iglide® A350 - Material data

Deformation under load and temperatures

Surface Pressure

The graph shows the elastic deformation of iglide® A350 during radial loading. At the recommended maximum surface pressure of 2900 psi the deformation is less than 5%.

Maximum surface speeds

fpm	Rotating	Oscillating	Linear
Continuous	196	157	492
Short-term	236	177	590

Permitted surface speeds

iglide® A350 plastic bushings are suitable for low to medium speeds in both rotating and oscillating applications. Even linear motions can often be realized with iglide® A350.

With high sliding ,speeds, iglide® J or iglide® L250 can be interesting alternatives because the wear rate of these materials is better.

Recommended maximum permissible static surface pressure of iglide® A350 as a result of the temperature.

Temperatures

Its temperature resistance makes iglide® A350 an ideal material for a bushings in the food industry. The typical temperatures here reach up to +266°F, which is ideally covered by iglide® A350. Application temperatures up to +410°F are permitted on the short term. Please note that at temperatures over +284°F, the pressfit forces of the bushings may decrease and an additional axial securing device is recommended.
The wear rate of the iglide® A350 plastic bushings increases only minimally with higher temperatures. Tests have shown good wear results at +212°F on all tested shaft materials

iglide® A350	Application temperature
Minimum	- 148 °F
Upper, long-term	+ 356 °F
Upper, short-term	+ 410 °F
Additional axial securing	+ 284 °F

Coefficients of friction as a function of the running speed; p = 145 psi

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

Friction and wear

The coefficients of friction of iglide® A350 on a steel shaft is in the mid range. The friction decreases at temperatures, which is quite unusual in dry operation. The graph shows the connection. The wear rates of all tests with iglide® A350 show good results at a low level. The most wear resistant ones are often found among the iglide® plastic bushings for food contact.

iglide® A350	Dry	Grease	Oil	Water
Coefficients of friction µ	0,1 - 0,2	0,09	0,04	0,04

Coefficients of friction for iglide® A350 against steel (Shaft finish = 40 rms, 50 HRC)

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

Wear, rotating application with different shaft materials, p = 145 psi, v = 59 fpm

Shaft Materials

The corrosion-resistant steels are rather considered natural for use in the food industry. The trials were therefore carried out especially on such materials. It has been shown that there is no clear favorite 440B and hard chrome-plated steel are both suitable. Hard anodized aluminum is also well suited for both linear and rotating movements.

Medium	Resistance
Alcohols	+
Hydrocarbons, chlorinated	+ to 0
Greases, oils, without additives	+
Fuels	+
Weak acids	+
Strong acids	+
Weak alkaline	+
Strong alkaline	+

+ resistant      0 partially resistant      - non-resistant
All specifications at room temperature [+68°F]

Electrical properties

Specific volume resistance	> 1011 Ωcm
Surface resistance	> 1011 Ω

Chemical Resistance

iglide® A350 plastic bushings are resistant to diluted acids and alkalis, alcohols and detergents. They are also resistant to most lubricants. The iglide® A350 plastic bushings are resistant to common cleaning agents used in the food industry. iglide® A350 is affected by esters, ketones, chlorinated hydrocarbons, aromatics and highly polar solvents.

Radioactive rays

iglide® A350 plastic bushings are radiation resistant up to a radiation intensity of 2 x 10² Gy.

UV-resistant

iglide A350® plastic bushings are well resistant against UV rays.

Vacuum

In vacuum, iglide® A350 degases. The application in vacuum is possible only for dry bushings.

Electrical properties

iglide® A350 plastic bushings are electrically insulating.

Influence of moisture absorption of iglide® A350 plastic bushings

Moisture Absorption

The moisture absorption of iglide® A350 is low and can be disregarded when using standard bushings. Even at full saturation the iglide® A350 does not absorb more than 1.9% of water.

Maximum moisture absorption
by +23 °C/50 % r. F.	0,6 weight-%
Max. water absorption	1,9 weight-%

Diameter d1 [mm]	Shaft h9 [mm]	iglide® A350 F10 [mm]	Housing H7 [mm]
Up to 3	0 - 0,025	+0,006 +0,046	0 +0,010
> 3 bis 6	0 - 0,030	+0,010 +0,058	0 +0,012
> 6 bis 10	0 - 0,036	+0,013 +0,071	0 +0,015
> 10 bis 18	0 - 0,043	+0,016 +0,086	0 +0,018
> 18 bis 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

Installation tolerances

iglide® A350 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 bushing automatically adjusts to the F10 tolerance.