NTN 4T-30212 tapered roller bearings

385 Series are 384ED Cup Part Number a few brands you will find in our inventory. Find NTN 4T-30212 tapered roller bearings to see what’s in stock!

Series	385
Cone Part Number	387-S
Cup Part Number	384ED
Design Units	Imperial
Bearing Weight	3.12 lb
Cage Type	Stamped Steel
Ab – Cage-Cone Frontface Clearance	0.11 in
d	2.2500 in
D	3.9370 in
B – Cone Width	0.8640 in
C – Double Cup Width	1.5620 in
T – Bearing Width across Cones	1.9369 in
R – Cone Backface To Clear Radius1	0.03 in
r – Cup Frontface To Clear Radius2	0.03 in
db – Cone Backface Backing Diameter	2.52 in
Da – Cup Frontface Backing Diameter	3.68 in
Aa – Cage-Cone Backface Clearance	0.03 in
C90 – Dynamic Radial Rating (One-Row, 90 million revolutions)3	6280 lbf
C1 – Dynamic Radial Rating (Two-Row, 1 million revolutions)4	42200 lbf
C90(2) – Dynamic Radial Rating (Two-Row, 90 million revolutions)5	10900 lbf
Ca90 – Dynamic Thrust Rating (90 million revolutions)6	3810 lbf
K – Factor7	1.65
e – ISO Factor8	0.35
Y1 – ISO Factor9	1.91
Y2 – ISO Factor10	2.84
G1 – Heat Generation Factor (Roller-Raceway)11	42
G2 – Heat Generation Factor (Rib-Roller End)	15.7
Cg – Geometry Factor12	0.0859

Detailed Parameters

parameter：

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