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UNGROUND (non-precision) and SEMI-PRECISION


Unground Bearing Numbering System

Class/Type Bore X OD Seals
UG ~ Unground
UGF ~ Unground, Flanged OD
UGFH ~ Unground, Flanged, Hex Bore
UGFS ~ Unground, Flanged, Extended
Inner Race w/Set Screws
UGT ~ Unground, Thrust Bearing
SP ~ Semi-Precision
SR ~ Snap Ring		 Bore (Inches) X OD (Inches) 2RS—2 Rubber Seals
ZZ—Two metal Shields

USDI Ungroung Bearings & Semi-Precision Bearings —ROUND BORE—NON-FLANGED

USDI P/N Interchange Interchange Bore X OD Seals
SP.500X1.125-2RS 1/2 X 1-1/8 2RS
UG.500X1.375 SR-381 A3244 1/2 X 1-3/8
SP.500X1.375-2RS 1/2 X 1-3/8 2RS
UG.500X1.750 A3256 1/2 X 1-3/4 2RS
SP.5625X1.375-2RS 9/16 X 1-3/8 2RS
UG.625X1.375 A4044 5/8 X 1-3/8
SP.625X1.375-2RS 5/8 X 1-3/8 2RS
UG.625X1.625 A4052 5/8 X 1-5/8
SP.625X1.625-2RS 5/8 X 1-5/8 2RS
SP.625X1.750-2RS 5/8 X 1-3/4 2RS
SP.750X1.625-2RS 3/4 X 1-5/8 2RS
SP.750X1.750-2RS 3/4 X 1-3/4 2RS
SP.750X2.00-2RS 3/4 X 2 2RS
SP.875X2.00-2RS 7/8 X 2 2RS
UG1.00X2.00 A6464 1 X 2
SP1.00X2.00-2RS 1 X 2 2RS
SP1.125X2.50-2RS 1-1/8 X 2-1/2 2RS
SP1.125X2.5625-2RS 1-1/8 X 2-9/16 2RS
SP1.3125X2.5625-2RS 1-5/16 X 2-9/16 2RS
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