OpeningThis is a 52-type round bore spring collet chuck, machined to your exact drawing. We hold bore concentricity to 0.005 mm TIR. Every unit is verified on a CMM before shipment
Custom CNC Auto Lathe 52 Type Round Bore Spring Collet Chuck | BQUQ
OpeningThis is a 52-type round bore spring collet chuck, machined to your exact drawing. We hold bore concentricity to 0.005 mm TIR. Every unit is verified on a CMM before shipment. No exceptions.You
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
This is a 52-type round bore spring collet chuck, machined to your exact drawing. We hold bore concentricity to 0.005 mm TIR. Every unit is verified on a CMM before shipment. No exceptions.
You send the drawing. We cut the steel. You get a chuck that seats true and holds repeatability runout under 0.01 mm.
Tolerance: ±0.005 mm on bore, ±0.01 mm on slots
Lead time: 7–12 working days for standard sizes
No MOQ – order one piece or one thousand
Material: 65Mn, GCr15, or 9SiCr per your spec
Surface: black oxide, hard chrome, or plain ground
This is a custom CNC collet chuck, made in China, built for production machines that cannot afford a loose grip or a wobble.
Quenched and tempered, or induction hardened on request
Process
CNC turning, CNC milling, wire EDM for slots, centerless grinding
Inspection
100% dimensional check, CMM report per batch
Batch size
1 piece to 10,000 pieces
Lead time
7 days for prototypes, 12 days for production runs
We use auto lathes for the body, wire EDM for the expansion slots, and centerless grinding for the OD. This combination gives you a collet that opens evenly and closes without binding.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Each heat number is recorded. Each batch gets a unique serial range. If you have a problem on your line, we trace it back to the exact steel lot and the exact machine operator. You do not get that from a trading company.
2. Inspection report per batch.
We ship a full dimensional report with every order. Bore size, slot width, concentricity, hardness – all measured, all documented. Your incoming QC can verify in ten minutes. No surprises.
3. One factory for CNC + stamping + springs + heat sinks.
Your collet chuck is not an isolated part. You may also need a spring pusher, a stamped washer, or a heat sink for the spindle motor. We make all of them under one roof. You send one drawing set, get one quote, receive one shipment. Fewer vendors, fewer delays.
Where these parts are used
This collet chuck is for automatic lathes and Swiss-type CNC machines. It holds round bar stock from 3 mm to 52 mm. Typical applications:
Automotive fuel injector bodies – high volume, tight concentricity, long cycle times. The chuck must hold the same position for 100,000 cycles.
Medical implant screws – titanium and stainless steel, small diameters, zero tolerance for scoring. A polished bore and even slot width prevent marking.
Fastener production – hex bolts and socket screws. The collet grips the bar, the auto lathe cuts the thread, the part drops. Repeatability is everything.
Hydraulic fittings – brass and steel, short runs, frequent changeovers. A 52 type collet swaps in minutes, so you keep the spindle running.
Connector pins for electronics – gold-plated brass, 3–8 mm diameter. The round bore protects the plating, and the spring action releases the part cleanly.
If you turn round stock on an auto lathe, this chuck is the interface between your spindle and your part. Get it wrong, and every part is scrap. Get it right, and you forget it exists.
Q: Is there really no MOQ?
A: Correct. We make one piece for prototyping. The price per piece is higher at low quantity, but the tooling is standard. You pay for the part, not for a minimum run.
Q: How do you guarantee 0.005 mm concentricity?
A: We grind the bore and the OD in the same setup after heat treatment. Then we measure on a CMM. The report is included in the shipment. If the part does not meet spec, we replace it at our cost.
Q: What is the lead time for a custom size?
A: For a standard 52 type body with a custom bore, 7 working days. For a completely new body design, 12 working days. Rush orders are possible with prior notice.
Q: Do you provide material certificates?
A: Yes. We supply mill certificates for the steel, heat treatment reports, and hardness test results. All documents are in English and can be notarized if your customer requires it.
Send your drawing
Do not guess. Send us your drawing and get a firm quote in 12 hours.
We reply with a price, a lead time, and a technical review of your tolerances. If we see a problem in your design, we tell you before you order.
Email: sc@bquq.com
WhatsApp: +86 13713157787
Precision manufacturing is not a slogan. It is a CMM report, a heat number, and a collet that holds true. Send your drawing. We will prove it.
