Fafnir® Single Row Imperial Ball Screw Support Bearings (MM9-H) On The Timken Company

Timken® angular contact ball bearings are designed for combination radial and axial loading. Single-row bearings have high thrust capacity in one direction. Some single-row bearings are specifically designed for duplex mounting in sets for maximum performance.

Part Number	Rows per Set	d - Bore	D - Outer Diameter	Bearing Width	Total Width	Contact Angle	C0 - Static Radial Rating (per row)	Ce - Dynamic Radial Rating (per row)	Ball Type	CAD
MM9306WI 2H SUH	N/A Single	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H DUH	N/A Duplex	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H QUH	N/A Quadruplex	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H SUM	N/A Single	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H DUM	N/A Duplex	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H QUM	N/A Quadruplex	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H SUL	N/A Single	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H DUL	N/A Duplex	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9306WI 2H QUL	N/A Quadruplex	N/A 20 mm	N/A 1.8504 in47 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 5600 lbf24900 N	N/A 5600 lbf24900 N	N/A STEEL	N/A
MM9308WI 2H SUH	N/A Single	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H DUH	N/A Duplex	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H QUH	N/A Quadruplex	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H SUM	N/A Single	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H DUM	N/A Duplex	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H QUM	N/A Quadruplex	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H SUL	N/A Single	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H DUL	N/A Duplex	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9308WI 2H QUL	N/A Quadruplex	N/A 23.8 mm	N/A 2.4409 in62 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 8000 lbf35600 N	N/A 6700 lbf29800 N	N/A STEEL	N/A
MM9310WI 2H SUH	N/A Single	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9310WI 2H DUH	N/A Duplex	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9310WI 2H QUH	N/A Quadruplex	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9310WI 2H SUM	N/A Single	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9310WI 2H DUM	N/A Duplex	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9310WI 2H QUM	N/A Quadruplex	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 2.5000 in63.52 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9310WI 2H SUL	N/A Single	N/A 38.10 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A

Part Number

Rows per Set

d - Bore

D - Outer Diameter

Bearing Width

Total Width

Contact Angle

C0 - Static Radial Rating (per row)

Ce - Dynamic Radial Rating (per row)

Ball Type

CAD

MM9306WI 2H SUH

N/A Single

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H DUH

N/A Duplex

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H QUH

N/A Quadruplex

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H SUM

N/A Single

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H DUM

N/A Duplex

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H QUM

N/A Quadruplex

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H SUL

N/A Single

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H DUL

N/A Duplex

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9306WI 2H QUL

N/A Quadruplex

N/A 20 mm

N/A 1.8504 in47 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 5600 lbf24900 N

N/A STEEL

N/A

MM9308WI 2H SUH

N/A Single

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H DUH

N/A Duplex

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H QUH

N/A Quadruplex

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H SUM

N/A Single

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H DUM

N/A Duplex

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H QUM

N/A Quadruplex

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H SUL

N/A Single

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H DUL

N/A Duplex

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9308WI 2H QUL

N/A Quadruplex

N/A 23.8 mm

N/A 2.4409 in62 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 8000 lbf35600 N

N/A 6700 lbf29800 N

N/A STEEL

N/A

MM9310WI 2H SUH

N/A Single

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A

MM9310WI 2H DUH

N/A Duplex

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A

MM9310WI 2H QUH

N/A Quadruplex

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A

MM9310WI 2H SUM

N/A Single

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A

MM9310WI 2H DUM

N/A Duplex

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 1.25 in31.76 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A

MM9310WI 2H QUM

N/A Quadruplex

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 2.5000 in63.52 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A

MM9310WI 2H SUL

N/A Single

N/A 38.10 mm

N/A 2.8346 in72 mm

N/A 0.625 in15.88 mm

N/A 60 º

N/A 10200 lbf45400 N

N/A 8150 lbf36300 N

N/A STEEL

N/A