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 American QD taper bush is a mainstream quick-release connecting component in European and American industrial transmission systems. It is secured by flange bolt locking and 4° taper expansion. It belongs to the same taper-bush family as the European-standard TB taper bush (8°), but differs clearly in locking structure and removal method.
| Item | Specification |
| Model | JA (full series includes JA/SH/SDS/SD/SK/SF/E/F/J/M/N/P) |
| Material | 45# steel / ASTM65-45-12 (QT450-10 ductile iron) |
| Taper angle | 4° external taper (core feature of QD type) |
| Bore type | Metric or imperial available |
| Bore coverage | 0.500 in ~ 5.938 in (12.7mm ~ 150.8mm, depending on the specific model) |
| Torque capacity | 1,000 in-lb (JA) ~ 250,000 in-lb (P) |
| Keyway type | Standard keyway / shallow keyway / keyless |
| Surface treatment | Black oxide / black phosphating |
| Matching fasteners | American standard UNC inch-size bolts |
| Installation method | Flange-face bolt locking, with jacking holes for quick removal |
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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