EasyRun Roller Design
A) Shell
- Manufactured from seamless or lengthwise welded accurate steel tubes of ISO 4200 grade steel
- Wall thickness corresponds to the loading and operating conditions the roller is subjected to and is optimised by FEM calculations and verified by long-term testing
B) Shaft
- Drawn from ISO 1035 - 1, ISO 1035-4, EN 10278 grade round bars
- The ends of shafts are CNC machined
- The shaft is ground to a fit tolerance of ISO h6
C) Bearing housing
- Deep drawn from quality sheet steel
- Sheet thickness corresponds to the loading and operating conditions the roller is subjected to and is optimised by FEM calculations and verified by long-term testing
- Bearing fit tolerance to ISO M7
D) Sealing - the back seal
- Manufactured from special polyamide-based material
- Its shape prevents contaminants entering the bearing from the internal area of the roller
E) Bearing
- Single-row ball bearings are used, with dimensions in compliance with ISO 15
C3 radial bearing clearance provides for optimum roller operation - Bearings are filled with lithium based water repellent grease
- Bearings are filled to 70 % of the bearing’s free space which provides for operation without the need for further lubrication throughout its service life
- Double-row self-aligning spherical-roller bearings are used for extremely harsh conditions
F) Circlip
- Manufactured from hardened spring steel in compliance with DIN 471
- Prevents axial movement of the shaft
G) Labyrinth sealing system
- The system comprises of several sealing elements which prevent contaminants from entering the bearing
- Individual elements of the system are circular in shape with interlaid lips which form a labyrinth
- The shape of the lips is designed to prevent the intrusion of contaminants into the bearing chamber without increasing rotational frictional resistance
- The system has two parts - an inner labyrinth (H) and an outer labyrinth (I) protected by a cover and a shaft ring (K)
- The space between the lips of the labyrinth is filled with grease for catching fine dust particles. The grease is the same as the bearing grease
- The space between the short ring and shaft ring is also filled with lubrication grease and forms a grease prechamber for catching larger contaminants
Elements of the labyrinth sealing system are manufactured from polyamide-based material (inner and outer labyrinth) and polypropylene-based material with a UV stabiliser (cover and shaft ring) - Rollers designed for harsh environments come with a cover (J) made of sheet steel
- For rollers with 6310 and 6312 bearings the inner and outer labyrinths (H, I) are made from silumin-aluminium alloy
- The labyrinth system can be fitted with a friction ring to prevent the intrusion of water