OpeningYour sprocket drawing is the only spec we need. We machine it to your exact tooth profile, pitch, and bore. Every part is verified before shipment. We do not batch-run and hope. We measure.Tole
Your sprocket drawing is the only spec we need. We machine it to your exact tooth profile, pitch, and bore. Every part is verified before shipment. We do not batch-run and hope. We measure.
We are a precision manufacturing factory in Dongguan, China. 20 years of machining experience. Our sprockets run on chains that move heavy loads, index precisely, and synchronize motion. If you have a drawing, we have a quote for you today.
| Parameter | Value |
|---|---|
| Materials | 1045, 4140, 42CrMo, 304/316 stainless, aluminum 6061-T6, brass, nylon |
| Tooth profile | ASME/ANSI, DIN, ISO, or custom per your drawing |
| Machining process | 5-axis CNC milling, CNC turning, wire EDM for tooth finishing |
| Tolerance | ±0.005 mm on bore, ±0.02 mm on tooth profile, concentricity ≤0.01 mm |
| Surface finish | Ra 0.8 µm on bearing surfaces, Ra 1.6 µm on tooth flanks |
| Heat treatment | Induction hardening to HRC 50–55, carburizing, or through-hardening |
| Chain type | Roller chain, silent chain, leaf chain, engineering steel chain |
| Batch size | 1 to 100,000+ pieces, no MOQ |
| Inspection | CMM report, tooth profile chart, hardness test, material cert per batch |
| Lead time | 7 days for prototypes, 12–15 days for production runs |
We use CNC lathes with live tooling for one-setup machining. This keeps bore-to-tooth concentricity tight. For sprockets over 300 mm diameter, we switch to vertical machining centers with rotary tables. Every part is deburred and cleaned before inspection.
1. Batch-traceable quality. Each sprocket gets a unique serial number. We track the heat number, machine operator, tool path, and inspection results. If a part fails in your field, we trace it back to the exact batch and machine. No guesswork.
2. Inspection report per batch. You get a full dimensional report with every order. This includes tooth profile deviation, bore diameter, keyway dimensions, and surface roughness. We use a CMM and gear measuring machine. The report is signed by our QC engineer. You do not need to re-measure.
3. One factory for CNC, stamping, springs, and heat sinks. Your sprocket assembly might need a stamped cover plate, a spring tensioner, or a heat sink for the motor. We make all of them under one roof. This cuts your logistics cost and shortens your supply chain. One purchase order, one quality standard, one responsible party.
Custom CNC machining sprockets are not just for bicycles. We supply them for:
Our parts are made in China, but they meet ISO 9001 and TS 16949 standards. We export to automotive, packaging, and automation companies in Europe and North America. The tooth profile is cut to your drawing, not to a generic catalog.
Looking for a different part? We also machine Precision CNC Machined Automotive Parts | Custom Manufacturing No MOQ in the same Dongguan factory.
Q: Do you really have no MOQ? A: Yes. We machine 1 piece for prototyping at the same quality as 10,000. Our CNC machines are flexible. Setup time is the same, so we charge a small setup fee for small batches. For production runs, the setup fee is absorbed.
Q: How do you guarantee tolerance and quality? A: We use a CMM and gear measuring machine for 100% inspection on critical dimensions. For every batch, we provide a full inspection report. If a part is out of spec, we replace it at no cost. Our tolerance is ±0.005 mm on bores, which is tighter than most chain standards require.
Q: What is your lead time for custom sprockets? A: Prototypes ship in 7 days. Production runs of 500–5,000 pieces ship in 12–15 days. If you need faster, we can expedite with a 20% surcharge. We do not quote lead times we cannot meet.
Q: Do you provide material certificates? A: Yes. Every batch includes a mill test report from the steel mill. We also provide heat treatment certificates if you require hardening. All certificates are in English and traceable to the heat number.
Stop guessing. Send us your sprocket drawing, and we will give you a firm quote in 12 hours. No hidden costs, no vague promises. We will confirm material, tolerance, lead time, and price in one email.
Email: sc@bquq.com WhatsApp: +86 13713157787
We are a precision manufacturing factory in Dongguan, China. We have been machining sprockets for 20 years. Your drawing is our instruction. 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 |
