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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The 2M 25-tooth spiral bevel gear is the core component for 90-degree direction-changing transmission in compact precision machinery. Compared with an ordinary straight bevel gear, it uses a spiral tooth design together with tooth-surface hardening, and performs with outstanding smoothness in small-size, low-noise, medium-load applications.
| Item | Specification |
| Module at large end | 2M |
| Number of teeth | 25 |
| Shaft angle | 90° |
| Tooth profile | Spiral bevel gear (curved tooth) |
| Material | 45# steel / 40Cr (optional) |
| Heat treatment | Induction hardening of tooth surface |
| Surface treatment | Black oxide for rust protection |
| Bore diameter | 10mm (custom supported) |
| Tooth outside diameter | 53mm |
| Tooth length | 19mm |
| Overall height | 31mm |
| Hub diameter | 46mm |
| Hub height | 20mm |
| Transmission ratio | 1:1 (must be used in pairs with the same module and tooth count) |
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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