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Table of Contents

Arbor Hole Out Of Round
Blade Wont Cut
Cracked Core
Cracked Segments
Eccentricity
Excessive Wear
Loss Of Tension
Overheated Blade
Segment Loss
Undercutting
Uneven Segment Wear

Segment Loss

CAUSE	REMEDY
Blade is too hard for the material it is cutting, causing excessive dullness, which causes the segment to pound off or fatigue.	Use a softer blade specification.
Worn blade flanges fail to provide proper support, causing the blade to deflect.	Replace both blade flanges
Out of round blade rotation results in pounding, caused by a worn arbor or bad bearings in the shaft.	Replace worn arbor and/or bearings.
Overheating. Usually an easily detected bluish color on the steel center, generally confined to the area where the segment was lost.	Check the water system for blocked water passages. Test the pump to see if it is functioning. For dry cutting it may be necessary to make shallower cuts and allow the blade to run free every few minutes to let the air cool it.
Segment is subjected to sudden, sharp jolting while moving the machine or when contacting the material being cut.	Avoid jarring the blade when transporting the machine. Contact the material with slow, even movements.
“Undercutting”	See “Undercutting” Section.

Repair note: It is possible to replace two or three missing diamond segments, providing the steel center is not cracked or undercut badly. If many segments are missing, or if there is less than 50% blade life remaining, repairing the diamond blade may not be economical. Be certain to eliminate mechanical or operational problems before installing replacement blades.

Undercutting

CAUSE	REMEDY
Undercutting is a condition in which the steel core wears faster than the diamond segment, especially in the areas where the segment and core are joined. The condition is caused by highly abrasive material grinding against the blade during the sawing operation. Usually materials containing sand are responsible for causing this condition. (See section on Segment Loss).	The flow of slurry (abrasive cuttings) must be distributed over a wider area, away from the critical segment area. On most occasions this can be accomplished by using undercut protectors specially positioned around the steel core to change the pattern of abrasion. Although successful in most cases, undercut protectors do not provide 100% protection. Use high water flow to thin the slurry and flush away sand particles.
With a floor saw, sawing all the way through the material, allowing the blade to pickup sub-base material.	Set the cutting depth slightly less than or equal to the total thickness of the slab.