Modified Stock Gearing - Boston Gear

BOStonE F-1 Glass Filled Teflon Bearings
F
BOStonE F-1 glass filled material is completely self-lubricating
with outstanding wear and corrosion resistance properties,
machined from extruded rods to close tolerances. BOStonE F-1
material has a wide temperature capability and an excellent PV
value. BOStonE F-1 bearings are green in color.
Lubrication of these bearings is not required. Teflon®, the major
ingredient of BOStonE F-1 material (75%), has excellent selflubricating
characteristics and a low coefficient of friction. The
remaining 25% is glass.
BOStonE F-1 bearing material has excellent strength and
wearability and was developed to withstand high loads at
moderate speeds. The allowable operating temperature range is
–400° to +550°F.
Typical applications for BOStonE F-1 bearings are textile
machinery, farm implements, food processing equipment, pulp
and paper machinery, business machinery, aircraft, home
appliances, automotive and machine tools as well as many
others, in both the electrical and chemical fields.
Cylindrical, Flanged and Thrust Bearings and Solid Bars are
stocked in BOStonE F-1 material.
Selection
In general, sleeve bearings should be selected with a length of
one to two times the shaft diameter and an O.D. approximately
25% larger than the shaft diameter.
A general guide to determination of limiting load and velocity
values for sleeve bearings has been established by the use of PV
calculations. PV represents Pressure x Velocity, for example 100
psi x 20 fpm yields a PV of 2000.
Maximum PV value for BOStonE F-1 bearings: 20,000 (50,000
for intermittent service).
For complete selection and application information, see
Engineering Section, Pages 174-182.
P-1930-BG 04/10 Boston Gear 800-825-6544 155