FAQs & Trouble-shooting


Here we provide you with some generic trouble-shooting tips for your diamond blades and bits. For specific advice or help on any diamond tool products not listed here, please call us on 0800 885 961.


Blade worn out of round


Cause:  shafter bearings are worn (masonry & concrete) - Remedy: Install new blade shaft bearings or blade shaft, as required.

Cause:  Engine is not properly tuned on concrete saws, causing surges in blade rotation - Remedy: Tune engine according to manufacturer manual.

Cause: Blade arbor hole is damaged from previous mismounting - Remedy: If steel center thickness is 3mm or less at arbor hole, but diamond segments can still be used, rebraze the segments onto new steel centre.  If steel centre is 3mm or more, rebore arbor hole and bush to original size.


Loss of tension


Cause:  Steel centre has been overheading - Remedy: check water flow, distribution and lines.

Cause: Steel centre has been overheating as a result of blade spinning on arbor - Remedy: Tighten the blade shaft nut. Make certain the drive pin is functioning (on concrete saws).

Cause: Steel centre has been overheating from rubbing the side of material being cut - Remedy: Properly align the saw to prevent square cutting.  Make certain blade RPM is correct so the blade operates at its tensioned speed.

Cause: unequal pressure at blade clamping collars - Remedy: Blade clamping collars should be identical in diameter and the recommended size.

Cause: Improper blade specification; blade is too hard - Remedy: Use a softer bonded blade.


Uneven segment wear


Cause: Insufficient water (usually on one side of the blade) - Remedy: Flush out water system and check flow and distribution to both sides of blade.

Cause: Equipment defects cause the segments to wear unevenly - Remedy: Replace bad bearings, worn arbor shaft or misaligned to spindle. (Concrete saws: engine must run smoothly to prevent harmonic vibration).

Cause: Saw head is misaligned - Remedy: Check saw head alignment for squareness both vertically and horizontally.


Blade wobbles


Cause: Blade is mounted on a defective saw - Remedy: Check for bad bearings, bent shaft, or worn mounting arbor. Check clamping discs to make sure they are clean, flat and of correct diameter.

Cause: Blade runs at improper operating speed - Remedy: Make certain that blade shaft is running at recommended RPM to match tenshioned speed of the saw.  For concrete saws, use a tachometer to check and see that engine is at proper speed.

Cause: Blade collar diameters are not identical.  Blade bands as a result of dropping or twisting - Remedy: Use proper size blade collars.


Cracks in steel centre


Cause: Blade flutters in cut as a result of losing blade tension - Remedy:  Tighten the blade shaft nut.  Make sure blade is running at proper tensioned speed and that drive pin is functioning properly.

Cause: Blade specification is too hard for the material being cut - Remedy: Use a softer bond to eliminate stresses which create cracks.

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