OpeningYour drawing becomes a finished HSK50 ER20 collet chuck. We machine it from solid steel, grind the critical surfaces, and verify the taper and runout before shipment. No sur
OpeningYour drawing becomes a finished HSK50 ER20 collet chuck. We machine it from solid steel, grind the critical surfaces, and verify the taper and runout before shipment. No surprises.Tolerance: 0.
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing becomes a finished HSK50 ER20 collet chuck. We machine it from solid steel, grind the critical surfaces, and verify the taper and runout before shipment. No surprises.
Tolerance: 0.005 mm on taper and bore concentricity
Surface finish: Ra 0.4 on taper, Ra 0.8 elsewhere
Lead time: 10–15 working days for standard batches
No MOQ: order one piece or one thousand
Material: 20CrMnTi or 8620, case-hardened to 58–62 HRC
We use 5-axis CNC mills for the complex HSK50 taper and drive slots. Cylindrical grinders finish the taper and collet seat. Every chuck is checked with a precision taper gauge and a dial indicator for runout. We do not ship parts that fail our internal QC.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Every batch gets a unique job number. We record material heat numbers, machine settings, and operator IDs. If you need to trace a part back to its steel, we have the paperwork. This matters for aerospace and medical tooling.
2. Inspection report per batch.
You receive a dimensional report with every shipment. It lists taper angle, runout, hardness, and surface finish. No generic "certificate of conformance." You get actual numbers, measured on actual parts. If you need third-party inspection, we coordinate that too.
3. One factory for CNC + stamping + springs + heat sinks.
We are not a trading company. Our 5,000 m² facility runs CNC machining, metal stamping, spring coiling, and heat sink extrusion lines. You send us a drawing for a collet chuck, and we can also quote the retention knobs, springs, or coolant nozzles in the same email. Fewer suppliers, shorter lead times, one responsible party.
Where these parts are used
HSK50 ER20 collet chucks are standard in high-speed machining centers. They hold cutting tools with ER20 collets, typically for drills, end mills, and reamers up to 13 mm shank diameter.
Die and mold shops: High-speed finishing of hardened steel cavities. The short, rigid HSK50 taper reduces vibration at 15,000–20,000 rpm.
Automotive production lines: Drilling and tapping operations on aluminum and cast iron components. Quick tool changes and repeatable runout keep cycle times low.
Aerospace structural parts: Titanium and aluminum machining where tool holding stiffness directly affects surface finish and tool life.
Medical device manufacturing: Small-diameter drilling and milling on stainless steel implants. The ER20 collet system allows fast tool changes without removing the chuck from the spindle.
Prototype and job shops: One-off parts where you need a custom length, special bore, or modified flange. We machine to your drawing, not just a catalog standard.
Q: What is your MOQ?
A: No MOQ. We make one piece for sample validation or 5,000 pieces for production. The unit price drops with quantity, but we do not force you to buy more than you need.
Q: How do you guarantee tolerance and quality?
A: We grind the HSK50 taper and ER20 seat on the same setup to hold 0.005 mm TIR. Every part is checked with a taper gauge. We send a runout report with each batch. 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: Samples take 10 working days. Production runs take 15 working days after drawing approval. For urgent orders, we can expedite to 5 days for an additional fee.
Q: Can you provide material certificates?
A: Yes. We supply mill certificates for the raw steel, heat treatment reports, and our own dimensional inspection report. All documents are traceable to the batch number.
Send your drawing
Send us your PDF or STEP file. We will review the geometry, material, and tolerances. You get a firm quote within 12 hours, including unit price, lead time, and shipping cost. No obligation, no hidden fees.
Email: sc@bquq.com
WhatsApp: +86 13713157787
Precision manufacturing, made in China, no MOQ. Your custom CNC collet chuck, verified before shipment.
