OpeningYou send the drawing. We machine the collet. Every unit is verified before shipment. No exceptions.This is a 36 Type auto lathe collet, bored to match your hex bar stock. We
Custom CNC Collet Chuck 36 Type Hex Bar Stock Precision Made in China
OpeningYou send the drawing. We machine the collet. Every unit is verified before shipment. No exceptions.This is a 36 Type auto lathe collet, bored to match your hex bar stock. We hold roundness and
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
You send the drawing. We machine the collet. Every unit is verified before shipment. No exceptions.
This is a 36 Type auto lathe collet, bored to match your hex bar stock. We hold roundness and concentricity to 0.005 mm. Hardness is checked on every batch.
Tolerance: 0.005 mm on bore and taper
Lead time: 7–10 working days for prototypes
Batch size: from 1 piece to 10,000 pieces
No MOQ. Ever.
Material certs included with every shipment
We are a precision manufacturing factory in Dongguan, China, with 20 years on CNC machining lines. Your collet is made to your print, not to a catalog guess.
Specifications
Parameter
Value
Type
36 Type auto lathe collet
Bar stock shape
Hex (6-flat), any A/F dimension from 3 mm to 25 mm
Material options
AISI 4140, 8620, 1045, or per your spec
Hardness
58–62 HRC (case-hardened) or 40–45 HRC (through-hardened)
Bore tolerance
+0.005 / 0 mm
Taper angle
30° or per your drawing
Concentricity
≤ 0.005 mm TIR
Surface finish
Ra 0.4 µm on bore, Ra 0.8 µm on taper
Heat treatment
Carburized or induction hardened, then ground
Machining process
CNC turning, internal grinding, wire-cut slotting
Inspection
100% dimensional check on bore and taper; hardness test per batch
Batch size
1 to 10,000+
Lead time
7 days for samples, 15 days for production runs
Country of origin
Made in China, Dongguan factory
We grind the bore after heat treatment. That is how we hold 0.005 mm. We do not skip this step.
Three reasons buyers send us their drawings
1. Batch-traceable quality
Every collet gets a unique batch number. We record raw material heat number, heat treatment furnace log, and final inspection data. If a problem shows up in your spindle, you can trace it back to the exact batch and process step. No guesswork.
2. Inspection report per batch
You get a full dimensional report with every shipment. Bore size, taper angle, concentricity, hardness — all measured and recorded. We use a CMM and a hardness tester calibrated every 6 months. The report is signed by the QC lead, not an intern.
3. One factory for CNC + stamping + springs + heat sinks
You are not just buying a collet. You are buying a supply chain. If your assembly needs a stamped retainer, a spring, or a heat sink for the spindle motor, we make those too. One purchase order, one quality system, one shipping date. Fewer vendors, fewer headaches.
Where these parts are used
A 36 Type collet with hex bore is not a generic part. It is used where round stock cannot do the job.
Swiss-type lathes and automatic screw machines — feeding hex brass or aluminum bar for electrical connectors and terminals.
Fastener manufacturing — holding hex stock for cold heading or machining of bolts, nuts, and fittings.
Hydraulic fittings — machining hex bar into adapter bodies and valve seats.
Medical device components — small hex titanium or stainless parts for surgical instruments, where concentricity is critical.
Aerospace secondary operations — re-machining hex stock for brackets or bushings after initial forming.
In each case, the collet must grip the hex flats without deforming the bar, and release it cleanly at high cycle rates. Our bore geometry and surface finish make that happen.
Q: Is there a minimum order quantity?
A: No. We run a single piece for prototype validation. Production pricing starts at 50 pieces, but you can order 1 piece at prototype pricing. No MOQ is a policy, not a trick.
Q: How do you guarantee 0.005 mm tolerance?
A: We grind the bore after heat treatment. We measure every part on a CMM. If a part is out of spec, it is scrapped, not shipped. You receive an inspection report with the batch.
Q: What is your lead time for a custom collet?
A: 7 working days for a sample, 15 working days for a production batch of up to 5,000 pieces. If you need faster, tell us at the quote stage — we can split the batch and ship partials.
Q: Can you provide material certificates?
A: Yes. Every batch includes a mill certificate for the raw material and a heat treatment report. If you need third-party testing, we can arrange it at cost.
Send your drawing
Stop guessing. Send us your drawing and get a firm quote in 12 hours.
Email: sc@bquq.com
WhatsApp: +86 13713157787
We will confirm material, tolerance, and price before you commit. No MOQ, no hidden tooling charges. Just a precision-made custom CNC collet chuck, verified and shipped from our Dongguan factory.
