OpeningYour drawing defines the part. Our job is to make it exactly to that drawing, verify it before shipment, and get it to your line without surprises.We are BQUQ, a precision manufacturing factory
Your drawing defines the part. Our job is to make it exactly to that drawing, verify it before shipment, and get it to your line without surprises.
We are BQUQ, a precision manufacturing factory in Dongguan, China. We have run CNC machining lines for 20 years. This CAT40 ER25 collet chuck is machined from solid steel, not cast or welded. Every dimension is checked before the crate is sealed.
We machine these collet chucks on 5-axis CNC lathe-mill centers. The process is standard for tool holders: turning, milling, heat treatment, grinding, and final inspection. We do not outsource steps.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi, 40Cr, 8620, or per your spec |
| Hardness | 58-62 HRC (case hardened) |
| Taper accuracy | AT3 per ISO 1947 |
| Concentricity (TIR) | ≤ 0.005 mm at nose |
| Runout at 4xD | ≤ 0.01 mm |
| Surface finish | Ra 0.4 µm on taper, Ra 0.8 µm on body |
| Threads | Ground or rolled, class 2A/2B |
| Balance | G2.5 at 15,000 RPM (optional) |
| Heat treatment | Carburized or induction hardened, depth 0.8-1.2 mm |
| Batch size | 1 to 10,000 pieces |
| Inspection | CMM, taper gauge, hardness tester, runout gauge |
We can also add features like through-coolant holes, pull studs, or custom keyways. If you need a material cert, we provide it with the batch.
1. Batch-traceable quality. Every heat number and batch gets a unique ID. We keep records for 5 years. If a tool fails on your machine, we can trace it back to the exact bar stock and shift that machined it. This is not common for made-in-China suppliers. We do it because it saves you downtime.
2. Inspection report per batch. You do not have to trust us. Each batch ships with a dimensional report, material cert, and hardness test results. The report covers critical dimensions like taper angle, concentricity, and thread pitch. If you have a third-party inspector, they are welcome at our factory.
3. One factory for CNC + stamping + springs + heat sinks. We are not a trading company. Under one roof we run CNC machining, metal stamping, spring coiling, and heat sink extrusion lines. If your assembly needs a collet chuck, a stamped cover, a spring, and a heat sink, you send one drawing package. We coordinate the processes internally. That means fewer suppliers, less shipping, and one point of accountability.
A CAT40 ER25 collet chuck is a standard interface on vertical machining centers and CNC mills. It holds ER25 collets, which grip cutting tools from 1 mm to 16 mm shank diameter.
If you are running a production line and your current chucks show more than 0.01 mm runout, you are losing tool life and surface finish. Our custom CNC collet chuck is ground to hold tighter tolerances.
Looking for a different part? We also machine Precision CNC Collet Chuck Tool Holder | Custom BT30 ER Made in China in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We accept single-piece orders for prototype validation. The price per piece is higher for one-off, but the drawing review and inspection process is identical. For production batches, we offer tiered pricing.
Q: How do you guarantee tolerance and quality? A: We inspect 100% of critical dimensions on every part. Taper angle is checked with an air gauge. Concentricity is measured on a precision spindle. We send you the inspection report before shipment. If a part fails your incoming inspection, we replace it and pay the freight.
Q: What is the lead time? A: Standard custom batch is 15-20 working days after drawing approval. If you need a sample for fit testing, we can ship one in 7-10 days. Rush orders are possible, but we do not skip inspection steps to save time.
Q: Can you provide material certificates and heat treatment reports? A: Yes. We supply mill certificates for raw material, heat treatment curves, and hardness test reports. All documents are in English and stamped by our QC department.
Send us your 2D or 3D drawing. We will review it for manufacturability and quote firm within 12 hours. You get a unit price, lead time, and a clear list of any questions we have about your tolerances.
Email: sc@bquq.com WhatsApp: +86 13713157787
Precision manufacturing is not about promises. It is about verified dimensions. Send the drawing and let us prove it.
| 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 |
