OpeningYour drawing defines the part. We machine it to that drawing, then verify it before shipment. This is not a catalog item. It is a custom CNC collet chuck built for your spin
Custom CNC Machined Auto Lathe 52 Type Hex Bore Spring Collet
OpeningYour drawing defines the part. We machine it to that drawing, then verify it before shipment. This is not a catalog item. It is a custom CNC collet chuck built for your spindle, your workpiece,
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing defines the part. We machine it to that drawing, then verify it before shipment. This is not a catalog item. It is a custom CNC collet chuck built for your spindle, your workpiece, and your tolerance stack-up.
The 52 Type auto lathe collet is a high-precision workholding component. We make it from your print, with your bore geometry, your hex size, and your material specification. Every unit is inspected against your critical dimensions. We ship only what passes.
Tolerance: ±0.005 mm on bore and hex geometry
Lead time: 7–12 working days after drawing approval
No MOQ: order 1 piece or 1,000 pieces
Material: 20CrMnTi or 65Mn, case-hardened to HRC 58–62
Made in China, shipped worldwide
Specifications
Parameter
Value
Notes
Material
20CrMnTi, 65Mn, or 9SiCr
Per your drawing or application
Hardness
HRC 58–62 (case-hardened)
Core hardness HRC 30–40
Tolerance
±0.005 mm on bore and hex
Concentricity ≤ 0.005 mm
Surface finish
Ra 0.4 µm on bore, Ra 0.8 µm elsewhere
Optional mirror polish
Slots
Milled or wire-cut, full-length or partial
Slot width ±0.02 mm
Heat treatment
Carburizing or through-hardening
Depth 0.3–0.8 mm per spec
Process
CNC turning, milling, grinding, wire EDM
Auto lathe 52 Type profile
Inspection
100% dimensional check per batch
CMM report included
Batch size
1–5,000 pieces
No MOQ, no setup penalty
Lead time
7–12 working days
Faster for small batches
We use CNC lathes for the outer profile and bore, then wire EDM for the hex and slots. Grinding is done on the bore and taper for concentricity. Each collet is individually numbered for traceability.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Every batch gets a unique lot number. We record material heat numbers, machine parameters, and inspection results. If a problem appears in your production, we can trace it back to the exact batch and process step. You get a full inspection report per batch, not a generic certificate.
2. Inspection report per batch.
We measure every critical dimension on every part. The report lists bore diameter, hex size, slot width, hardness, and concentricity. You receive it with the shipment. No surprises on your side.
3. One factory for CNC + stamping + springs + heat sinks.
We run four production lines under one roof. If your assembly needs a collet, a stamped retainer, a spring, and a heat sink, we make them all. You deal with one engineer, one quality system, one shipping point. Less coordination, fewer delays.
Where these parts are used
The 52 Type hex bore spring collet is a workhorse in automatic lathes and Swiss-type machines. It holds hexagonal bar stock, square stock, or round stock with a hex-shaped bore. Common applications:
Auto lathe spindles – feeding hex brass, aluminum, or steel bars for high-volume turning
Swiss-type CNC machines – guiding and gripping bar stock during precision turning
Secondary machining fixtures – holding hex parts for milling, drilling, or tapping
Fastener production – gripping hex blanks for bolt and screw manufacturing
Hydraulic fittings – machining hex bodies from bar stock with minimal runout
The spring action of the collet allows quick release and reload, reducing cycle time. The hex bore prevents rotation of the workpiece, so you can machine flats, holes, or threads without a separate indexing fixture.
Q: What is the minimum order quantity?
A: No MOQ. We accept one piece for prototyping or a full production run. The unit price drops with quantity, but we do not penalize small orders.
Q: How do you guarantee tolerance and quality?
A: We inspect every part against your drawing. Bore and hex are measured with CMM and air gauges. Hardness is tested on each batch. We send the inspection report with the shipment. If a part fails, we replace it at no cost.
Q: What is the lead time?
A: 7–12 working days after drawing approval. Prototype orders (1–5 pieces) often ship in 5–7 days. For repeat orders, we keep your tooling and program on file, so lead time drops to 5–8 days.
Q: Can you provide material certificates?
A: Yes. We provide mill certificates for the raw material, heat treatment reports, and hardness test results. All certificates are traceable to the batch number.
Send your drawing
Send us your drawing in PDF, STEP, or IGES format. We will review the geometry, confirm the material and heat treatment, and give you a firm quote within 12 hours. No obligation, no hidden costs.
Email: sc@bquq.com
WhatsApp: +86 13713157787
Precision manufacturing is our core. Custom CNC collet chuck is our specialty. Made in China, with the quality you expect. No MOQ, no minimum order penalty. Send your drawing today.
