iglidur® W300 - Material data

The most important specifications at a glance

Good wear resistance at room temperature
Excellent coefficient of friction
Low moisture absorption
High media resistance
Resistant to edge pressure
Resistant to shocks and impacts
Resistant to dirt and dust
Resistant to high loads (>60N/mm²)

When do I use this material?

When an economical all-round performance bearing is required
For low to average surface speeds
When the bearing needs to run on different shaft materials
For pivoting and rotational movements

When do I use a different material?

If mechanical reworking is required
iglidur® M250, sleeve bearing
When universal chemical resistance is required
iglidur® Xsleeve bearing
When temperatures are constantly higher than +130°C
iglidur® H, sleeve bearing
iglidur® Xsleeve bearing
iglidur® H370, sleeve bearing
For use under water
iglidur® H370, sleeve bearing

Permissible sliding speeds

Even at higher sliding speeds, the coefficient of friction for iglidur® W300plain bearings does not increase. Slightly higher sliding speeds can therefore be achieved compared to other materials, for example up to 1.5 m/s rotating and up to 5 m/s linear. Due to the exceptional wear resistance, the bearing wear remains low even during prolonged use at high speeds. iglidur® W300 bearings achieve particularly high speeds on hardened, not too smooth shafts.

Maximum surface speed

m/s	Rotating	Oscillating	linear
permanent	1	0.7	4
Short-term	2.5	1.8	6

Surface Speedp x v value and lubrication

Friction and wear

Like the wear resistance, the coefficient of friction μ also changes with the load. Unlike the other iglidur®materials, the coefficient of friction of iglidur® W300 remains constantly low even at higher circumferential speeds.

Temperature limits for iglidur® W300

iglidur® W300	dry	Greases	Oil	Water
Coefficients of friction µ	0,08 - 0,23	0.09	0.04	0.04

Coefficient of frictionWear resistance

diagram. 04: coefficient of friction as a function of the surface speed, p = 0.75 MPa, shaft from Cf53

Diagram 05: Coefficient of friction as a function of the pressure, v = 0.01m/s

Shaft materials
Friction and wear are also highly dependent on the mating partner. Shafts that are too smooth increase both the coefficient of friction and the wear of the bearing. Smooth shafts harbour the risk of stick-slip. Squeaking as an effect of stick-slip is usually the result of shafts that are too smooth. Shaft roughness of 0.4 to 0.5 μm has proven to be the best. At iglidur® W300 in particular, the wear resistance with this surface finish is still very good, while the friction is at its lowest. diagram. 06 shows an extension of the results of tests with different shaft materials. Hardened shafts are preferable, especially for higher loads. If your intended shaft material is not included in the test results presented here, please contact us.
Shaft materials

Wear in oscillating and rotating applications

Installation tolerances

iglidur® W300-plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed to be pressed into an H7-toleranced mounting. After installation in a mounting with nominal dimensions, the inner diameter of the bearing automatically adjusts to tolerance E10; for certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).

Important tolerances for iglidur® W300 bearings according to ISO 3547-1 after press-fitting

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® W300 E10 [mm]	Housing H7 [mm]
up to 3	0 - 0.025	+0.014 +0.054	0 +0.010
> 3 up to 6	0 - 0.030	+0.020 +0.068	0 +0.012
> 6 up to 10	0 - 0.036	+0.025 +0.083	0 +0.015
> 10 up to 18	0 - 0.043	+0.032 +0.102	0 +0.018
> 18 up to 30	0 - 0.052	+0.040 +0.124	0 +0.021
> 30 up to 50	0 - 0.062	+0.050 +0.150	0 +0.025
>50 to 80	0 - 0.074	+0.060 +0.180	0 +0.030
>80 to 120	0 - 0.087	+0.072 +0.212	0 +0.035
>120 to 180	0 - 0.100	+0.085 +0.245	0 +0.040

Additional properties

Chemical resistance

iglidur® W300 bearings have good resistance to chemicals. They are resistant to most lubricants. iglidur® W300 is not attacked by most weak organic and inorganic acids.