NNU4988 KOYO Double-row cylindrical roller bearings - TIMKEN BEARING MFG.CORP

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NNU4988 KOYO Double-row cylindrical roller bearings image

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NNU4988 KOYO Double-row cylindrical roller bearings Product Description

Series:18000
Cone Part Number:18200
Cup Part Number:18337
Design Units:Imperial
Bearing Weight:0.4 Kg
Cage Type:Stamped Steel
d:50.8 mm
D:85.725 mm
B - Cone Width:18.263 mm
C - Cup Width:12.700 mm
B:19.050 mm
R - Cone Backface To Clear Radius1:1.520 mm
r - Cup Backface To Clear Radius2:1.52 mm
da - Cone Frontface Backing Diameter:55.88 mm
db - Cone Backface Backing Diameter:58.93 mm
Da - Cup Frontface Backing Diameter:82.00 mm
Db - Cup Backface Backing Diameter:75.95 mm
Ab - Cage-Cone Frontface Clearance:2.3 mm
Aa - Cage-Cone Backface Clearance:1.8 mm
a - Effective Center Location3:2 mm
C90 - Dynamic Radial Rating (90 million revolutions)4:3560 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5:13700 lbf
C0 - Static Radial Rating:14400 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6:3470 lbf
K - Factor7:1.03
e - ISO Factor8:0.57
Y - ISO Factor9:1.06
G1 - Heat Generation Factor (Roller-Raceway):26.1
G2 - Heat Generation Factor (Rib-Roller End):20.3
Cg - Geometry Factor:0.0852

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TIMKEN BEARING MFG.CORP: Address346 North Bower Road, Macomb, IL 61336-2501 U.S.A.; Phone(Working Time)409-782-6227; Fax

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