OpeningThis is a closeup of a CNC machined auto lathe 36 type collet with a rear thread. It is made to your drawing, not from stock. We verify every dimension before shipment.Toler
Custom CNC Collet Chuck Auto Lathe 36 Type Rear Thread Closeup | BQUQ
OpeningThis is a closeup of a CNC machined auto lathe 36 type collet with a rear thread. It is made to your drawing, not from stock. We verify every dimension before shipment.Tolerance: ±0.005 mm on c
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
This is a closeup of a CNC machined auto lathe 36 type collet with a rear thread. It is made to your drawing, not from stock. We verify every dimension before shipment.
Tolerance: ±0.005 mm on critical diameters
Lead time: 7–12 days for prototypes, 15–20 days for production runs
No MOQ – order one piece or ten thousand
Material: 20CrMnTi or 42CrMo, case-hardened to HRC 58–62
You send the drawing. We machine the collet. You get a part that fits your spindle and holds your workpiece concentric.
Specifications
Parameter
Value
Material options
20CrMnTi, 42CrMo, 65Mn, SUS440C
Hardness
HRC 58–62 (case-hardened) or HRC 40–45 (through-hardened)
Tolerance
±0.005 mm on bore and thread pitch diameter
Surface finish
Ra 0.4 µm on taper, Ra 0.8 µm on thread flanks
Thread type
Rear thread, metric or inch, class 6H/6g
Slotting
EDM wire-cut, 0.3 mm width, 3 or 6 slots
Machines
Citizen L32, Tsugami B020, Star SR-32, plus 5-axis CNC
Inspection
CMM full report, thread plug gauge, taper gauge
Batch size
1 to 50,000 pieces
Lead time
7 days for 1–50 pcs, 15 days for 500+ pcs
Country
Made in China, Dongguan factory
We cut the rear thread on a CNC lathe, then grind the taper and bore on a cylindrical grinder. Slots are EDM wire-cut to avoid burrs. Each collet is serialized and matched to its inspection report.
Three reasons buyers send us their drawings
1. Batch-traceable quality
Every heat lot is separated. We record material batch numbers, heat treatment curves, and final inspection data. If a problem appears in your assembly line, we can trace it to the exact melt and machine cycle. No guesswork.
2. Inspection report per batch
You get a PDF with CMM coordinates, thread pitch diameter readings, hardness values, and taper angle measurements. We do not ship a box of parts without data. Our QC team signs off on every batch, and we keep records for 5 years.
3. One factory for CNC + stamping + spring + heatsink
Your collet chuck may need a spring for the closing mechanism, a stamped retainer ring, or a heatsink for a high-speed spindle. We make all of these in-house. You deal with one engineer, one invoice, one shipping point. Fewer suppliers, fewer delays.
Where these parts are used
This 36 type collet with rear thread is common in Swiss-type and sliding-headstock auto lathes. Typical applications:
Medical device machining – holding small titanium screws and bone pins, where runout must stay under 0.01 mm
Watch and jewelry – turning pinions, balance staffs, and bezels with mirror finishes
Electronics connectors – machining brass and beryllium copper pins for high-frequency connectors
Automotive fuel injectors – holding needle valves and nozzle bodies during precision turning
Aerospace fasteners – producing small threaded bolts and inserts from Inconel or 17-4PH
The rear thread design lets you pull the collet into the draw tube. That gives higher clamping force and better concentricity than a push-type collet. It is the right choice when your spindle runs above 8,000 RPM.
Q: What is your MOQ?
A: No MOQ. We make one piece for a prototype or 10,000 for production. The unit price drops at 100, 500, and 1,000 pieces. Tooling and setup costs are quoted separately for first articles.
Q: How do you guarantee tolerance and quality?
A: We grind the taper and bore on the same setup to hold concentricity under 0.005 mm. Each collet is checked with a thread plug gauge and a taper gauge. A CMM report is included with every shipment. If a part fails your incoming inspection, we replace it at no cost.
Q: What is your lead time for custom CNC collet chucks?
A: Prototype (1–10 pcs): 7 days. Production (100–1,000 pcs): 15 days. Larger orders: 20–25 days. We can rush a single piece in 3 days if you need it for a line-down situation.
Q: Do you provide material certificates?
A: Yes. We supply mill certificates for the raw material, heat treatment reports, and a RoHS/REACH declaration if required. For aerospace or medical parts, we can provide full traceability documentation.
Send your drawing
Send us your 2D drawing or 3D model. We will review the tolerances, suggest a material if you are unsure, and give you a firm quote within 12 hours.
Email: sc@bquq.com
WhatsApp: +86 13713157787
No MOQ. No minimum order fee. Just a precise quote for your custom CNC collet chuck, made in China, verified before shipment.
