OpeningYour 5C collet set starts as a drawing, not a stock number. We machine each collet to your exact bore diameter, step, and slot geometry. Before shipment, every piece is verified on a CMM and ma
Your 5C collet set starts as a drawing, not a stock number. We machine each collet to your exact bore diameter, step, and slot geometry. Before shipment, every piece is verified on a CMM and matched against your print.
This is precision manufacturing for lathe work that cannot tolerate runout.
| Parameter | Value |
|---|---|
| Material | 8620 (case-hardened to 58–62 HRC) or 12L14 (as-machined) |
| Bore tolerance | ±0.005 mm (0.0002 in) |
| Concentricity (TIR) | ≤0.010 mm at nose, ≤0.015 mm at 25 mm depth |
| Surface finish | Ra 0.4 µm on bore, Ra 0.8 µm on OD |
| Slots | Ground, width ±0.02 mm, no burr |
| Hardness | 58–62 HRC case depth 0.3–0.5 mm |
| Machines | 5-axis CNC lathes, cylindrical grinders, wire EDM for slots |
| Inspection | 100% CMM check on bore, TIR, and slot width |
| Batch size | 1 to 5,000 pieces, same process control |
| Marking | Laser-etched size, batch code, date |
We do not use cast blanks. Each collet is turned from solid bar, ground on the OD and bore, then wire-cut for the expansion slots. This gives you repeatable clamping force across the entire set.
1. Batch-traceable quality. Every collet gets a batch code. That code links to the heat number, machine operator, and inspection data. If a problem shows up on your line, you can trace it back to the exact bar stock and shift. No guesswork.
2. Inspection report per batch. You get a PDF with actual measured values for every critical dimension—bore ID, TIR, slot width, hardness. Not a generic certificate. Real numbers from a calibrated CMM, signed by our QC lead.
3. One factory for CNC + stamping + spring + heatsink. Your collet chuck might need a stamped retainer ring, a spring for the drawbar, or a heatsink for the spindle motor. We make all of those in-house. One purchase order, one shipping date, one quality standard. You skip the headache of coordinating three suppliers.
Custom 5C collets are not just for manual lathes. They go into:
In each case, the collet is the last thing between the spindle and the part. If it is off, nothing else matters.
Looking for a different part? We also machine Custom CNC Collet Chuck 5C Precision Lathe Tooling Made in China in the same Dongguan factory.
Q: What is your MOQ for a custom 5C collet set? A: No MOQ. Order one collet for a trial, or a full set of 20. The unit price drops with quantity, but the tolerance and inspection are identical.
Q: How do you guarantee tolerance and quality? A: We hold ±0.005 mm on bore ID. Every collet is measured on a CMM, and we send you the report. If a collet fails your incoming inspection, we replace it at no cost—no return shipping needed.
Q: What is your lead time for a custom size? A: 7–12 days for standard 5C profiles (round, hex, square). Custom slot patterns or special step bores take 15 days. We ship via DHL or FedEx, door-to-door.
Q: Can you provide material certificates? A: Yes. We supply EN 10204 3.1 mill certificates for the bar stock, plus our own hardness and case-depth reports. All from the batch code on the collet.
Send us your 5C collet drawing—PDF, STEP, or even a hand sketch with dimensions. We will reply with a firm quote in 12 hours.
We are a 20-year precision manufacturing factory in Dongguan, China. CNC machining, stamping, springs, and heatsinks under one roof. No MOQ, no minimum order value, no runaround. Just a quote you can build a cost model on.
| 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 |
