TRUNNIONS

SUPPORT ROLLERS INFORMATION

Trunnions are stout, steel wheels on which a rotary dryer drum rolls. Each must support anywhere from 10 to 20 tons. Trunnions must be smooth and round to reduce vibration, wear, and friction.

It is important to match the tires to the trunnion wheels in both material composition

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COMMON SYMPTOMS OF TRUNNIONS OF TISSUES

diameter that is too small to provide adequate support
defects in the face
Rough wheel surface
Crowned surface
Tapered surface
Shaft breakage

Proactive maintenance for dryer trunnions includes scheduled resurfacing of the trunnion wheels and drum tires followed by a precision alignment check. This maintenance should be completed every year or two as well as any time a trunnion wheel or bearing is replaced.