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
MM9316WI 3H QUM	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 SUL	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 DUL	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 QUL	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
MM9321WI 3H SUH	N/A Single	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 0.875 in22.23 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H DUH	N/A Duplex	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 1.75 in44.46 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H QUH	N/A Quadruplex	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 3.5 in88.92 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H SUM	N/A Single	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 0.875 in22.23 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H DUM	N/A Duplex	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 1.75 in44.46 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H QUM	N/A Quadruplex	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 3.5 in88.92 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H SUL	N/A Single	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 0.875 in22.23 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H DUL	N/A Duplex	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 1.75 in44.46 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9321WI 3H QUL	N/A Quadruplex	N/A 101.600 mm	N/A 5.7087 in145 mm	N/A 0.8750 in22.23 mm	N/A 3.5 in88.92 mm	N/A 60 º	N/A 26000 lbf115700 N	N/A 12900 lbf57400 N	N/A STEEL	N/A
MM9326WI 6H SUH	N/A Single	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 0.875 in22.23 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H DUH	N/A Duplex	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 1.75 in44.46 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H QUH	N/A Quadruplex	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 3.5 in88.92 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H SUM	N/A Single	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 0.875 in22.23 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H DUM	N/A Duplex	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 1.75 in44.46 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H QUM	N/A Quadruplex	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 3.5 in88.92 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H SUL	N/A Single	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 0.875 in22.23 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H DUL	N/A Duplex	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 1.75 in44.46 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 N	N/A STEEL	N/A
MM9326WI 6H QUL	N/A Quadruplex	N/A 127 mm	N/A 7.0866 in180 mm	N/A 0.8750 in22.23 mm	N/A 3.5 in88.92 mm	N/A 60 º	N/A 42000 lbf186800 N	N/A 21200 lbf94300 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

MM9316WI 3H QUM

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 SUL

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 DUL

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 QUL

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

MM9321WI 3H SUH

N/A Single

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 0.875 in22.23 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H DUH

N/A Duplex

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 1.75 in44.46 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H QUH

N/A Quadruplex

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 3.5 in88.92 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H SUM

N/A Single

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 0.875 in22.23 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H DUM

N/A Duplex

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 1.75 in44.46 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H QUM

N/A Quadruplex

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 3.5 in88.92 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H SUL

N/A Single

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 0.875 in22.23 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H DUL

N/A Duplex

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 1.75 in44.46 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9321WI 3H QUL

N/A Quadruplex

N/A 101.600 mm

N/A 5.7087 in145 mm

N/A 0.8750 in22.23 mm

N/A 3.5 in88.92 mm

N/A 60 º

N/A 26000 lbf115700 N

N/A 12900 lbf57400 N

N/A STEEL

N/A

MM9326WI 6H SUH

N/A Single

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 0.875 in22.23 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H DUH

N/A Duplex

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 1.75 in44.46 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H QUH

N/A Quadruplex

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 3.5 in88.92 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H SUM

N/A Single

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 0.875 in22.23 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H DUM

N/A Duplex

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 1.75 in44.46 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H QUM

N/A Quadruplex

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 3.5 in88.92 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H SUL

N/A Single

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 0.875 in22.23 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H DUL

N/A Duplex

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 1.75 in44.46 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A

MM9326WI 6H QUL

N/A Quadruplex

N/A 127 mm

N/A 7.0866 in180 mm

N/A 0.8750 in22.23 mm

N/A 3.5 in88.92 mm

N/A 60 º

N/A 42000 lbf186800 N

N/A 21200 lbf94300 N

N/A STEEL

N/A