MSR/M Rollers series - Technical data

Characteristics
Our supplier, in designing these rollers combines the requirements of high quality and hermetic sealing with low cost and where the loading does not require spindles of 20 mm diameter.


Roller shell
Consists of a selectioned steel tube, machined at either end to strict tolerances.


Bearing housings
Formed from strip steel deep pressed and calibrated to ISO M7: This tolerance allowing a perfect match between the bearing and the relevant parts of the sealing.


Unibloc
The roller shell and the two bearing housings are welded together in a way that forms a monolithic structure of exceptional strength.
This method guarantees the maximum precision and the minimum out of balance forces in the rollers.


Spindles
The bright drawn precision spindle of 15 mm diameter provides an ideal fit to the bearing resulting in its perfect rotation.
The standard design utilises closing bushes, pre-machined with spanner flats ch = 17 and 14.


Bearings
MSR series rollers use rigid radial 6202 series precision ball bearings from the very best market sources.

M series rollers use special cup and cone ball bearings manufactured in house to the strictest quality control and test criteria with precision dimensions.


Sealing
The external seal is a cover cap in zinc plated steel complete with a wiper seal.

Internally, the sealing comprises a nylon (PA6) labyrinth seal with optimum resistance to chemicals and to mechanical pressure, filled with grease that protects the bearing from unwelcome ingress of external particles.

A lip seal is positioned on the inside of the bearing that wipes the spindle and creates an ample space for grease. It's design is such as to contain lubrication even in the case of extreme changes in temperature and to protect the bearing from condensation and possible rusting from the inside of the roller tube.


Lubrication
The grease used is a special lithium based grease with high resistance to ageing and humidity.
The quantity introduced into the roller is sufficient to guarantee an optimum lubrication of the bearing for the working life of the roller.


Balancing
The optimum roller balance is obtained thanks to the auto centralising of the bearings housings to the tube (as in series HDS) during the automatic welding process.
This balance allows the MSR rollers to be used at high speeds eliminating dangerous vibrations and the subsequent "hammering" of the bearings.


Final testing
At the end of the automatic assembly line 100% of the rollers are subjected to high speed rotation, that promotes the even distribution of grease in the seals, and verifies the rotation resistance. Any roller failing pre-set criteria is automatically eliminated from the production line.