NBK Japan MJC-55K-WH 1/2" to 22mm Jaw-type Flexible Coupling Outer Diameter - 2 1/8 inch (2.125") Silicon nitride ceramic balls are

Silicon nitride ceramic balls are lighter

Fitness equipment flywheels

ultra-light material that's great for high-performance or low-friction setups

✅ Inner Diameter (Shaft Size): 30mm

GRP212-60mm Bearing

NBK Japan MJC-55K-WH 1/2" to 22mm Jaw-type Flexible Coupling Outer Diameter - 2 1/8 inch (2.125") Silicon nitride ceramic balls areNBK Japan MJC 55K WH 1 2 inch to 22mm Jaw type Flexible Coupling NBK Japan MJC 55K WH 1 2 inch to 22mm Jaw type Flexible Coupling NBK Japan MJC 55K WH 1 2 inch to 22mm Jaw type Flexible Coupling, this is a Jaw type flexible coupling. The bellows allows eccentricity, angularmisalignment, and end play. Coupling Bore 1 Diameter: 1 2 inch Coupling Bore 2 Diameter: 22mm Coupling Length: 78 Coupling Outer Diameter: 55 Material: Stainless This is a jaw type