OpeningYour drawing defines the bore. We machine the rest.This is a 52 type square bore spring collet for auto lathes. We make it to your exact dimensions, not from stock approxima
Custom CNC Machined Auto Lathe 52 Type Square Bore Spring Collet
OpeningYour drawing defines the bore. We machine the rest.This is a 52 type square bore spring collet for auto lathes. We make it to your exact dimensions, not from stock approximations. Every unit is
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing defines the bore. We machine the rest.
This is a 52 type square bore spring collet for auto lathes. We make it to your exact dimensions, not from stock approximations. Every unit is verified before shipment.
Tolerance: ±0.005 mm on bore and slot width
Lead time: 7–12 working days for prototypes
No MOQ: order one piece or one thousand
Material: 65Mn spring steel or 9CrSi, hardened to HRC 45–50
We are a precision manufacturing factory in Dongguan, China. CNC machining is our core line. We have run this shop for 20 years.
All slots are wire-cut after heat treatment. This prevents distortion and keeps the spring action consistent. We grind the bore and OD in the same setup to hold concentricity under 0.005 mm.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Each batch gets a unique job number. Material heat number, machine operator, and inspection records are linked to that number. If a problem appears in your line, we trace it back to the exact heat and shift. No guesswork.
2. Inspection report per batch.
You get a dimensional report with every shipment. It lists bore size, slot width, hardness, and concentricity for each sampled piece. We use a CMM and a hardness tester. The report is signed by our QC lead, not a junior inspector.
3. One factory for CNC, stamping, springs, and heat sinks.
Your collet is not an orphan part. If your assembly also needs a stamped washer, a compression spring, or a heat sink, we make them under one roof. One purchase order, one shipping date, one quality standard. This cuts your supplier list and your risk.
Where these parts are used
Square bore spring collets are not exotic. They are workhorses in high-volume turning.
Auto lathes (Swiss-type and cam-type): Holding square or hex bar stock for screw machining. Common in fastener production.
Medical device manufacturing: Small titanium and stainless parts, where bore accuracy directly affects part roundness.
Electronics connectors: Machining square brass or copper pins for terminals. The collet must grip without marking the surface.
Automotive fuel injectors: High-volume production of nozzle blanks. Collet changeover time matters, so a consistent 52 type interface is critical.
Aerospace fasteners: Inconel and titanium bolts, where tool wear is high and the collet must hold repeatably over long runs.
In every case, the collet is the last mechanical interface before the tool touches the part. If it is off by a micron, the part is off by a micron. That is why we verify before shipment.
Q: What is your MOQ?
A: No MOQ. We make one piece for prototyping and scale up to 10,000 pieces for production. The unit price drops with quantity, but we do not force you to buy more than you need.
Q: How do you guarantee tolerance and quality?
A: We machine to your drawing, then inspect with a CMM. Bore tolerance is ±0.005 mm. We send a batch inspection report with every order. If a part fails your incoming check, we replace it at no cost, including shipping.
Q: What is your lead time for a custom CNC collet chuck?
A: For 1–50 pieces, 7 working days. For larger batches, 12 working days. If you need faster, tell us at quoting. We can split the batch and air-ship the first 20 pieces while the rest finish production.
Q: Do you provide material certificates?
A: Yes. We supply mill certificates for the raw material, heat treatment reports, and hardness test results. All are traceable to the batch number. This is standard, not an extra-cost option.
Send your drawing
Send us your drawing in PDF, STEP, or IGES. We will reply with a firm quote in 12 hours.
The quote includes unit price, tooling cost (if any), lead time, and shipping options. No hidden charges. No minimum order.
Email: sc@bquq.com
WhatsApp: +86 13713157787
We are a precision manufacturing shop in Dongguan, China. We have made custom CNC collet chucks for 20 years. Your drawing is safe with us—we sign NDAs on request.
