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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Rows per Set

d - Bore (mm)

D - Outer Diameter (in)

D - Outer Diameter (mm)

Bearing Width (in)

Bearing Width (mm)

Total Width (in)

Total Width (mm)

Ce - Dynamic Radial Rating (per row) (lbf)

Ce - Dynamic Radial Rating (per row) (N)

Limiting Speed (Grease) (per row) (rpm)

Limiting Speed (Oil) (per row) (rpm)

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

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