Tapered roller bearing LM603049-LM603012-KOYO,
Inner diam. 45.24 mm, Outer diam. 77.79 mm, Width 21.43 mm, Weight 0.395 kg
This is the most basic and most widely used type of tapered roller bearing.
It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring).
It is typically mounted in opposing pairs on a shaft.Specifications Series LM603000 Cone Part Number LM603049 Cup Part Number
LM603012 Design Units Imperial Bearing Weight 0.400 Kg 0.80 lb Cage Type Stamped Steel Dimensions d – Bore 45.242 mm 1.7812 in D –
Cup Outer Diameter 77.788 mm 3.0625 in B – Cone Width 19.842 mm 0.7812 in C – Cup Width 16.667 mm 0.6562 in T –
Bearing Width 21.430 mm 0.8437 in Abutment and Fillet Dimensions R – Cone Backface “To Clear” Radius1 3.560 mm 0.14 in r –
Cup Backface “To Clear” Radius2 0.76 mm 0.030 in da – Cone Frontface Backing Diameter 52.07 mm 2.05 in db – Cone Backface Backing
Diameter 57.91 mm 2.28 in Da – Cup Frontface Backing Diameter 74.68 mm 2.94 in Db – Cup Backface Backing Diameter 70.10 mm 2.76 in Ab –
Cage-Cone Frontface Clearance 2 mm 0.08 in Aa – Cage-Cone Backface Clearance 0.8 mm 0.03 in a – Effective Center Location3 -2.3 mm -0.09 in
Basic Load Ratings C90 – Dynamic Radial Rating (90 million revolutions)4 19800 N 4450 lbf C1 – Dynamic Radial Rating
(1 million revolutions)5 76300 N 17200 lbf C0 – Static Radial Rating 77900 N 17500 lbf Ca90 – Dynamic Thrust Rating (90 million revolutions)
6 14500 N 3250 lbf Factors K – Factor7 1.37 e – ISO Factor8 0.43 Y – ISO Factor9 1.41 G1 – Heat Generation Factor (Roller-Raceway) 26.4 G2
Heat Generation Factor (Rib-Roller End) 14.4 Cg – Geometry Factor 0.0785
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