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
MM9310WI 2H DUL	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 QUL	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
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 2.5000 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 2.5000 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 2.5000 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 2.5000 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 2.5000 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 2.5000 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 2.5000 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

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

MM9310WI 2H DUL

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 QUL

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

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 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 2.5000 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 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 2.5000 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 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 2.5000 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 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 2.5000 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 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 2.5000 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 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 2.5000 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 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 2.5000 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 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