OpeningYour drawing becomes a finished collet chuck. We machine it to your exact bore diameter, taper angle, and slot geometry. Every unit is verified with a full dimensional repor
Custom CNC Collet Chuck 25 Type Round Bore Auto Lathe Parts
OpeningYour drawing becomes a finished collet chuck. We machine it to your exact bore diameter, taper angle, and slot geometry. Every unit is verified with a full dimensional report before shipment. N
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing becomes a finished collet chuck. We machine it to your exact bore diameter, taper angle, and slot geometry. Every unit is verified with a full dimensional report before shipment. No surprises.
Tolerance: ±0.005 mm on bore and taper
Lead time: 7–12 working days for standard sizes
No MOQ: order 1 piece or 1,000 pieces
Material: 20CrMnTi, 65Mn, or 9CrSi steel
Hardness: 58–62 HRC after heat treatment
We are a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining experience. Our auto lathe line runs 24/7. We make collet chucks for clients who need repeatable gripping force and long service life.
Specifications
Parameter
Value
Type
25 Type round bore spring collet chuck
Bore diameter range
3.0 mm – 25.4 mm
Taper angle
16° (standard) or per drawing
Material options
20CrMnTi, 65Mn, 9CrSi, 42CrMo
Hardness
58–62 HRC (case-hardened)
Surface finish
Ra 0.4 μm on bore, Ra 0.8 μm on taper
Concentricity
≤ 0.008 mm TIR
Gripping force repeatability
± 2% across batch
Machining process
CNC turning, CNC grinding, wire EDM slotting
Heat treatment
Carburizing + quenching + tempering
Inspection
100% dimensional check, batch sample for metallurgy
Batch size
1 – 5,000 pieces
Lead time
7 days (prototype), 12 days (production)
We grind the taper and bore on the same setup to hold concentricity. Slots are cut with wire EDM to avoid burrs. Each chuck is serial-numbered for traceability.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Every heat treatment batch gets a unique code. We record material lot, furnace curve, and hardness readings. If a problem appears in your line, we can trace it back to the exact batch and date. This is standard for us, not a paid extra.
2. Inspection report per batch.
You get a PDF with CMM data for bore diameter, taper angle, concentricity, and surface roughness. We also include a hardness certificate. No generic "certificate of conformance." You see the actual numbers.
3. One factory for CNC + stamping + springs + heat sinks.
Your collet chuck is not an isolated part. If your assembly also needs a spring, a stamped retainer, or a heat sink, we make them in the same building. One purchase order, one quality system, one shipping date. Fewer suppliers, fewer delays.
Where these parts are used
Our 25 Type round bore collet chucks are used in automatic lathes for high-volume turning of small parts. Typical applications:
Watch and instrument components – pinions, arbors, balance staffs. The round bore grips delicate parts without marking them.
Medical device manufacturing – bone screws, dental implant posts, small drill bits. The ±0.005 mm bore tolerance keeps runout low.
Q: What is your MOQ?
A: No MOQ. We accept one piece for a prototype. Production batches of 100–5,000 pieces are common. Tooling is standard for 25 Type collets, so there is no setup penalty for small orders.
Q: How do you guarantee tolerance and quality?
A: We machine to ±0.005 mm on bore and taper. Every piece is measured on a CMM. We send you the inspection report with the shipment. If any dimension is out of spec, we replace the part at our cost, including freight.
Q: What is the lead time for a custom bore size?
A: 7 working days for a prototype, 12 working days for production quantities. If you need faster, we can rush a single piece in 3 days for a small expedite fee. We stock raw material for 20CrMnTi and 65Mn in common diameters.
Q: Do you provide material certificates?
A: Yes. We supply mill certificates for the raw material, heat treatment reports with hardness curves, and a RoHS/REACH declaration if required. All documents are in English.
Send your drawing
Send us your 2D drawing or 3D model. We will check the bore size, taper angle, slot width, and material callout. You get a firm quote within 12 hours, including unit price, tooling cost (if any), and delivery date.
Email: sc@bquq.com
WhatsApp: +86 13713157787
We reply in English, directly from the engineer who will quote your job. No sales agents, no middlemen. Custom CNC collet chuck, made in China, with no MOQ and full traceability. Your drawing is safe with us – we sign NDA on request.
