18690/18620 NTN Tapered Roller Bearing 46.038x79.375x17.462mm

Tapered roller bearings are angular contact bearings comprised of separate components (cones and cups), facilitating installation. By design they are suitable for combined loading. They can sustain very high loads (axial load in one direction) and tolerate slight misalignment.

Always fitted oppositely with a bearing of the same nature, they provide high assembly stiffness, particularly when pre-loaded. Their load capacity associated with their versatility makes them the second most commonly used items, after radial-contact ball bearings.

d - Internal diameter	46,038 mm
D - External diameter	79,375 mm
B - Bearing/Inner ring width	17,462 mm
C - Outer ring width	13,495 mm
T - Total width	17,462 mm
d1 - External diameter inner ring	61 mm
a - Charge load application point	15,262 mm
Mass	0,331 kg

PRODUCT PERFORMANCE
C - Dynamic load	50,5 kN
C0 - Static load	56 kN
Cu - Fatigue limit load	6,8 kN
A2 - Rating life coefficient	1
e - Coefficient	0.37
Y0 - Static axial load coefficient	0.88
Y2 - Upper axial load coefficient	1.6
N lim - Oil lubrication limit speed	6200 tr/min
N lim - Grease lubrication limit speed	4600 tr/min
Tmin - Min operating temperature	-40 °C
Tmax - Max operating temperature	120 °C

ABUTMENT
da max - Max shoulder diameter IR	51 mm
db min - Min IR shoulder diameter	56 mm
Da max - Max shoulder diameter OR	71 mm
Db min - Min OR shoulder diameter	74 mm
ra max - Max fillet radius	2,8 mm
r1a - Max fillet radius	1,5 mm