Yoke Style General Considerations
Load Runners yoke-style idler-rollers offer considerable mounting flexibility. They can be installed on a bolt or thru-shaft between yoke brackets (“ears”) which are fabricated as an integral part of the equipment, or in individual yoke brackets which can be bolted into position wherever needed.
It is important that the members which support the mounting bolt or thru-shaft are rigid enough to resist bending (which could cause uneven loading on the rollers) and strong enough to withstand the operational radial and thrust loads.
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Axial clamping of yoke-style rollers (through the bore) is required to prevent the bearing components from separating, causing loss of bearing adjustment and premature failure. The outboard end of the mounting bolt or thru-shaft should be allowed to float in the yoke ear to avoid “pinching” and restricting the idler-roller tread when the roller is clamped.
The shoulder on the flange end of a flanged yoke-style idler-roller serves as the dimensional reference point for accurate positioning of the roller flange with respect to the supported structure.
Orient each roller so that the fl ange is closest to the fixed (small diameter) end of the bolt or thru-shaft. (See Drawing.) When the bolt or thru-shaft is clamped, the reference shoulder will be pulled up tightly against the structure reference surface.
By mounting a string of flanged yoke-style rollers in this manner, all flanges will be properly aligned.
The sharp-radius corner of a V-grooved, yoke-style idler-roller indicates which shoulder should be used as a dimensional reference point for accurate alignment of a V-grooved roller with respect to the supported structure.
Orient each roller so that the sharp-radius corner is closest to the fi xed (small diameter) end of the bolt or thru-shaft. (See Drawing)
When the bolt or thru-shaft is clamped, the reference shoulder will be pulled up tightly against the structure reference surface.
By mounting a string of V-grooved yoke-style rollers in this manner, all V-grooves will be properly aligned.