DIAMOND BLADESTROUBLESHOOTING
BURNING
| CAUSE | REMEDY |
| Insufficient coolant (water) at the cutting surface of a wet cut core bit or blade. | Increase the flow of water and check for proper direction of the water to the cutting surface. |
| Insufficient cooling (air) | Allow the blade to cool every few feet of cut by running it. |
BLADE WILL NOT CUT
| CAUSE | REMEDY |
| Blade is too hard for material being cut. (Wrong spec.) Bond will not wear away to expose new diamonds. | Choose a softer bond. |
| Material being cut is too hard. | Dress or sharpen the blade with a soft concrete block or old abrasive wheel to expose new diamonds. If continual dressing is needed change to a softer bond. |
| Insufficient power to permit blade to cut properly. | Check and tighten belts and make sure adequate horsepower is available for application. |
SEGMENT LOSS
| CAUSE | REMEDY |
| On stone or masonry blades the material may not have been held firmly which allowed the blade to twist or jam. | Material must be held firmly. |
| Overheating due to an inadequate supply of water.Look for burning or discoloration near missing segments. | Provide adequate supply of water. |
| Undercutting which wears away blade core and weakens the weld between segment and core. | Increase water supply and if material being cut is very abrasive switch to wear-resistant cores. |
| Blade is too hard for material being cut causing excessive dullness and the segment seperates because of impact, fatique or frictional heat. | Use the proper blade specification for material being cut. |
WORN OUT OF ROUND
| CAUSE | REMEDY |
| Worn shaft bearings on saw which allows blade to run eccentric. | Install new bearings. |
| Engine not properly tuned which causes “hunting”. | Tune the engine. |
| Blade arbor hole is damaged. | If blade is in good condition the core may be re-bored. |
| Blade mounting arbor is worn or is the wrong size. | Replace worn arbor busing or arbor shaft. |
| Bond is too hard for material causing machine to “pound” at regular intervals, thereby wearing one half of the blade more than the other. | Choose a softer bond. |
UNDERCUTTING
| CAUSE | REMEDY |
| A condition in which the steel core wears at a faster rate than the diamond segments. It is caused by highly abrasive material grinding against the core. | The blade core should be equipped with undercut protectors or full radius segments. |
ARBOR OUT OF ROUND
| CAUSE | REMEDY |
| Blade collar is not properly tightened allowing it to turn or rotate on shaft. | Tighten collars. |
| Worn or dirty collars which do not allow proper blade clamping. | Clean and replace if necessary. |
MISMOUNTING
| CAUSE | REMEDY |
| Blade collars are not properly tightened or are worn out. | Check tightness and replace collars if necessary. |
SEGMENT CRACKS
| CAUSE | REMEDY |
| Blade is too hard for the material being cut. | Use correct blade with a softer bond. |
LOSS OF TENSION
| CAUSE | REMEDY |
| Blade is used on amisaligned saw. | Check for proper saw alignment. |
| Blade is excessively hard for the material being cut. | Correct bond spec. |
| Material slippage causing blade to twist. | Maintain a firm grip on material while cutting. |
| Undersize or mis-matched blade collars. | Minimum 3-7/8″ – 4-1/2″ on concrete saws, 6″ Minimum on blades over 30″. |
| Blade used at improper RPM. | Check shaft RPM. |
| Improper mounting on arbor shaft allows collars to bend blade when tightened. | Make sure blade is securely on arbor shoulder until outside flange and nut are firmly tightened. |
EXCESSIVE WEAR
| CAUSE | REMEDY |
| Using the wrong blade spec. on highly abrasive materials. | Change to a more abrasive resistant bond. |
| Lack of sufficent coolant to the blade often detected by excessive wear in the center of the segment. | Make sure water supply system is functioning properly. |
| Wearing out-of-round accelerates wear. Usually caused by bad bearings, loose or worn “V” belts. | Replace bad bearings or worn “V” belts. |
CORE CRACKS
| CAUSE | REMEDY |
| Blade is too hard for material being cut. | Change to softer bond. |
| Excessive cutting pressure, or jamming or twisting of the blade. | The saw operator should use a steady even pressure without twisting the blade in the cut. |
| Overheating through inadequate water supply or not allowing a dry blade to intermittently cool down. | Use adequate water on wet cutting blades and allow adequate air flow on dry blades. |
UNEVEN SIDE WEAR
| CAUSE | REMEDY |
| Insufficient water, generally on one side of blade. | Make sure water is being distributed evenly on both sides of blade. |
| Equipment problem which causes blade to wear out of round. | Replace bearings, worn arbor shaft or misaligned spindle. |
| Saw Head is misaligned. | Check saw head alignment for squareness both vertically and horizontially. |