Surface Roughness Ra 0.05 Torque Capacity 15x28x7mm Structure Deep Groove Model Number 6902RS Ball Bearing 15*28*7 mm For Trx 1/10 1/7 1/18 Nitro Electric Coatings Chrome Steel Material Steel Brand Name NoEnName_Null Origin Mainland China Bearing Type Ball For Load Direction Radial Construction Single Row Seal Type Sealed Bore Dia (d) 15 mm Outer Dia (D) 28 mm Width (B) 7 mm Ring Material 52100 Chrome steel Ball Material 52100 Chrome steel Lubrication Grease Shaft Mount Type Press Fit Radial Clearance Trade No. C0 Grade Rating ABEC-3 Weight (grams) 15.31