OpeningYour drawing becomes a finished 650 Type round bore spring collet chuck, verified before shipment. We run every custom CNC collet chuck through a full inspection on our own
Custom CNC Collet Chuck 650 Type Auto Lathe Round Bore
OpeningYour drawing becomes a finished 650 Type round bore spring collet chuck, verified before shipment. We run every custom CNC collet chuck through a full inspection on our own floor. No surprises
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing becomes a finished 650 Type round bore spring collet chuck, verified before shipment. We run every custom CNC collet chuck through a full inspection on our own floor. No surprises at your receiving dock.
Concentricity tolerance: 0.005 mm TIR
Hardness: HRC 58–62 after heat treatment
Lead time: 15–20 working days for custom sizes
No MOQ — order one piece or one thousand
This is a workholding component for auto lathes. It grips round stock, bar stock, or pre-machined parts. The 650 Type refers to the collet body size and taper geometry. We machine it to your exact drawing, not a catalog approximation.
Specifications
Parameter
Value
Material options
20CrMnTi, 40Cr, 65Mn, 9SiCr, or per drawing
Heat treatment
Carburized + quenched, or induction hardened
Hardness
HRC 58–62 (case), core HRC 35–45
Concentricity
≤ 0.005 mm TIR at nose
Bore diameter range
3 mm – 60 mm (round bore)
Taper angle
30° or per drawing
Surface finish
Ra 0.4 µm on taper, Ra 0.8 µm on bore
Machining process
CNC turning, internal grinding, wire EDM for slots
Slots
Milled or EDM, 3-slot or 6-slot design
Inspection
100% dimensional check, CMM report per batch
Batch size
1 – 10,000 pieces
Country of origin
Made in China, Dongguan factory
We use internal grinders for the taper and bore. This is not a turned-only part. The taper must match your spindle nose exactly. We hold that with a dedicated grinding fixture. Slots are cut after heat treatment to prevent distortion.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Each lot gets a unique heat number and work order. If you have a problem in year three, we trace it back to the material cert and the operator log. No guesswork.
2. Inspection report per batch.
You receive a dimensional report with every shipment. It lists bore diameter, taper angle, concentricity, and hardness. Our QC uses a CMM and a Rockwell tester. The report is signed by the inspector, not a computer.
3. One factory for multiple lines.
We run CNC machining, metal stamping, springs, and heat sinks under one roof. Your collet chuck ships alongside a stamped bracket, a compression spring, and an aluminum heat sink — all from the same plant. Fewer suppliers, fewer logistics headaches, one invoice.
Where these parts are used
The 650 Type collet chuck is common in Swiss-type and automatic lathe work. Typical applications:
Watch and jewelry manufacturing — gripping small brass or stainless pinions for slotting and drilling.
Medical device machining — holding titanium or cobalt-chrome blanks for bone screws and dental implants.
Fastener production — clamping hex bar or round bar for thread rolling and point forming.
Electronics connectors — micro collets for gold-plated pin stock, where surface finish matters.
If you run an auto lathe with a 650 taper spindle, this chuck is your interface. It must be concentric or your parts walk out of tolerance. We make it right the first time.
Q: Is there a minimum order quantity?
A: No MOQ. We machine one prototype or a full production run. The per-piece price drops at 50 and 200 pieces, but you never pay a setup penalty for a single unit.
Q: How do you guarantee tolerance and quality?
A: We grind the taper and bore after heat treatment. Every chuck is checked for TIR on a precision mandrel. The CMM report is included in the shipment. If a dimension is out, we replace it at no cost — but that rarely happens because we inspect before we ship.
Q: What is the lead time for a custom size?
A: Standard sizes ship in 10 working days. Custom bore diameters or special taper angles take 15–20 working days, including heat treatment and grinding. For urgent orders, we can split the batch and air-ship the first 10 pieces.
Q: Can 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 stamped by our QA department.
Send your drawing
We quote firm within 12 hours. Send your PDF or STEP file, plus your target quantity and tolerance. We reply with a price, lead time, and a technical review of any potential manufacturing issues.
Email: sc@bquq.com
WhatsApp: +86 13713157787
Precision manufacturing is our only business. Your drawing is the starting point. We handle the rest.
