OpeningYour drawing defines the part. Our job is to hold that tolerance and prove it before the crate leaves Dongguan.We machine ER collet chucks and square bore collets to your exact geometry. Every
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OpeningYour drawing defines the part. Our job is to hold that tolerance and prove it before the crate leaves Dongguan.We machine ER collet chucks and square bore collets to your exact geometry. Every
Your drawing defines the part. Our job is to hold that tolerance and prove it before the crate leaves Dongguan.
We machine ER collet chucks and square bore collets to your exact geometry. Every unit is verified against your print. We do not ship guesswork.
At a glance: Concentricity within 0.005 mm TIR. Surface finish down to Ra 0.4. Lead time 15–20 working days after drawing approval. No MOQ. One prototype or 5,000 pieces, same process discipline.
| Parameter | Value |
|---|---|
| Material options | 20CrMnTi, 40Cr, 12L14, 303/304/316 stainless, 6061-T6 aluminum, H13 tool steel |
| Hardness (steel) | Carburized 58–62 HRC, or induction hardened 50–55 HRC |
| Concentricity (collet to chuck body) | ≤ 0.005 mm TIR |
| Square bore tolerance | ± 0.01 mm on width and corner radius |
| Surface finish | Ra 0.4 µm on bore, Ra 0.8 µm on external taper |
| Key machines | 5-axis CNC mills, Swiss-type lathes, cylindrical grinders, wire EDM |
| Inspection tools | CMM (Zeiss), optical comparator, dial bore gauges, hardness tester |
| Batch traceability | Full material heat number and process log per batch |
| Lead time | 15–20 working days for standard sizes; 25 days for complex geometries |
| MOQ | No MOQ. Single piece accepted |
| Country of origin | Made in China, Dongguan factory |
1. Batch-traceable quality, not just a QC stamp. Every batch gets a unique number. That number links to material certs, machine operator logs, and CMM reports. If a problem appears in your assembly line six months later, we can pull the exact batch record and tell you which tool wore down and when. You cannot get this from a trading company.
2. Inspection report per batch, included free. We do not ask you to trust us. Each shipment includes a dimensional report with measured values for every critical feature. You check our numbers against your gauge. If anything is out of spec, we remake it at our cost. No arguments, no delay.
3. One factory for CNC, stamping, springs, and heat sinks. Your collet chuck might need a spring collet, a stamped retainer plate, or a heat sink for a high-speed spindle. We make all of those in the same building. You send one drawing package, deal with one engineering team, and receive one consolidated shipment. Fewer vendors, fewer handoff errors, lower logistics cost.
Looking for a different part? We also machine Custom CNC Collet Chuck ER25 Precision Machined to Drawing | BQUQ in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We machine one prototype for your validation, then scale to your volume. Prototype price is higher per piece, but the tooling and process remain identical for production runs.
Q: How do you guarantee tolerance on a square bore? A: We cut the square bore with wire EDM, then finish with a precision broach or internal grinder. CMM inspection measures width, corner radius, and concentricity on every part in the batch. We send you the report before shipment.
Q: What is your standard lead time? A: 15–20 working days for material in stock. If you need 48-hour expedite for a broken tool replacement, we can do that for standard ER collet sizes. Tell us your emergency upfront.
Q: Can you provide material certificates and heat treatment reports? A: Yes. Every batch ships with mill certificates for raw material, heat treatment curves, and hardness test results. All documents are in English and stamped by our QA manager.
Stop guessing which supplier can hold your tolerance. Send us your PDF or STEP file. We reply with a firm quote in 12 hours, including price, lead time, and a manufacturing feasibility note.
Email: sc@bquq.com WhatsApp: +86 13713157787
Precision manufacturing is not a promise. It is a measured result. We show you the numbers.
| 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 |
