OpeningThis is a CNC machined auto lathe 46 type small bore spring collet, made to your drawing. We do not sell off-the-shelf approximations. We machine the exact bore diameter, ta
Custom CNC Auto Lathe 46 Type Small Bore Spring Collet | BQUQ
OpeningThis is a CNC machined auto lathe 46 type small bore spring collet, made to your drawing. We do not sell off-the-shelf approximations. We machine the exact bore diameter, taper angle, slot widt
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
This is a CNC machined auto lathe 46 type small bore spring collet, made to your drawing. We do not sell off-the-shelf approximations. We machine the exact bore diameter, taper angle, slot width, and relief geometry you specify.
Every collet is verified before shipment. We check bore runout, taper contact, and slot symmetry on a CMM. If it does not match your drawing, it does not ship.
Tolerance: ±0.005 mm on bore and taper
Lead time: 7–12 days for standard materials
No MOQ: order 1 piece or 1,000 pieces
Material: 65Mn, 60Si2MnA, 9SiCr, or 42CrMo
Hardness: 42–48 HRC after heat treatment
Surface finish: Ra 0.4 µm on bore, Ra 0.8 µm elsewhere
This is precision manufacturing for workholding, not a commodity part. Send us your drawing, and we will confirm machinability and price within 12 hours.
Specifications
Parameter
Value
Notes
Type
Auto lathe 46 type
Fits standard 46 series collet chucks
Bore diameter
3–20 mm
As per your drawing
Taper angle
30° or 45°
Standard or custom
Slot configuration
3-slot or 6-slot
Spring collet, full-length slots
Material
65Mn, 60Si2MnA, 9SiCr, 42CrMo
Spring steel or alloy steel
Hardness
42–48 HRC
After oil quenching and tempering
Tolerance
±0.005 mm on bore and taper
Measured at 20 °C
Surface finish
Ra 0.4 µm bore, Ra 0.8 µm others
No grinding marks
Heat treatment
Through-hardened
Not case-hardened
Roundness
≤0.003 mm
On finished bore
Runout (TIR)
≤0.005 mm
Concentric to taper datum
Process
CNC turning, milling, grinding
5-axis CNC + cylindrical grinding
Batch size
1–5,000 pieces
No MOQ
Inspection
100% dimensional check
CMM + optical comparator
Lead time
7–12 days
Prototype; 15–20 days for large batches
Country of origin
Made in China
Dongguan factory, 20 years experience
We use CNC turning for the outer profile and bore, then CNC milling for the slots. The taper is ground on a cylindrical grinder to hold the ±0.005 mm tolerance. Slot width is held to ±0.02 mm. Spring-back is controlled by heat treatment parameters, not by guesswork.
Three Reasons Buyers Send Us Their Drawings
1. Batch-traceable quality.
Every heat lot is tracked. We record material batch number, heat treatment furnace log, and final inspection data for each production run. If you need to trace a part failure, we can tell you exactly when it was hardened and who measured it. This is not typical for Chinese collet suppliers.
2. Inspection report per batch.
You get a dimensional report for every batch, not a sample. The report includes bore diameter, taper angle, slot width, hardness, and runout for each piece or per sampling plan (AQL 0.65). We also provide material certificates from the mill.
3. One factory for CNC + stamping + springs + heat sinks.
Your collet is not the only part you need. We run CNC machining, metal stamping, spring coiling, and heat sink fabrication under one roof. Send us your full assembly drawing, and we will quote the collet, the return spring, and the mounting bracket together. Fewer suppliers, fewer logistics headaches, one quality standard.
Where These Parts Are Used
This collet is for automatic lathes and CNC turning centers that use 46-type collet chucks. Typical applications:
Swiss-type lathes for small diameter bar stock, 3–20 mm, in medical device manufacturing
Multi-spindle automatic lathes for high-volume brass and aluminum parts, such as valve bodies and fittings
CNC turning centers for secondary operations on pre-machined blanks, where the bore must grip a finished diameter without marking it
Spring collets in feed fingers for bar feeders, where the small bore holds the bar during push-out cycles
The 46-type collet is common in Asian-built automatic lathes. If your machine uses a 46 series chuck, this collet drops in. We also make custom variants with reduced bore depth, special slot patterns, or coated surfaces (TiN or CrN) for abrasive materials.
Q: What is your MOQ?
A: No MOQ. We make one prototype for your fit test, then scale up. Tooling cost is amortized into the unit price for the first batch, not charged separately.
Q: How do you guarantee tolerance and quality?
A: We machine to your drawing, not to a generic standard. Each collet is measured on a CMM and an optical comparator. Bore runout is held to ≤0.005 mm TIR. We send a full inspection report with the shipment. If a part is out of spec, we replace it at no cost.
Q: What is your lead time?
A: 7–12 days for standard materials like 65Mn or 60Si2MnA. If you need 42CrMo or a special coating, add 3–5 days. For urgent orders, we can expedite to 5 days for a 15% surcharge.
Q: Do you provide material certificates?
A: Yes. We provide mill certificates for the raw material, heat treatment reports, and hardness test results. All documents are in English and stamped by our QC department.
Send Your Drawing
Send us your drawing for a firm quote. We reply within 12 hours with price, lead time, and a manufacturability review. If your design has a tight tolerance or an unusual slot pattern, we will tell you upfront what is achievable and what is not.
Email: sc@bquq.com
WhatsApp: +86 13713157787
Custom CNC collet chuck, made in China, no MOQ. Your drawing, our machines, verified quality.
