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iglide® Q - Material data

Materials table

General features Unit iglide® Q Test method
Density g/cm³ 1.40
Color Black
Max. moisture absorption at 73° F/50% R. H. Wt.-% 0.9 DIN 53495
Max. water absorption Wt.-% 4.9
Coefficient of surface friction, dynamic, against steel µ 0.05 - 0.15
p x v value, max. (dry) psi x fpm 16,000

Mechanical properties
Modulus of elasticity psi 652,700 DIN 53457
Tensile strength at 68° F psi 17,400 DIN 53452
Compressive strenght psi 12,910
Permissible static surface pressure (68° F) psi 14,500
Shore D hardness 83 DIN 53505

Physical and thermal properties
Max. long-term application temperature °F 275
Max. short-term application temperature °F 311
Min. application temperature °F -40
Thermal conductivity [W/m x K] 0.23 ASTM C 177
Coefficient of thermal expansion (at 73° F) [K-1 x 10-5 ] 5 DIN 53752

Electrical properties
Specific volume resistance Ωcm > 1015 DIN IEC 93
Surface resistance Ω > 1012 DIN 53482


Permitted p x v values

For iglide® Q plastic bushings with 0.039 inches wall thickness in dry operation against a steel shaft, at 68° F, installed in a steel housing.

iglide® Q plastic bushings were developed especially for extreme loads. Under high loads, iglide® Q figures among the iglide® materials that by far display the best wear resistance. From a radial load of 3625 psi, it outclasses even bushings made of the highly wear-resistant iglide® L280. Specific solid lubricants, integrated in the material in an extremely fine way, take care that the maintenance-free dry operation is guaranteed under any load.


Deformation under load and temperatures Deformation under load and temperatures

Compressive Strength

iglide® Q is a material used when high loads over 7250 psi are required. The graph shows the elastic deformation of iglide® Q with radial loads. Under the maximum recommended surface pressure of 14,500 psi, the deformation at room temperature amounts to less than 3 %.


Maximum surface speed

fpm Rotating Oscillating Linear
Constant 196 137 984
Short-term 393 275 1181

Permitted surface speeds

Under extreme radial loads, the iglide® Q plastic bushings can reach the maximum p x v values, which are possible in the dry operation with plastic bushings. Though the iglide® Q plastic bushings have the greatest advantages with high loads and low speeds, high surface speeds are also attainable due to this bushing's excellent coefficients of friction. The values stated in table show the speed at which the temperature rises to the maximum permitted value as a result of friction.


Maximum recommended surface pressure dependent on the temperature Maximum recommended surface pressure dependent on the temperature

Temperatures

The iglide® Q plastic bushings retain their excellent wear resistance in high temperatures as well. The upper long-term application temperature is 275° F. For a short-term, the material tolerates even 311° F. Due to various environmental influences, the press-fit of the bushings can also decline with low temperatures. For this reason, it may become necessary to fasten the bushing in the bore. Also note that the coefficient of friction strongly increases dependent on the temperature from about 212° F.

Temperature limits

iglide® Q Application temperature
Lower - 40 °F
Upper, long-term + 275 °F
Upper, short-term + 311 °F
Additional axial securing + 122 °F


Coefficients of friction dependent on the surface speed Coefficients of friction dependent on the surface speed, p = 108 psi constant

Friction and wear

Many dry-running plastic bushings feature decreasing coefficients of friction with increasing loads. iglide® Q surpasses the other iglide® bushings, which under high loads yet feature excellent coefficients of friction. Soon after the short run-in period, the coefficient of friction lowers to its final value. With these low coefficients of friction, iglide® Q is the right bushing material when the maximum wear resistance is required at extreme loads.

The counter partner too has significant influence on friction and wear. Extremely smooth shafts enhance the coefficient of friction of the bushing. For applications with high loads, we recommend hardened and ground surfaces with an average roughness range of 6 - 12 rms.

Coefficients of friction for iglide® Q against steel
(Shaft finish = 40 rms, 50 HRC)

iglide® Q Dry Grease Oil Water
Coefficients of friction µ 0.05 - 0.15 0.09 0.04 0.04

Coefficients of friction dependent on the load Coefficients of friction dependent on the load, v = 1.97 fpm
Coefficients of friction dependent on the shaft surface Coefficients of friction dependent on the shaft surface

Wear, rotating application with different shaft materials Wear, rotating application with different shaft materials, load p = 108 psi, v = 98 fpm
Wear, rotating application with different shaft materials Wear with various shaft materials in the rotating applications

Shaft materials

The graphs show results of testing different shaft materials with plastic bushings made of iglide® Q.

iglide® Q plastic bushings have a higher average wear rate at low loads, than bushings made of iglide® J or iglide® L280. However, the strength of iglide® Q plastic bushings is its wear resistance at heavy loads and in oscillating operation. In oscillating movements, iglide® Q perform best against hard chromed or machined steel shafts.

Please contact us in case the shaft material scheduled by you is not included in this list.

Wear with various shaft materials in the rotating operation Wear with oscillating and rotating applications with a 1050 hard chromed shaft
Wear with different shaft materials, oscillating and rotating movement Wear in oscillating and rotating applications with various shaft materials, p = 290 psi

Important tolerances for iglide® Q plastic bushings according to ISO 3547-1 after the press-fit.

Diameter
d1 [inch]
Shaft h9
[inch]
iglide® Q
E10 [inch]
Up to 0.019685 0 - 0.0009843 +0.000551 + 0.0021260
> 0.1181 to 0.2362 0 - 0.0011811 +0.000787 + 0.0026771
> 0.2362 to 0.3937 0 - 0.0014173 +0.000984 + 0.0032677
> 0.3937 to 0.7087 0 - 0.0016929 +0.001260 + 0.0040157
> 0.7087 to 1.1811 0 - 0.0020472 +0.001575 + 0.0048819
> 1.1811 to 1.9685 0 - 0.0024409 +0.001969 + 0.0059055
> 1.9685 to 3.1496 0 - 0.0029134 +0.002362 + 0.0070866

Installation tolerances

iglide® Q plastic bushings are standard bushings for shafts with h tolerance (recommended minimum h9).

After the installation in a housing bore with H7 tolerance, the inner diameter of the bushing automatically adjusts to the E10 tolerance.


Medium Resistance
Alcohol + to 0
Hydrocarbons, chlorinated +
Greases, oils, without additives +
Fuels +
Weak acids 0 to -
Strong acids -
Weak alkaline +
Strong alkaline 0
+ resistant      0 conditionally resistant      - non-resistant

Effect of moisture absorption Influence of moisture absorption of iglide® Q plastic bushings


Electrical properties

Specific volume resistance > 1015 Ωcm
Surface resistance > 1012 Ω

Chemical resistance

iglide® Q plastic bushings have a good resistance against chemicals. They possess an excellent resistance to organic solvents, fuels, oils and greases.

The material is only partially resistant to weak acids and alkalis. The moisture absorption of iglide® Q plastic bushings amounts to about 0,9% in standard climatic conditions. The saturation limit in water is 4,9%. This should be considered according to application conditions.

Radioactive rays

iglide® Q plastic bushings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.

UV-resistant

The tribological properties of the iglide® Q plastic bushings remain largely constant under climatic influences. However a minor embrittlement occurs in the material.

Vacuum

In application in vacuum, the potentially existent moisture content is degassed. For this reason only the dry iglide® Q plastic bushings are suitable for vacuum.

Electrical properties

Plastic bushings made of iglide® Q are electrically insulating.