The SPB180-3-2517 pulley is a fundamental transmission component designed for medium-to-heavy loads and high-impact operating conditions. Compared with the SPA series, the SPB groove profile has a wid...
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OEM Custom Machining is the definitive solution when off-the-shelf components fail to meet the specific technical or spatial requirements of a mechanical system. This service bridges the gap between raw engineering concepts and fully functional machinery by transforming CAD drawings or physical samples into high-precision parts. OEM Custom Machining encompasses a wide array of manufacturing processes, including CNC turning, milling, gear hobbing, and specialized surface treatments. Engineers conduct DFM (Design for Manufacturability) analysis to optimize part geometry for cost and performance. Whether producing a single legacy replacement part or a batch of complex prototypes, OEM Custom Machining guarantees strict adherence to tolerances and material specifications. Protected by strict confidentiality agreements, this service empowers global manufacturers to innovate and maintain their equipment without being constrained by standard catalogs.
| Item | Specification |
| Processing method | OEM custom manufacturing to drawings / reverse-engineered custom manufacturing from samples |
| Supported files | PDF, CAD (DWG/DXF), STEP, IGS, or physical samples |
| Processes | Casting, forging, CNC turning, milling, gear hobbing, grinding, drilling, dynamic balancing |
| Machinable materials | HT250 gray cast iron, QT450 ductile iron, 45# steel, 40Cr, aluminum alloy, stainless steel, etc. |
| Machining size range | Outside diameter up to 1200mm as standard (extra-large sizes can be evaluated separately) |
| Machining accuracy | Standard dimensional tolerance ±0.05mm; high-precision fit surfaces up to ±0.01mm |
| Surface treatment | Black oxide, phosphating, galvanizing, electrophoresis, powder coating, bluing, etc. |
| Sampling lead time | Standard samples 5-10 working days (depending on process complexity) |
| Minimum order quantity | Flexible small-batch orders; single-piece sampling supported |
Shanghai Rentai Transmission Equipment Co., Ltd. is a manufacturer specializing in R&D, production and export of mechanical transmission components. Our main products include taper lock pulleys, taper lock bushes, timing pulleys, V-belts and timing belts. We also provide OEM & ODM custom service for non-standard transmission parts. Our factory covers over 8000 square meters, with more than 100 employees including 22 technical staff. We integrate casting, machining and finishing, equipped with CNC machines and testing instruments, with an annual casting output of 2000 tons. Supported by complete quality management system and international standards, our products are exported to Southeast Asia, Middle East, Europe and America, delivering reliable transmission solutions for global industrial clients.

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We are an integrated modern machinery manufacturer specializing in the production of internationally standard pulleys (S...

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