Where to use EDT plane bearings
Tough applications where ball bearings don’t perform asreliably as desired, such as:
- Sanitary – HACCP
- High or low temperature
- Wash-down or steam
- Exposure to processing liquids, chemicals
- Incomplete rotation or oscillating motion
- Submerged in liquids
- Locations difficult to regularly maintain
- Exposed to bulk solid contaminants
Where to use EDT ball bearings
- High tension applications (V-belt drives, flat belt conveyors, urethane belts)
- High speed devices (fans, pumps, table top conveyors)
- Overhung loads (shaft mounted gear reducers)
- Trunnion applications
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Bearing capacity is measured by PV and will determine
the amount of heat generated in a plane bearing. PV is
the relationship of the load to the shaft speed in a bearing.
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HOW TO CALCULATE PV
PV - P x V
P - pressure in PSI (lbs./sq. in.)
V - velocity in SFM (surface ft./min.)
P - F/A
where F = force (load) on bearing
A = shaft dia (in.) x LTB
(LTB = bearing length through the bore)
V - .262 x D x RPM
where D = shaft diameter (in.)
RPM = shaft revolutions/min.
See PV Calculation Worksheet on page T4
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MATERIAL SELECTION CHART
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Performance in Moisture
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^T Dimensional Stability with Temp Change
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ALL-ROUND® Bearing Materials
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PV Limit
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Max Speed V (SFM)
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Max Loading P (PSI)
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Continuous Operating Temp.
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Wash-down
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Sub-merged
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Chemical Resistance
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Abrasion Resistance
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Impact Resistance
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USDA/FDA Contact Acceptance
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Bearings
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PA
UHMW
white
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1,000
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50
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800
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150°F
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Excellent
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Excellent
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Poor
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Excellent
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Abrasion applications are very unpredictable.
Each application must be tested for abrasion resistance.
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Excellent
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Direct
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AA
white
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2,000
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200
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1,000
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160°F
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Excellent
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Good
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Fair
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Fair
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Fair
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Direct
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OA
black
OE
brown
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5,000
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350
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1,000
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160°F
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Excellent
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Good
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Fair
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Fair
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Fair
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Incidental
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NA
grey
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6,000
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350
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2,000
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220°F
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Excellent
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Good
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Fair
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Fair
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Excellent
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Incidental
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FA
white
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6,000
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350
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1,000
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500°F
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Excellent
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Excellent
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Poor
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Excellent
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Excellent
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Direct
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QB
black-green
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50,000
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400
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3,000
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550°F
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Excellent
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Poor
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Excellent
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Fair
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Fair
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Incidental
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QF
black
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60,000
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400
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6,000
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500°F
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Excellent
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Excellent
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Excellent
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Excellent
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Fair
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Incidental
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MA
black-brown
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110,000
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400
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6,000
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600°F
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Excellent
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Poor
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Excellent
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Fair
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Fair
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Incidental
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Housings
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KG
polymer
housing
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Not a bearing material
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160°F
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Excellent
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Excellent
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Good
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Excellent
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N/A
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Good
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Incidental
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ZA
stainless
housing
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Not a bearing material
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1000°F
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Excellent
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Excellent
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Excellent
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Excellent
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N/A
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Excellent
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Direct
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