RS type coupler for metal lathes Type: RS type coupler D (Outside diameter): 15 mm L (Inside length): 20 mm d1 (bore options): 2 mm, 3 mm, 3.17 mm, 4 mm, 5 mm, 6 mm, 6.35 mm, 7 mm, 8 mm Key benefits and practical notes Versatile bore compatibility: available in multiple d1 bore sizes to fit a range of shafts commonly used with RS type couplers. Compact dimensions: D 15 mm and L 20 mm provide a compact coupling option suitable for tight lathe installations. Clear specification set: precise outside diameter, inside length, and bore options help ensure a proper fit in your metal lathe setup. Standardized RS type coupling: designed to integrate with RS type components for straightforward replacement or upgrade. Typical use scenarios Replacing a worn or damaged coupler on a small bench lathe, using a 3 mm or 3.17 mm bore to match the shaft. Upgrading a lathe or fixture where a 6 mm or 6.35 mm bore is required to connect a spindle or motor shaft. Custom or prototype work where different shaft diameters are needed, allowing quick swaps among the listed bore sizes without changing the entire assembly.