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igus® Ltd.

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iglidur® W300 - Material data

The most important specifications at a glance

  • Good wear resistance at room temperature
  • Excellent friction coefficients
  • 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)
Material properties

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?


Maximum surface speed

m/s Rotary oscillating Linear
Constant 1 0,7 4
Short-term 2,5 1,8 6

Table 02: Maximum surface speeds

Permitted surface speeds

Even at higher surface speeds, the coefficients of friction of iglidur® W300 bearings do not increase. Therefore compared to other materials it can attain slightly higher surface speeds, for instance up to 1.5 m/s rotating and up to 5 m/s linear. Due to the extraordinary wear resistance, the bearing wear remains low also in long-term application with high speeds. Extremely high speeds can be attained with iglidur® W300 bearings on hardened, not too smooth shafts.

iglidur® W300 Dry Grease Oil Water
Coefficients of friction µ 0,08 - 0,23 0,09 0,04 0,04

Table 03: Temperature limits for iglidur® W300

Friction and wear

Just like the wear resistance, the coefficient of friction µ, friction coefficient in short, also alters with the load. In contrast to other iglidur® materials, the coefficient of friction of the iglidur® W300 remains constantly low even at higher peripheral speeds.
Fig. 04: Coefficients of friction according to the surface speed, p = 0.75 MPa, Cf53 shaft

X = Surface speed [m/s]
Y = Coefficient of friction μ
Fig. 05: Coefficients of friction dependent on the load v=0,01 m/s

X = Load [MPa]
Y = Coefficient of friction μ

Shaft materials

The friction and wear are also dependent, to a large degree, on the counter partner. Shafts that are too smooth, increase both the coefficient of friction and the wear of the bearing. Smooth shafts have the danger of stick-slip. Squeaking as an effect of stick-slip is usually the result of shafts that are too smooth. Shaft finishes of 0.4 to 0.5μm have proven best. For iglidur® W300, the wear resistance is still excellent with this surface finish as the friction adopts the minimum value. Diagram 06 shows results of testing different shafts. Hardened shafts are preferred for applications for higher loads. If the shaft material you intend to use is not included in the test results presented here, please contact us.
Shaft materials 
Wear with various shaft materials Fig. 06: Wear with various shaft materials p = 1 MPa, v = 0.3 m/s
 
X = Shaft material
Y = Wear [μm/km]
 
A = Aluminum, hard-anodized
B = machining steel
C = Cf53
D = Cf53, hard chrome-plated
E = St37
F = V2A
G = X90
Wear in oscillating and rotating applications Diagram 07: Wear on oscillating and rotating applications with shaft material Cf53 dependent on the load

X = load [MPa]
X = load [MPa]

A = rotating
B = oscillating

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 to 6 0 - 0,030 +0,020 +0,068 0 +0,012
> 6 to 10 0 - 0,036 +0,025 +0,083 0 +0,015
> 10 to 18 0 - 0,043 +0,032 +0,102 0 +0,018
> 18 to 30 0 - 0,052 +0,040 +0,124 0 +0,021
> 30 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

Table 07: Important tolerances for iglidur® W300 bearings according to ISO 3547-1 after the press-in.

Installation tolerances

iglidur® W300 bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit in a housing with h7 tolerance. After the installation in a housing with nominal diameter, the inner diameter of the bearing automatically adjusts to the E10 tolerance. In certain dimensions the tolerance in dependence on the wall thickness deviates from this (See delivery program )

Additional properties

Medium Resistance
Alcohols + to 0
Hydrocarbons +
Fats, oils, without additives +
Fuels +
Diluted acids 0 to -
Strong acids -
Diluted bases +
Strong bases 0
+ resistant      0 partially resistant      - non-resistant
All specifications at room temperature [+20°C] Table 05: Chemical resistance of iglidur® W300


Electrical properties

Specific forward resistance > 1013 Ωcm
Surface resistance > 1012 Ω

Chemical resistance

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

Radioactive rays

iglidur® W300 bearings are radiation resistant up to a radioactive intensity of 3 · 102 Gy.

UV-resistant

igubal® W300 plain bearings are permanently resistant against UV rays. A slight colour change influences the properties only insignificantly.

Vacuum

In vacuum, iglidur® W300 plain bearing degases. The use in vacuum is possible only limitedly.

Electrical properties

Bearings made of iglidur® W300 are electrically insulating.

Typical application areas

Woodworking industry

Woodworking industry

Printing industry

Printing industry

Beverage industry

Beverage industry


Consulting

I would be happy to answer your questions

Shipping and consultation

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Monday to Friday from 8am - 8pm.

Online:

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igus® GmbH points out that it does not sell any products of the companies Allen Bradley, B&R, Baumüller, Beckhoff, Lahr, Control Techniques, Danaher Motion, ELAU, FAGOR, FANUC, Festo, Heidenhain, Jetter, Lenze, LinMot, LTi DRiVES, Mitsubishi, NUM,Parker, Bosch Rexroth, SEW, Siemens, Stöber and all other drive manufacturers mention on this website. The products offered by igus® are those of igus® GmbH