Product Details

NTN NK68/25R Needle bearings

Brand Name NTN
Model Number NK68/25R
Min.Order Quantity 1 pcs
Price Negotiable

Product Features

NTN NK68/25R bearing Size Chart (mm/inches)

Series64000
Cone Part Number64450W
Design UnitsImperial
Cage TypeStamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1108000 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)227900 lbf
d4.5000 in
B - Cone Width1.6250 in
R - Cone Backface To Clear Radius30.14 in
da - Cone Frontface Backing Diameter4.92 in
db - Cone Backface Backing Diameter5.16 in
Ab - Cage-Cone Frontface Clearance0.11 in
Aa - Cage-Cone Backface Clearance0.2 in
a - Effective Center Location40.05 in
C90 - Dynamic Radial Rating (90 million revolutions)516000 lbf
C1 - Dynamic Radial Rating (1 million revolutions)661800 lbf
C0 - Static Radial Rating94200 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)714100 lbf
K - Factor81.13
G1 - Heat Generation Factor (Roller-Raceway)218.8
G2 - Heat Generation Factor (Rib-Roller End)45.3
Cg - Geometry Factor0.115
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