Clearance & Mounting Linear Ball Bearings
Ambient Working Temperature The ambient working temperature range for each PBC linear system depends on the model. Consult PBC Linear on use outside the
Frictional Resistance The static frictional resistance of the Simplicity ® linear system is so low that it is only slightly different from the kinetic frictional resistance, enabling smooth linear movement from low to high speeds. In general, the frictional resistance is expressed by the following equation. F = µ • W + f F : Frictional resistance µ : Coefficient of friction W : Load weight f : Sealing resistance The frictional resistance of each PBC Linear system depends on the model, load weight, speed, and lubricant. The sealing resistance depends on the lip interference and lubricant, regardless of the load weight. The sealing resistance of one linear system is about 200 to 500 gf. The coefficient of friction depends on the load weight, moment load, and preload.
recommended temperature range. Temperature conversion equation:
C = F - 32 5 9
F =32 + 9 5
C
AMBIENT WORKING TEMPERATURE Table 6
Linear System Type
Models
Ambient Working Temperature
Linear Ball Bearing
JP, EP, IP
-20 to 80°C, -4 to 176°F
COEFFICIENT OF LINEAR SYSTEM FRICTION ( µ ) Table 5
Linear System Type
Models
Coefficient of Friction ( µ )
Linear Bearing
JP, EP, IP
0.002 to 0.003
Lubrication and Dust Prevention
Using PBC Linear systems without lubrication increases the abrasion of the rolling elements, shortening the life span. Systems, therefore, require appropriate lubrication. PBC Linear ball bearings are shipped with an anti-corrosion treatment, which must be cleaned prior to applying grease or oil. For lubrication, PBC Linear recommends turbine oil conforming to ISO Standards G32 to G68 or lithium base soap grease No.2. Prior to usage, apply lubricant directly inside the linear bearing and shaft, and re-lubricate periodically according to the operating conditions. Some systems from PBC Linear are sealed to block dust out and seal lubricant in. If used in a harsh or corrosive environment a protective cover should be used.
156 Round Shaft Technology • pbclinear.com
Made with FlippingBook - professional solution for displaying marketing and sales documents online