NTN 4T-3188/3120 Bearing

Part Number	4T-3188/3120
Brand	NTN
Type	Tapered roller bearings Inch series
Mass	0.603 kg
Boundary dimensions (mm)
Inner dia. (d)	31.75
Outer dia. (D)	72.626
Width (B)	29.997
ras max	0.8
Basic load ratings (kN)
Dynamic (Cr)	84.5
Static (Cor)	98
Basic load ratings (kgf)
Dynamic (Cr)	8600
Static (Cor)	9950
Limiting speed (min-1)
Grease	5500
Oil	7300

As for the maximum value for inner and outer ring diameters of bearings whose bearing numbers are marked with "+" (inner ring) and "++" (outer ring), the precision class is an integer for class 4 and class 2 bearings only. Bearings with a # symbol next to the serial number are J-series bearings, and have a different tolerance to other series. For more details, see “Bearing Tolerance” listed in the “NTN ‘Ball and Roller Bearings’ Catalog.”

Nodes have NTN 4T-3188/3120 bearings in stock. Tapered roller bearings (Inch series), are designed so the inner and outer ring raceway and the apex of the tapered rollers intersect at one point on the bearing centerline.