Part Number	d - Bore	D - Outer Diameter	B - Width	Cr - Dynamic Radial Rating	Cor - Static Radial Rating	Reference speed	Limiting speed
NK38/20R	38mm mm	48mm mm	20mm mm	-	-	-	-
NK40/30R	40mm mm	50mm mm	30mm mm	-	-	-	-
NK38/30R	38mm mm	48mm mm	30mm mm	-	-	-	-
NK40/30R+IR35×40×30	35mm mm	50mm mm	30mm mm	-	-	-	-
NK40/20R+IR35×40×20	35mm mm	50mm mm	20mm mm	-	-	-	-
BK2216	22mm mm	28mm mm	16mm mm	-	-	-	-
BK2016	20mm mm	26mm mm	16mm mm	-	-	-	-
BK2512	25mm mm	32mm mm	12mm mm	-	-	-	-
BK2212	22mm mm	28mm mm	12mm mm	-	-	-	-
BK2516	25mm mm	32mm mm	16mm mm	-	-	-	-
BK2216	22mm mm	28mm mm	16mm mm	-	-	-	-
BK2520	25mm mm	32mm mm	20mm mm	-	-	-	-
BK2512	25mm mm	32mm mm	12mm mm	-	-	-	-
BK2816	28mm mm	35mm mm	16mm mm	-	-	-	-
BK2516	25mm mm	32mm mm	16mm mm	-	-	-	-
BK2820	28mm mm	35mm mm	20mm mm	-	-	-	-
BK2520	25mm mm	32mm mm	20mm mm	-	-	-	-
BK2912	9mm mm	13mm mm	12mm mm	-	-	-	-
BK2816	28mm mm	35mm mm	16mm mm	-	-	-	-
BK3012	30mm mm	37mm mm	12mm mm	-	-	-	-