Your drawing defines the part. We machine it. Before shipment, every collet is verified against your critical dimensions. No exceptions.This is a 46-type extended collet with a hex bore,
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Your drawing defines the part. We machine it. Before shipment, every collet is verified against your critical dimensions. No exceptions.This is a 46-type extended collet with a hex bore,
## Opening Your drawing defines the part. We machine it. Before shipment, every collet is verified against your critical dimensions. No exceptions.
This is a 46-type extended collet with a hex bore, designed for auto lathe spindles. It is made to your drawing, not from stock approximations. We hold concentricity and bore geometry to your print.
## Specifications We run this part on CNC Swiss-type and sliding-head auto lathes. The extended nose length and hex bore require stable machining and controlled heat treatment.
| Specification | Value |
|---|---|
| Material options | 20CrMnTi, 8620, 4140, 65Mn |
| Hardness (case) | 58–62 HRC |
| Hardness (core) | 30–35 HRC |
| Bore tolerance | ±0.005 mm on hex flats |
| Concentricity (bore to taper) | ≤0.008 mm TIR |
| Surface finish (bore) | Ra 0.4 µm |
| Surface finish (OD) | Ra 0.8 µm |
| Machining process | CNC turning, milling, internal grinding |
| Heat treatment | Carburizing + quench + temper |
| Inspection | 100% dimensional check, CMM report per batch |
| Batch size | 1–10,000 pieces |
| Lead time (prototype) | 7–12 days |
| Lead time (production) | 15–20 days |
| Country of origin | Made in China, Dongguan factory |
We grind the bore after heat treatment. This removes distortion and holds the hex geometry. The extended nose is machined in one setup where possible to keep concentricity.
## Three reasons buyers send us their drawings 1. Batch-traceable quality. Each batch gets a unique heat number and work order. Material certs are stored for 10 years. If a problem appears in your line, we trace it back to the exact melt and machining shift.
2. Inspection report per batch. You receive a dimensional report for every batch, not just a sample. The report lists bore size, hex flat-to-flat, concentricity, and hardness. We use a CMM and a Rockwell tester. Data is real, not estimated.
3. One factory for CNC, stamping, springs, and heat sinks. Your collet chuck is not the only part you need. We also run CNC machining, metal stamping, spring coiling, and heat sink fabrication under one roof. Send us the full assembly drawing. We coordinate the vendors, you get one invoice.
## Where these parts are used This collet is for auto lathes that machine small precision components. Typical applications:
The 46-type taper fits standard auto lathe spindles. The extended nose gives extra clearance for long workpieces. The hex bore prevents rotation of hex stock during machining.
## Questions buyers ask before ordering Q: What is your MOQ? A: No MOQ. We make one piece for prototype validation or 10,000 pieces for production. Tooling is standard for 46-type collets, so setup cost is low.
Q: How do you guarantee tolerance and quality? A: We machine to your drawing, then grind the bore after heat treatment. Every part is checked. You get a CMM report per batch. If a dimension is out, we rework or scrap at our cost.
Q: What is the lead time for a custom hex bore collet? A: Prototype in 7–12 days after drawing approval. Production in 15–20 days. For urgent orders, we can split the batch and ship the first 20% in 5 days.
Q: Can you provide material certificates? A: Yes. We supply EN 10204 3.1 material certs for 20CrMnTi, 8620, or your specified grade. Heat treatment reports are included with each batch.
## Send your drawing Send us your PDF or STEP file. We will check the bore geometry, taper angle, and extended length. You get a firm quote within 12 hours.
Email: sc@bquq.com WhatsApp: +86 13713157787
We are a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining experience. Custom CNC collet chuck, made in China, no MOQ. Your drawing is the starting point. We handle the rest.
Looking for a different part? We also machine Custom CNC Collet Chuck 630 Type Auto Lathe Round Bore | BQUQ in the same Dongguan factory.
| 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 |
