Met 90 Engineering Data
Let us assist you
Spadone-Alpha SLP LLC., P.O. Box 411, Westport, CT 06881
Call for a quote today! (800) 959-2529
Standard Clearances
For Temperatures Under 500 F
Shaft Size Running Clearance (inch) (Nominal) inches
1/2 to 1" .001 to .003
1-1/4 to 1-3/4 .002 to .004
1-7/8 to 2-3/4 .003 to .006
2-7/8 to 3-3/4 .006 to .008
3-7/8 to 5" .008 to .010
For Temperature Over 500 F
Shaft Size Running Clearance (inch) (Nominal) inches
1/2 to 1" .004 to .006
1-1/4 to 1-3/4 .005 to .007
1-7/8 to 2-3/4 .006 to .009
2-7/8 to 3-3/4 .007 to .010
3-7/8 to 5" .008 to .011
Temperatures
Met 90 Bearings are recommended for operating temperatures up to 600 F, and are used in applications where temperatures go up to 800 F. However, large temperature variations and different coefficients of thermal expansion in the bearing shaft and housing materials combine to produce distortions that make bearing dimensions and fits difficult to maintain. A varying clearance within the bearing can result. We recommend you review the details of your application with our staff.
Load Capacities
Met 90 Bearings are furnished to meet unit loadings of 1,000 to 3,500 psi. Actual load capacity will vary with bearing design and the bronze alloy used.
Met 90 Plates are furnished to meet a load capacity range up to 3,500 to 4,000 psi for slow speeds and 7,500 for static loads.
Coefficient of Friction
Met 90 Bearings will function at a coefficient of friction between 0.04 and 0.09 depending on the operating parameters of the bearing. For purposes of design, a coefficient of friction of 0.10 should be considered. Applications involving high temperature, a design coefficient of 0.15 is recommended.
Note: The COF of your application will depend on the alloy recommended and operating conditions
Wall Thickness
Met 90 Bearings require sufficient wall thickness to allow for proper seating of the lubricating plugs. The bearing wall thickness selected must be of sufficient strength to support the load while minimizing distortions which could alter bearing geometry.
Surface Finish
For most Met 90 applications, a finish of 63-125 RMS is sufficient. As loads and speeds increase, or where harder materials are used, improved surface finishes should be selected.
