DryLin® R - Special info on DryLin® R linear plain bearing series L1

Series L1 – Low-clearance press-fit bearings

The series L1 plain bearings are composed of the iglide® L100 bearing material, an extremely wear-resistant plastic compound. They are sub-divided into a press-fit area and a gliding range. The gliding range is composed of individual crossbars which are linked to each other by thin film bridges. These film bridges compensate the expansion of the bearing from heat or humidity. This separation enables the almost clearance-free design of the bearings, therefore also preventing clamping of the shaft. The cylinder-shaped press-fit area is also visually very distinct from the gliding area. The function of this area, which has a distinct clearance compared to the shaft, is to fix the bushing firmly in the housing by means of a press fit

Special features

Extremely high wear resistance
Low coefficient of friction
Vibration dampening
High static compressive strength
Good chemical resistance
Suitable for linear, rotating and oscillating movements
Extremely dirt repellent
Also suitable for soft and rough shafts

Compressive strength

iglide® plain bearings are homogeneously interfused with solid lubricants. Thereby lubricants can be totally avoided even at high loads. The iglide® L100 material allows an average static surface pressure of 10,150 psi. However it is to be taken into account that it can be calculated only with half of the projected bearing surface due to the discontinuation of the support.

Coefficients of sliding friction

Plain bearings of the L1 series are designed for dry operation against steel. The best results are attained with surface finishes of 0.8 μm. The coefficients of sliding friction reduces with increasing load. Typical values in dry operation are 0.2 to 0.3. But the value can be higher with unfavorable shafts.

iglide® L100	Rotary	Oscillating	Linear
Continuous (fpm)	295.3	295.3	1,575
Short term (fpm)	590.6	590.6	1,969
Table 04: Maximum surface speeds for iglide® L100

Surface speeds

The adjacent table shows potential surface speeds of L1 bearings. The maximum speeds are permitted in linear movements.

iglide® L100	Operation temperatures
Lower	-22°F
Upper, long-term	+212°F
Upper, short-term	+374°F
Table 05: Temperature limits for iglide® L100

Operating temperatures

Temperatures influence the compressive strength of the bearing, the wear and the firm fit of the bearing in the housing. A firm fit could be determined in all the tests up to a temperature of 158°F. A locking of the bearing in its seat is recommended for higher temperatures. With adequate locking, the L1 series plain bearings can be used even at temperatures over 266°F.