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

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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.

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Bore (d) (mm)

O.D. (D) (in)

O.D. (D) (mm)

Bearing Width (in)

Bearing Width (mm)

Total Width (in)

Total Width (mm)

Dynamic Radial Load Rating - 1M Revs (C1) (lbf)

Dynamic Radial Load Rating - 1M Revs (C1) (N)

Limiting Speed - Grease (rpm)

Limiting Speed - Oil (rpm)

Part Number	Rows per Set	Bore (d)	O.D. (D)	Bearing Width	Total Width	Contact Angle	Static Radial Load Rating (C0)	Dynamic Radial Load Rating - 1M Revs (C1)	Ball Type	CAD

MM9310WI 2H DUL	N/A Duplex	N/A 38.1 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 QUL	N/A Quadruplex	N/A 38.1 mm	N/A 2.8346 in72 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 10200 lbf45400 N	N/A 8150 lbf36300 N	N/A STEEL	N/A
MM9311WI 3H SUH	N/A Single	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H DUH	N/A Duplex	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H QUH	N/A Quadruplex	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H SUM	N/A Single	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H DUM	N/A Duplex	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H QUM	N/A Quadruplex	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H SUL	N/A Single	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H DUL	N/A Duplex	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9311WI 3H QUL	N/A Quadruplex	N/A 44.5 mm	N/A 3 in76.2 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 11400 lbf50700 N	N/A 8650 lbf38500 N	N/A STEEL	N/A
MM9313WI 5H SUH	N/A Single	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H DUH	N/A Duplex	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H QUH	N/A Quadruplex	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H SUM	N/A Single	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H DUM	N/A Duplex	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H QUM	N/A Quadruplex	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H SUL	N/A Single	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H DUL	N/A Duplex	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9313WI 5H QUL	N/A Quadruplex	N/A 57.2 mm	N/A 3.5433 in90 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 13700 lbf60900 N	N/A 9300 lbf41400 N	N/A STEEL	N/A
MM9316WI 3H SUH	N/A Single	N/A 76.2 mm	N/A 4.3307 in110 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 17300 lbf77000 N	N/A 10000 lbf44500 N	N/A STEEL	N/A
MM9316WI 3H DUH	N/A Duplex	N/A 76.2 mm	N/A 4.3307 in110 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 17300 lbf77000 N	N/A 10000 lbf44500 N	N/A STEEL	N/A
MM9316WI 3H QUH	N/A Quadruplex	N/A 76.2 mm	N/A 4.3307 in110 mm	N/A 0.625 in15.88 mm	N/A 2.5 in63.52 mm	N/A 60 º	N/A 17300 lbf77000 N	N/A 10000 lbf44500 N	N/A STEEL	N/A
MM9316WI 3H SUM	N/A Single	N/A 76.2 mm	N/A 4.3307 in110 mm	N/A 0.625 in15.88 mm	N/A 0.625 in15.88 mm	N/A 60 º	N/A 17300 lbf77000 N	N/A 10000 lbf44500 N	N/A STEEL	N/A
MM9316WI 3H DUM	N/A Duplex	N/A 76.2 mm	N/A 4.3307 in110 mm	N/A 0.625 in15.88 mm	N/A 1.25 in31.76 mm	N/A 60 º	N/A 17300 lbf77000 N	N/A 10000 lbf44500 N	N/A STEEL	N/A

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