Your collet chuck might need a spring pusher, a stamped retainer plate, or a heat sink for the draw tube. We make all of those in the same building. One purchase order, one quality system, one shipping date. No coordinating three suppliers across time zones. This is precision manufacturing made in China without the usual friction.
The 15–52 mm range covers most common hex sizes from M10 to M36 stock. If you need outside that range, send the drawing—we’ll make it.
Looking for a different part? We also machine Custom CNC Collet Chuck 32 Type Hex Bar Stock Made in China in the same Dongguan factory.
Q: Is there a minimum order quantity? A: No. We make one collet or a full set. The unit price is higher for single pieces, but the quality process is identical. Many buyers order one set to test, then scale up once it runs well.
Q: What tolerance can you hold on the hex bore? A: ±0.005 mm on the across-flats dimension, with concentricity to the taper at 0.003 mm. We measure with a CMM and a calibrated hex master. If your drawing calls for tighter, we’ll quote it—but 0.005 mm is our standard for production.
Q: What is your lead time for a custom set? A: 10–15 working days from drawing approval. This includes material sourcing, heat treat, grinding, and final inspection. For a rush order, we can do 7 days at a 15% surcharge. We ship via DHL or FedEx, door to door.
Q: Can you provide material certificates? A: Yes. We supply mill certificates for the raw material, heat treat reports with hardness curves, and a dimensional inspection report per batch. All documents are in English and stamped by our QC manager. If your customer needs PPAP level 3, we can do that too.
Email your PDF or STEP file to sc@bquq.com. We reply with a firm quote in 12 hours—price, lead time, and tolerance review. If you want a quick check on feasibility, send the drawing and we’ll call you back the same day. WhatsApp us at +86 13713157787 for a faster response during China business hours.
No MOQ. No minimum order value. Just send the drawing and get a straight answer.
| 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 |
