Part Number	d - Bore	D - Outer Diameter	B - Width	Cr - Dynamic Radial Rating	Cor - Static Radial Rating	Grease lubrication	Oil lubrication
31068X2	340 mm	540 mm	86 mm	— N	— N	— rpm	— rpm
31038X2	190 mm	290 mm	51 mm	— N	— N	— rpm	— rpm