This is a CNC machined auto lathe 46 type quenched collet with round bar. It grips round stock firmly for Swiss-type or sliding-head lathes. You get 0.005 mm TIR runout, 58-62 HRC hardness, and a 7-da
This is a CNC machined auto lathe 46 type quenched collet with round bar. It grips round stock firmly for Swiss-type or sliding-head lathes. You get 0.005 mm TIR runout, 58-62 HRC hardness, and a 7-day lead time from our Dongguan factory.
The 46 type collet uses a full-length slot pattern. When the draw tube pulls the collet backward, the tapered outer surface contracts evenly. This creates a 360-degree grip zone. Round bar stock stays centered. No hex or square deformation occurs.
We machine the bore to a 0.005 mm tolerance. The gripping force distributes across the full contact length. This prevents bar pushback during heavy cuts. You can hold tolerances of +/- 0.01 mm on your finished parts.
We start with 20CrMnTi or equivalent alloy steel. This grade hardens deeply without cracking. After CNC machining, we quench and temper in a vacuum furnace. The result is a uniform 58-62 HRC across the entire collet body.
Surface hardness resists wear from abrasive bar stock. The spring temper in the slot area prevents fracture during repeated open-close cycles. No case hardening here—this is through-hardened for long service life.
Standard bores range from 1 mm to 25 mm. We stock common metric sizes: 3, 4, 5, 6, 8, 10, 12, 16, 20, 25 mm. Each bore is ground after heat treatment. This removes distortion and holds roundness within 0.003 mm.
For non-standard sizes, we offer custom boring. You specify the round bar diameter. We machine the bore to your exact dimension. The gripping range for each collet is approximately 0.1 mm. Order the correct size for your stock.
We grind the taper and bore after quenching. Surface finish holds Ra 0.4 or better. This low friction ensures smooth axial movement in the spindle. The collet releases cleanly with no sticking.
Runout is checked at two points: the nose and the back bore. We use a precision air gauge. Maximum TIR is 0.005 mm. Typical parts measure 0.003 mm. This level of accuracy suits medical, automotive, and electronics components.
Each collet goes through a 5-step QC process. First, we verify hardness with a Rockwell tester. Second, we measure bore diameter with a bore gauge. Third, we check taper angle with a sine bar. Fourth, we test runout on a V-block. Fifth, we inspect surface finish with a profilometer.
We keep batch records for 10 years. If you have a problem, we trace the exact heat treat batch and CNC program. No random sampling—every piece is inspected 100%.
Collets are oiled and wrapped in anti-rust paper. They go into individual plastic tubes, then into export cartons. For 1-100 pieces, lead time is 7 days. For 100-1000 pieces, lead time is 12 days. We ship via DHL, FedEx, or sea freight.
We are a precision manufacturing factory in Dongguan, China, with 20 years of experience. We also make stamping parts, springs, and heat sinks. This collet is one product in our CNC machining line.
| Specification | Value |
|---|---|
| Product Type | CNC Machined Auto Lathe 46 Type Quenched Collet |
| Material | 20CrMnTi alloy steel |
| Hardness | 58-62 HRC |
| Bore Diameter Range | 1 mm - 25 mm |
| Bore Tolerance | +0.005 / -0 mm |
| Runout (TIR) | Max 0.005 mm |
| Surface Finish | Ra 0.4 µm |
| Taper Angle | Per DIN 6343 standard |
| Lead Time | 7 days for 1-100 pcs |
| MOQ | No MOQ, single piece accepted |
There is no MOQ. We accept a single piece order for testing or urgent replacement.
Yes, we can bore to any round bar size between 1 mm and 25 mm, with a 0.005 mm tolerance.
We use a precision air gauge and V-block setup, checking TIR at both nose and back bore for every piece.
50 pieces ship in 7 days from drawing approval or stock confirmation.
The 46 type taper matches common Japanese and European sliding head lathes. Brands like Citizen, Star, and Tsugami accept this geometry. The quenched body resists wear from stainless steel and titanium bar stock. You will replace collets less often.
For more on matching tooling to your machine, read our CNC cutting tool selection guide. It covers collet types, grip ranges, and spindle compatibility.
We price per piece based on bore size and quantity. A 6 mm bore collet costs less than a 20 mm bore collet. Tooling cost is zero for standard sizes. For custom bores, we add a small setup fee of $20.
Send your drawing or just specify the bar diameter. We will quote within 12 hours. If you need help with tolerances, our CNC machining tolerances guide explains what we can hold and why.
We are a made in China factory with direct pricing. No middlemen, no markups. You get the factory floor rate.
Email us your drawing at sc@bquq.com. Or send a WhatsApp message to +86 13713157787. We respond within 12 hours with a firm quote, MOQ, and lead time.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
