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Vancouver, WA 98685
phone: 360-574-7294
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Poly-Round® Inserts
MSC Material Selection Chart &
Applications to Avoid
4 Insert - NO Locking Sleeve
5 Insert w/ Locking Sleeve
6 Narrow Insert - NO Sleeve
7 Narrow Insert w/ Sleeve
A Radial Poly-Round® Bearings - A
B Radial Poly-Round® Bearings - B

PRODUCT SECTIONS
Ultimate Solutions®
ALL-ROUND® Solutions®
QuiKlean®
Solution® Polymer Housings
Solutions® Stainless Housings
ALL-ROUND® Bearings
Polymer Block Bearings
Poly-Round® Insert
Misc. Products
Poly-Round® Solution®
Stainless Ball Solution®
Stainless Take-Up Frames
Technical & Design
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H-MSC
LOCKING SLEEVES:
EDT stainless steel locking sleefes protect shaft surfaces from abrasion and normal wear caused by plane bearings.
Locking sleeves provide:
  • Improved bearing surface to increase bearing life
  • Contain lateral shaft movement (replaces standard locking collar)
  • Protection to shaft
  • Abrasion resistant
  • Repair damaged shafting
Locking sleeves can run on either side of the Poly-Round spherical insert, depending on the space available.
For locking sleeve details, see page F-9 - Red Section
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. Factors influencing PV limits (heat generation) include:
  • material selection
  • journal surface finish
  • bearing wall thickness
  • running clearance
  • proximity to moisture
  • ambient temperature
  • cycle time
HOW TO CALCULATE PV
PV
P
V
P



V		 - P x V
- pressure in PSI (lbs/sq in)
- velocity in SFM (surface ft/min)
- F/A
  where   F=force (load) on bearing
              A=shaft dia (in) x LTB
  (LTB= bearing length through the bore)
- .262 x D x RPM
  where   D=shaft diameter (in)
              RPM=shaft revolutions/min
(1) PV limits are shown for unlubricated radial bearing applications. Low temperature / submerged installation may permit PV limits up to 2x higher.
(2) Proper use of exclusionary seals can extend bearing life. Forsheda V-rings can be effective with any of EDT's plane bearings.

APPLICATIONS TO AVOID

  • 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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