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
Custom CNC Collet Chuck Auto Lathe Hex Bore Collet Set 15-52mm | BQUQ
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
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
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.
Tolerance: ±0.005 mm on bore and taper
Lead time: 10–15 working days for standard sets
No MOQ: order one set or fifty
Material: 20CrMnTi or 8620, case-hardened to 58–62 HRC
Inspection report included with every batch
Specifications
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.
Three Reasons Buyers Send Us Their Drawings
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.
Where These Parts Are Used
Swiss-type automatic lathes – holding hex bar stock for screw machine parts, where round collets would let the hex twist.
CNC turning centers with pull-back collet chucks – for second-operation work on hex nuts, fittings, and valve components.
Hydraulic and pneumatic collet chucks – where the hex bore needs to align with the spindle centerline within microns.
Automotive fuel system components – hex body fittings that must not be scored during machining.
Medical device manufacturing – small hex implants and instruments where surface finish and repeatability are critical.
Aerospace fasteners – hex bolts and sockets that need a secure grip without deformation at high spindle speeds.
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.
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.
Send Your Drawing
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.
