iglide® L280
In applications where all other materials have shown insufficient operating life, iglide L280 bearings can be
the solution. This material was developed specifically for applications requiring particularly high performance.
iglide L280 is designed specifically for high abrasion resistance. The material is based on a tough thermoplastic
alloy, a matrix comprising highly abrasion-resistant fibers and a friction-reducing solid lubricant mix (Illustration
X). The crystalline structure of the thermoplastic alloy supplies additional wear resistance.
Typical applications for iglide L280 materials include computer printers, electrical switches, textile machines,
pneumatic cylinders, high frequency electric magnets, automatic installation equipment for three-phase operation,
as well as the automobile sector, e.g., clutches.
Special Characteristics of iglide L280
Performance increases 3 to 6 times compared to other iglide bearings
Also suited for soft shafts
Low coefficient of friction
Vibration dampening properties
Dirt resistant
Highly resistant to chemicals Thin wall section Suited for rotating, oscillating and linear motion
P x V Values
The permissible maximum P x V values of iglide L280 go up to 28,000 psi x fpm. Compared to iglide G300, iglide
L280 shows lower capacity at high loads, but performs better at high speeds. With linear motion, it can handle
up to 975 fpm.
iglide L280 is particularly suitable at high frequency angular movements, as well as linear motion.
Additional lubrication reduces friction while general load capacity is increased.
Maximum surface speed of iglide L280 during dry operation in fpm.
|
Rotating
|
Oscillating
|
Linear
|
| Continuous |
295
|
390
|
975
|
| Short Duration |
490
|
590
|
1180
|
Compressive Strength
Permissible unit pressure is temperature dependant. At 275°F, iglide L280 still maintains a load capacity of
7250 psi. Even at temperature ranges up to 410°F short-term loading permissible.
In addition, iglide L280 flanged bushings are capable of absorbing the same axial pressures.
Coefficient of friction
The coefficient of friction for iglide L280 during dry operation with steel ranges between 0.08 and 0.15. iglide
L280 maintains consistently low friction value over the P • V range, even at higher speeds.
During the “start-up” phase, friction values are initially high, yet gradually reduce to their permanent value,
as sufficient microscopic abrasions are created for the bearing surface.
Permanent lubrication of iglide L280 with grease, oil, water or other liquids reduces friction by creating a hydro-dynamic
lubricant film .
Coefficient of friction for iglide L280 with steel.
|
|
Dry
|
Grease
|
Oil
|
Water |
| iglide L280 |
0.08 - 0.15
|
0.09
|
0.04
|
0.04
|
|
| Steel shaft: Hardness 50 Rc, Ra=16-32 rms |
|
|
|
|
|
Operating Temperatures
At operating temperatures below 250°F wear remains at a minimum. Wear ratios increase directly in proportion
to the increase in temperatures.
With iglide L280, the maximum temperature for continuous use is 275°F. If temperatures rise above this level,
the material will become brittle and will lose some of its abrasion resistance during continuous operation. Consequently,
calculation of the expected bearing temperature is the most significant factor effecting bearing performance.
Temperatures about 175°F will reduce the pressed-in fit of iglide L280 bearings. At temperatures above 175°F
we recommend bonding the bearings into the housing. iglide L280 can sustain loads at temperatures up to 410°F
Operating temperatures for iglide L280
|
Wear
|
Continuous
|
Short |
|
Limit
|
Operation
|
Duration
|
|
250°F
|
275°F
|
410°F |
Bearing Life
Tests conducted relative to friction values, temperature resistance and wear characteristics provided data of life
expectancy during dry operation.
iglide L280 bearings have high performance, especially in applications where abrasion resistance is significant.
Here are some examples of additional problem-solving solutions utilizing iglide L280.
Due to very high abrasion levels, operating life of less than 4 weeks were reached during linear shaft movements
in a textile machine. iglide L280 bearings operate for several years without any signs of abrasion.
The linear movement of a carriage: iglide L280 bearing triple previous performance (98,000 ft.) at the same abrasion
levels (0.0008”).
In a rotating application with continuously changing rotary direction, a test run with another material produced
abrasion levels of .002 in.
iglide L280 proved its superior abilities during the same test: no apparent abrasion occurred during the entire
test procedure.
During an application involving high frequency linear motion, iglide L280 bearings achieved a 300% higher life
than the best metallic bearings.
Electrical Properties
iglide L280 bearings are electrically isolating. The specific resistance is > 1013 Ohm/cm.
Radiation Resistance
Gamma rays with an intensity below 10 MRad do not have a measurable influence on wear. Ray intensity in excess
of 10 MRad can reduce important mechanical properties by 50%.
Vacuum
iglide L280 bearings can be put to unlimited use under vacuum conditions.
Weather Resistance
glide L280 bearings are resistant to UV radiation and corrosion.
Chemical Resistance
iglide L280 bearings are resistant to standard organic solutions, alkaline solutions, ketones, gas, oil, grease
as well as to most weak organic and inorganic acid solutions.
Shaft Materials
iglide L280 works very well with most shaft materials as indicated below
iglide L280 and Shaft Materials
| Shaft Material |
Motion |
Result |
| Hardened Steel |
Rotating |
Very Suitable |
| Aluminum |
Rotating |
Not Suitable |
| Brass |
Axial |
Not Suitable |
| Anodized Aluminum |
Rotating |
Suitable |
| Non-Hardened Steel |
Rotating |
Suitable |
| Chrome-Coated Steel |
Rotating |
Suitable |
| Nickel-Coated Steel |
Rotating |
Very Suitable |
| Special Steel |
Rotating |
Very Suitable |
Best values for friction and wear can be achieved with the combination of hardened steel, 50Rc, Ra= 16-32 rms.
Suitability of the other shaft materials listed depends on all other load related data. We would be happy to assist
you in your choice of material.
iglide L280 Running Clearance (in inches)
| Nominal ID |
Max. |
Min. |
| 0.1250 |
0.0033 |
0.0008 |
| 0.1875 |
0.0034 |
0.0008 |
| 0.2500 |
0.0040 |
0.0008 |
| 0.3125 |
0.0042 |
0.0010 |
| 0.3750 |
0.0042 |
0.0010 |
| 0.4375 |
0.0050 |
0.0013 |
| 0.5000 |
0.0050 |
0.0013 |
| 0.5625 |
0.0050 |
0.0013 |
| 0.6250 |
0.0050 |
0.0013 |
| 0.6875 |
0.0051 |
0.0014 |
| 0.7500 |
0.0062 |
0.0016 |
| 0.8125 |
0.0062 |
0.0016 |
| 0.8750 |
0.0062 |
0.0016 |
| 1.0000 |
0.0062 |
0.0016 |
| 1.1250 |
0.0062 |
0.0016 |
| 1.2500 |
0.0076 |
0.0020 |
| 1.3750 |
0.0076 |
0.0020 |
| 1.5000 |
0.0076 |
0.0020 |
| 1.6250 |
0.0076 |
0.0020 |
| 1.7500 |
0.0076 |
0.0020 |
| 2.0000 |
0.0088 |
0.0024 |
| 2.2500 |
0.0088 |
0.0024 |
|
iglide L280 Running Clearance (in mm)
| Nominal ID |
Max. |
Min. |
| 2 mm |
.079 |
.014 |
| 3 mm |
.079 |
.014 |
| 4 mm |
.098 |
.020 |
| 5 mm |
.098 |
.020 |
| 6 mm |
.098 |
.020 |
| 7 mm |
.119 |
.025 |
| 8 mm |
.119 |
.025 |
| 9 mm |
.119 |
.025 |
| 10 mm |
.119 |
.025 |
| 12 mm |
.145 |
.032 |
| 13 mm |
.145 |
.032 |
| 14 mm |
.145 |
.032 |
| 15 mm |
.145 |
.032 |
| 16 mm |
.145 |
.032 |
| 17 mm |
.145 |
.032 |
| 18 mm |
.145 |
.032 |
| 19 mm |
.167 |
.040 |
| 20 mm |
.176 |
.040 |
| 22 mm |
.176 |
.040 |
| 24 mm |
.176 |
.040 |
| 25 mm |
.176 |
.040 |
| 28 mm |
.176 |
.040 |
| 30 mm |
.176 |
.040 |
| 32 mm |
.212 |
.050 |
| 35 mm |
.212 |
.050 |
| 38 mm |
.212 |
.050 |
| 40 mm |
.212 |
.050 |
| 45 mm |
.212 |
.050 |
| 50 mm |
.212 |
.050 |
| 55 mm |
.254 |
.060 |
|
| 
