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igus® inc.

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+1 401 438 7270
igus® inc.

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East Providence, RI

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iglide® J350 - Material data

Materials table

General features Unit iglide® J350 test method
Density g/cm³ 1,44
Color yellow
Max. moisture absorption at 73°F/50% R. H. Wt.-% 0.3 DIN 53495
Max. moisture absorption Wt.-% 1.6
Coefficient of surface friction, dynamic, against steel µ 0.10 - 0.20
P x v value, max. (dry) psi x fpm 13,000

Mechanical properties
Modulus of elasticity psi 290,100 DIN 53457
tensile strength at 68° F psi 7,977 DIN 53452
Compressive strength psi 8,702
Maximum recommended surface pressure (68° F) psi 8,702
Shore D hardness 80 DIN 53505

Physical and thermal properties
Upper long-term application temperature °F 356
Upper short-term application temperature °F 428
Lower application temperature °F -148
Thermal conductivity W/m x K 0.24 ASTM C 177
Coefficient of thermal expansion (at 73° F) K-1 x 10-5 7 DIN 53752

Electrical properties
Specific volume resistance Ωcm > 1013 DIN IEC 93
Surface resistance Ω > 1010 DIN 53482

Plastic Bushings Permitted p x v values  
Permitted p x v values

An outstanding bushing for rotating applications and for a wide range of different shaft materials. With iglide® J350 plastic bushings, the lifetime can often be increased for applications between 145 psi and 7,252 psi. In addition, the high temperature resistance makes it a very versatile material.

Permitted p x v values for iglide® J350 plastic bushings running dry against a steel shaft, at 68°F.

Deformation under load and temperatures

Deformation under load and temperatures

 
Surface pressure

iglide® J350 plastic bushings are adequate for medium and high loads. The graph shows the elastic deformation under different temperatures. At the recommended maximum surface pressure of 8702 psi the deformation is less than 6%.

Permissible surface speed

fpm Rotary Oscillating Linear
Constant 256 197 787
Short-term 591 453 1575

Permitted surface speeds

iglide® J350 plastic bushings are well suited for low and medium speeds, both in rotating and oscillating applications. The wear rates are much better in rotating applications. And linear motions can be well mounted with iglide® J350.

Recommended maximum permissible static surface pressure of iglide® J350 plastic bushing as a result of the temperature

 
Temperatures

The temperature resistance makes iglide® J350 the very universal material for plastic bushings in different industries. Application temperatures up to +428°F are permitted on the short term. At the temperatures above +302°F the bushing should be mechanically fixed in the bore. Higher temperatures may result in a loss of the pressfit of the plastic bushings, potentially allowing the bushing to drift within the housing bore.

The wear rate of the iglide® J350 plastic bushings changes very little at higher temperatures. Sometimes the wear decreases even at +212°F. Generally, the wear rates in the tests are very similar in temperatures between +68°F and +302°F.

The iglide® J350 is a highly wear-resistant plastic bushing, which can also be used at higher temperatures. The combination of excellent tribological and thermal properties fills a gap in the group of long life materials.

iglide® J350 Application temperature
Lower -148°F
Upper, long-term +356 °F
Upper, short-term +428 °F
Additional axial securing +302°F

Coefficients of friction dependent on the surface speed

Coefficients of friction as a function of the running speed, p = 108 psi

 
Friction and wear

The coefficients of friction of iglide® J350 in dry operation on a steel shaft is very good. It is even lower at high speed, which makes the material very suitable for permanently dry-running application at high rotation speed. iglide® J350 plastic bushings are clearly superior to other bushing materials in rotating applications over 290 psi. A lifetime of iglide® J350 can be several times higher.

iglide® J350 Dry Grease Oil Water
Coefficients of friction μ 0.10–0.20 0.09 0.04 0.04
Table 04: Coefficients of friction for iglide® J350 against steel (Shaft finish = 40 rms, 50 HRC)

Coefficients of friction dependent on the load

Coefficient of friction as a function of the load, v = 1.96 fpm

 
Coefficients of friction dependent on the shaft surface

Coefficient of friction as a function of the shaft surface (1050 hard chromed)

 
Wear, rotating application with different shaft materials

Wear of iglide® J350 with different shaft materials in rotational applications as a function of the pressure

 
Wear, oscillating application with different shaft materials

Wear of iglide® J350, oscillating movement of different shaft materials according to applied load

 
Shaft Materials

The graphs show results of testing different shaft materials with bushings made of iglide® J350. iglide® J350 plastic bushings can be combined with various shaft materials.

One shaft - bushing combination stands out when looking at the wear results of the test: iglide® J350 with 304 stainless steel. There are not many bushing materials that are suitable for the otherwise rather difficult shaft partner stainless steel and achieve best wear rates. Excellent wear results can also be observed with hard-anodized aluminum shafts. Please contact us in case the shaft material scheduled by you is not included here.

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

Chemical resistance of iglide® J350
All data given concerns the chemical resistance at room temperature (68° F)

Electrical properties

iglide® J350 plastic bushings are electrically insulating.

Specific volume resistance > 1013 Ωcm
Surface resistance > 1010 Ω

Chemical Resistance

iglide® J350 plastic bushings are resistant to diluted acids and alkalis, alcohols, detergents and lubricants. iglide® J350 is affected by esters, ketones, chlorinated hydrocarbons, aromatics and highly polar solvents.

Radioactive rays

iglide® J350 plastic bushings are radiation resistant up to a radioactive intensity of 2 x 102 Gy.

UV-resistant

iglide® J350 plastic bushings are partially resistant against UV rays.

Vacuum

In a vacuum, iglide® J350 plastic bushings outgas only to a very small extent. The application in vacuum is possible only for dry bushings.

Influence of moisture absorption of iglide® J350 plastic bushings

 
Moisture Absorption

The moisture absorption of iglide® J350 is low and can be disregarded when using standard bushings. Even at full saturation the iglide® J350 does not absorb more than 1,6% of water.

Diameter
d1 [mm]
Shaft h9
[mm]
iglide® J3
E10 [mm]
Housing H7
[mm]
Up to 3 0 - 0,025 +0,006 +0,046 0 +0,010
> 3 to 6 0 - 0,030 +0,010 +0,058 0 +0,012
> 6 to 10 0 - 0,036 +0,013 +0,071 0 +0,015
> 10 to 18 0 - 0,043 +0,016 +0,086 0 +0,018
> 18 to 30 0 - 0,052 +0,020 +0,104 0 +0,021
> 30 to 50 0 - 0,062 +0,025 +0,125 0 +0,025
> 50 to 80 0 - 0,074 +0,030 +0,150 0 +0,030

Table 07: Important tolerances for iglide® J350 bearings according to ISO 3547-1 after the press-in.

Installation tolerances

iglide® J350 plastic bushings are standard bushings for shafts with h-tolerance (recommended minimum h9). The bushings 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 bushings automatically adjusts to the F10 tolerance.