Step Up Adapters are ideal for making the shaft larger. Clamping coupling portion will not mar the shaft. Adapters eliminate the need for complete shaft replacement.
Unit of Measure


Bore Size

N/A 7/8 in


N/A No Keyway

Shaft Size

N/A 1 1/8 in

Overall OD

N/A 1 7/8 in

Overall Length

N/A 4.375 in

Shaft Length

N/A 2.000 in

Bore Depth

N/A 1.875 in


N/A Steel, ASTM A108


N/A Black Oxide

Clamp Screw

N/A Hex Socket Cap Screw, 3A Thread, Steel, ASTM A574: 1/4-28 x 5/8

Approximate Weight

N/A 31.80 oz

UPC Code

N/A 044861046227

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