Dry Bush


Self lubricating bearing with stainless steel backing provides high load carrying capacity and very high level of resistance in corrosive environments.

Features: Suitable for dry running, low coefficient of friction, lower
wear, good sliding characteristics, suitable for rotary and oscillating movement. Very high chemical resistance, low absorption of water and swelling. Also performs well with lubrication. Stainless steel backing provides improved corrosion resistance compared with SF-1 and SF-2.

Application: The high level of resistance in corrosion environment provides good application for chemical industry like chemical valve, chemical pump, flow meter, food industry and pharmaceutical industry etc.

Bearing PropertiesUnitValue
Maximum specific load Static N/mm²    Psi250      35500
Maximum specific load dynamicN/mm²    Psi140      20000
Maximum sliding speedm/s        fpm2.5       500
Maximum PxV factorN/mm² · m/s1.8
Maximum PxV factor 
(short periods)
N/mm² · m/s3.6
Dry coefficient of frictionµm   0.02   –    0.25
Maximum temperature°C        °F+280°C  +536°F
Minimum temperature°C        °F-200°C   -328°F
Shaft finish Ra (recommended)µm0.4 Ra
Shaft hardness  (recommended)HB 

Operating Conditions
DryVery good
OilVery good
Process fluidFair

Chemical Characteristics

TYPEAirVacuumWeak Acidmiddle AcidStrong Acid Alkali