OpeningYour drawing becomes a verified part. We machine the 40 type collet to your exact dimensions, then check every critical feature before shipment. No surprises on your spindle
Custom CNC Collet Chuck 40 Type Auto Lathe Parts Made in China
OpeningYour drawing becomes a verified part. We machine the 40 type collet to your exact dimensions, then check every critical feature before shipment. No surprises on your spindle.Tolerance: ±0.005 m
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
Your drawing becomes a verified part. We machine the 40 type collet to your exact dimensions, then check every critical feature before shipment. No surprises on your spindle.
Tolerance: ±0.005 mm on bore and taper
Lead time: 7–12 working days after drawing approval
No MOQ: one piece or one thousand, same process
Material: 20CrMnTi or 40Cr, hardened to 58–62 HRC
Made in China, shipped worldwide with full inspection report
This is a precision manufacturing part, not a stock item. We cut, heat-treat, grind, and verify each collet against your print. You get a drop-in replacement for your auto lathe or Swiss-type machine.
Specifications
Parameter
Value
Type
40 type collet (DIN 6343 or custom profile)
Bar stock range
Ø3 mm to Ø40 mm round bar
Material options
20CrMnTi, 40Cr, 65Mn, or per your spec
Hardness
58–62 HRC (carburized or induction hardened)
Bore tolerance
±0.005 mm
Taper angle
30° or 45°, per drawing
Surface finish
Ra 0.4 µm on bore, Ra 0.8 µm on taper
Concentricity
≤0.01 mm TIR
Keyway/slot width
±0.02 mm
Process
CNC turning, milling, grinding, heat treatment
Inspection
100% dimensional check, CMM report per batch
Batch size
1 to 10,000 pieces
Lead time
7 days for prototypes, 12 days for production runs
We use CNC lathes and jig grinders for the bore and taper. Heat treatment is done in-house with a vacuum furnace, so hardness is consistent across the batch. Each collet is serialized for traceability.
Three reasons buyers send us their drawings
1. Batch-traceable quality.
Every collet gets a unique number. We record material heat number, heat treatment cycle, and final dimensions. If a problem appears in your production, we can trace it back to the exact batch and process step. No guesswork.
2. Inspection report per batch.
You receive a dimensional report with every shipment. It lists bore size, taper angle, concentricity, and hardness for each collet or a sample per batch. This report is signed by our QC engineer and matches your drawing tolerances. You can file it with your own QA records.
3. One factory for multiple lines.
We run CNC machining, metal stamping, springs, and heat sinks under one roof. If your collet assembly needs a stamped retainer, a spring pusher, or a heat sink for the spindle motor, we make it in the same plant. Fewer suppliers, shorter lead times, one responsible party.
Where these parts are used
The 40 type collet is a workhorse in automatic lathes and CNC turning centers. It grips round bar stock during machining, then releases for the next feed cycle. Typical applications:
Swiss-type lathes: For long, slender parts like medical guidewires, watch pins, and connector pins. The collet holds the bar with minimal runout.
Multi-spindle automatics: For high-volume parts like fasteners, bushings, and valve components. The 40 type collet handles continuous bar feeding without jamming.
CNC turning centers: For secondary operations on pre-machined round stock. The collet provides repeatable clamping force for finishing passes.
Cold heading machines: As a feed collet for wire or rod stock before the heading die. Hardened collets resist wear from abrasive wire surfaces.
Automotive fuel systems: For machining injector bodies and pump plungers where concentricity is critical.
If your machine uses a 40 type collet, we can match the taper, thread, and bore to your existing holder.
Q: What is the minimum order quantity?
A: No MOQ. We make one prototype for your fit test, then scale to production. The per-piece price drops at 50, 100, and 500 pieces, but the setup quality is identical.
Q: How do you ensure tolerance and quality?
A: We use CMM and air gauges for bore and taper measurement. Each collet is checked for concentricity and hardness. The inspection report is included with the shipment. If a part is out of spec, we replace it at no cost.
Q: What is your lead time for custom collets?
A: Prototype (1–5 pieces) takes 7 working days. Production (50+ pieces) takes 10–12 working days after you approve the sample. Urgent orders can be expedited to 5 days with a small surcharge.
Q: Do you provide material certificates?
A: Yes. We supply mill certificates for the raw material, heat treatment reports, and a full dimensional inspection report. All documents are in English and can be notarized if needed.
Send your drawing
Email your PDF or STEP file to sc@bquq.com with your target quantity and material preference. We reply with a firm quote in 12 hours, including unit price, tooling cost (if any), and delivery date.
Prefer chat? WhatsApp +86 13713157787 — we answer within one business hour, China time (UTC+8).
Your custom CNC collet chuck, made in China, verified before shipment. No MOQ, no minimum batch, no excuses. Send the drawing today.
