OpeningYour drawing defines the part. We machine it.This is a 25-type hex bore spring collet for auto lathes and CNC collet chucks. We make it to your exact dimensions, from your material choice, with
Your drawing defines the part. We machine it.
This is a 25-type hex bore spring collet for auto lathes and CNC collet chucks. We make it to your exact dimensions, from your material choice, with your tolerance stack. Every piece is verified before shipment. No exceptions.
We are a precision manufacturing factory in Dongguan, China. Twenty years of CNC machining, stamping, springs, and heat sinks under one roof. You send the drawing. We return a part that fits your chuck and holds your workpiece.
| Parameter | Value |
|---|---|
| Type | 25-type spring collet, hex bore |
| Bore shape | Hexagonal, custom per drawing |
| Bore size range | 3 mm – 25 mm (hex across flats) |
| Outer diameter | 25.4 mm (standard 25-type) |
| Length | 60 mm – 80 mm, per drawing |
| Material options | 65Mn spring steel, 60Si2Mn, 9Cr18 stainless, or customer-specified |
| Hardness | 45–52 HRC after heat treatment |
| Surface finish | Ra 0.4 µm on bore, Ra 0.8 µm on OD |
| Tolerance | ±0.005 mm on bore, ±0.01 mm on length |
| Heat treatment | Quenched and tempered, optional nitriding |
| Keyway/slot | Precision wire-cut, width ±0.02 mm |
| Inspection | 100% dimensional check, batch report |
| Batch size | 1 – 100,000 pieces |
| Lead time | 7 days for 1–50 pcs, 15 days for larger runs |
We use CNC turning and grinding for the OD and bore, then wire-cut the slots. The hex bore is broached or wire-cut depending on size and tolerance. Every collet is stress-relieved after machining to prevent distortion during use.
1. Batch-traceable quality Each batch gets a unique number. We record material heat number, machine used, operator, and inspection results. If a problem appears in your production, we trace it back to the exact melt and shift. No guesswork.
2. Inspection report per batch You receive a dimensional report with every shipment. It lists bore size, hex geometry, OD, length, hardness, and surface finish. Measured values, not nominal values. Your QC team can verify against our numbers in minutes.
3. One factory for CNC + stamping + springs + heat sinks Your collet chuck might need a stamped retainer, a spring, or a heat sink in the same assembly. We make all of them. One purchase order, one quality system, one shipping point. Fewer suppliers, fewer delays, fewer arguments about who is responsible.
The 25-type hex bore spring collet is common in automatic lathes and CNC collet chucks. Typical applications:
The hex bore locks the workpiece orientation. No slippage, no rotation, no re-indexing. That is why buyers specify a custom hex collet instead of a round bore with a set screw.
Looking for a different part? We also machine Custom CNC Machined Auto Lathe 36 Type External Thread Extended Collet in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We make one prototype for your fit test, or a thousand pieces for production. The unit price drops with quantity, but we do not force you to over-order.
Q: How do you guarantee tolerance and quality? A: We machine to ±0.005 mm on the bore and hex. Every collet is measured with a CMM or bore gauge. The batch report shows actual values. If anything is out of spec, we replace it at no cost.
Q: What is your lead time? A: Prototypes ship in 7–12 days. Production runs of 100+ pieces ship in 15–20 days. For urgent orders, we can expedite to 5 days for a small surcharge.
Q: Do you provide material certificates? A: Yes. We supply mill certificates for the raw material, heat treatment reports, and hardness test results. All documents are in English and traceable to the batch number.
Send us your PDF or STEP file. We will check the geometry, confirm the material, and give you a firm quote within 12 hours. No obligation, no hidden costs.
Email: sc@bquq.com WhatsApp: +86 13713157787
Custom CNC collet chuck, made in China, with no MOQ and verified quality. Your drawing is the starting point. We handle the rest.
| 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 |
