Overview Reviews Product Description Standard L Type coupling hub materials are either sintered iron (L035-L190) or cast iron (L225-L276). The L Type coupling consists of two standard L Type hubs and one spider. Unless stated otherwise, hub torque and horsepower ratings assume a SOX(NBR) rubber spider is being used. Jaw coupling hubs are standard with one set screw, for two set screws see RRS & RRC sections. Fail-safe - will still perform if elastomer fails No metal to metal contact Resistant to oil, dirt, sand, moisture and grease More than 850,000 combinations of bore sizes Most types available from stock in 24 hours Timken Lovejoy Master Catalog Jaw Coupling Installation Guide Product Videos Custom Field Series L190 Shaft diameter RSB Material N/A Keyway size No keyway Coupling type Jaw coupler Product Reviews Write a Review Write a Review × Timken RSB Shaft Lovejoy® Jaw Style Coupling Half L190-HUB-STL-3/4RSB Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *