Selection

Multiply the belt width in inches by the square root of the belt speed in feet per minute. Use:

• Type R if the result is up to 250 and if the belt thickness is 1/2 max and belt width is 16 max. If either is not the case use type K.
• Type K if the result is 250-500 and if the belt thickness is 3/4 max and belt width is 24 max. If either is not the case use type E.
• Type E if the result is 500-800 and if the belt thickness is 1" max and belt width is 42 max. If either is not the case use type I.
• Type I if the result is 800-1200 and if the belt thickness is 1-1/4 max and belt width is 60 max. If either is not the case or if the result exceeds 1200 a proportional reduction is spacing is required.

Spacing

WHEN PROBLEMS AREAS ARE LOCALIZED there is no need to equip the entire belt. Very often if these local/critical areas are equipped, the remainder of the belt will track within acceptable limits. The installation is then limited to the localized area plus a sufficient lead-in and lead-out. If near the head or tail pulley or belt take-up install one of the pairs within 18 inches of same. See spacing requirements below.

FOR MODERATE TRACKING PROBLEMS LOCALIZED OR OVER THE ENTIRE LENGTH (one where the belt's lateral movement can be controlled without deformation with a 3-1/2 inch hand-held piece of material) allow a pair every 32 foot (approx.) on the top side, every 64 foot (approx.) on the return side. Reduce spacing if the belt is especially limber-that is, lacking internal resistance to curl. The end pairs should be within 18 inches of the head and tail pulleys. A pair should be within 18 inches of the belt take-up.

FOR SEVERE TRACKING PROBLEMS LOCALIZED OR OVER THE ENTIRE LENGTH every 16 foot (approx.) on the top side, every 32 foot (approx.) on the return side. Reduce spacing if the belt is especially limber-that is, lacking in resistance to curl. The end pairs should be within 18 inches of the head and tail pulleys. A pair should be within 18 inches of the belt take-up.