INA track rollers are precision machine elements. These products must be very carefully handled before and during fitting. Their trouble-free operation depends largely on the care taken during fitting.
The products must be protected against dust, contaminants and moisture. Contaminants have a detrimental influence on the running and operating life of rolling bearings.
Do not cool the bearings excessively. Moisture due to condensation can lead to corrosion in the bearings and bearing seats.
Yoke type track rollers RSTO and STO are not self-retaining. The outer ring and the needle roller and cage assembly are matched to each other and must not be interchanged during fitting with components from other bearings of the same size.
The assembly area must be kept clean and free from dust.
Check the seat of the axis for dimensional and geometrical accuracy and cleanliness.
Lightly oil the bearing ring seating surfaces or rub with solid lubricant.
After fitting, the bearings must be supplied with lubricant. Finally, check the correct functioning of the bearing arrangement.
Fitting tools
Depending on the application, the following are suitable:
- induction heaters; note the manufacturer’s guidance on grease and seals
- heating cupboard; heating up to +80 °C
- mechanical or hydraulic presses; use fitting sleeves that cover the whole circumference of the bearing ring end faces
- hammer and fitting sleeves; blows should only be applied concentrically to the sleeve.
Fitting forces must never be directed through the rolling elements. Direct blows on the bearing rings must be avoided. Ensure that the seals are not damaged during fitting.
Guidelines for dismantling
Dismantling should be taken into consideration in the original design of the bearing position. If the bearing is to be reused:
- do not apply direct blows to the bearing rings
- do not apply dismantling forces through the rolling elements
- carefully clean the bearings after dismantling
- do not use a concentrated or “hard” flame.
