C93200 (SAE 660) STRAIGHT CAST BRONZE SLEEVE BEARINGS

Anchor Bronze & Metals, Inc. offers cast bronze sleeve bearings in over 900 sizes from stock. Cast bronze sleeve bearings are available as plain sleeve bearings, grease or oil grooved bearings, graphite-filled grooved bearings and in graphite-filled plug type bearing configurations. Special alloy and machined to print bronze bearings are available up to 124" (3147mm) in diameter.

C93200 (SAE 660) Bronze Sleeve Bearing Sizes:
       3/16" ID through 1/2" ID        1-3/8" ID through 1-1/2" ID
       9/16" ID through 11/16" ID        1-9/16" ID through 1-7/8" ID
       3/4" ID through 7/8" ID        1-15/16" ID through 2-3/8" ID
       15/16" ID through 1-1/8" ID        2-7/16" ID through 3" ID
       1-3/16" ID through 1-5/16" ID        3-1/4" ID through 5" ID
Do you need to make modifications to your bearings?

Running Clearance (Click photo to enlarge)

bearingsc.jpg (26880 bytes)Greater than normal clearance must be allowed: (1) if exceptionally high speed is involved or (2) if higher than normal loading is encountered.

 

Press Fits (Click photo to enlarge)

bearingpf.jpg (23490 bytes)Less than normal press fit proves satisfactory: (1) if the bearing is long and the wall is not exceptionally thin and (2) if the bearing is also carrying a moderate load exerted in one direction.

     

PV Calculation:

PV is a means of measuring the performance capabilities of bearings. P is expressed as pressure or pounds per square inch on the area of the bearing. V is velocity in feet per minute of the wear surface (surface feet per minute).

For sleeve bearings, the surface speed is .262 (pi÷12) x RPM x shaft diameter in inches. P is equal to the load on the bearing in pounds divided by the projected area in square inches. For sleeve bearings, the projected area is the length x the inside diameter of the bearing. PV is then obtained by multiplying P x V as shown in the following example:

3/4" shaft @ 341 RPM, 90 lb. total load, bearing length 1".

V = .262 x RPM x shaft diameter, or .262 x 341 x .750 = 67 sfpm.

P = total load ÷ projected area (area = .750 x 1.0 = .75 in.), or 90 lbs. ÷ .75 = 120 psi.

PV = 120 psi x 67 sfpm = 8040 PV

Bearing Tolerances:

 Inside Diameter under 3"............................... Plus or minus .001"

Inside Diameter 3" and Over........................ Plus or minus .0015"

Outside Diameter up to and including 3".......... Plus .002" to .003"

Outside Diameter above 3"............................. Plus .003" to .005"

All Lengths.................................................. Plus or minus .005"

Normal Concentricity....................................... 0.003 T.I.R. MAX.

 

Minimum Physical Properties:

Copper.................................................................. 81.0 - 85.0%

Tin............................................................................ 6.3 - 7.5%

Lead......................................................................... 6.0 - 8.0%

Zinc.......................................................................... 2.0 - 4.0%

All Lengths.................................................. Plus or minus .005"

 

Chemical Composition:

Tensile Strength, PSI .................................................... 35,000

Yield Strength, PSI ....................................................... 20,000

Elongation in  2 inches .................................................... 10%

Brinell Hardness @ 500 KG Load ........................................ 65

 

Pressure & Velocity Ratings:

Max. PV ................................................................. 75,000

Max. P ..................................................................... 4,000

Max. V ....................................................................... 750

Maximum operating temperature for C93200 (SAE 660) = 450º

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