(JDRDIATOOL@163.COM)Diamond blade,polishing pad, hole saw,drill bit, grinding wheel, cutting tools

Moh’s Range                       Description                                  Aggregates 8-9                                     Citically Hard                               Flint, chert, trap rock, basalt 6-7                              ...

Compressive Strength Concrete slabs may vary greatly in compressive strength, measured in pounds per square inch (PSI). Most concrete roads are 4,000-6,000 PSI, while typical patios or sidewalks are about 3,000 PSI. Concrete Hardness PSI Critically hard                 8,000 or more Hard                                      5,000 – 8,000 Medium                                 4,000 – 6,000 Soft                                      3,000 or less concrete ...

Size of the Aggregate The size of aggregate affects diamond blade performance. Large aggregates tend to make a diamond blade cut faster. The most common sizes of aggregate are: Pea Gravel………..                                       Variable in size,  or less in diameter ¾”…………………….. usually 3/8”                                                      Sieved size 1-1/2”……………….                         ...

Symptom:Uneven Diamond Segment Wear Cause: a.  Diamond Segments are worn on one side, reducing side, reducing side clearance. It is usually caused by misalignment of the saw or a lack of sufficient water on both sides of the diamond blade .            b .  Diamond Blade is worn out-of-round due to bad bearings, worn arbor or excessive dulling condition. See section on excessive wear. Remedy: a.Check saw alignment. Clean water system, making certain that water is properly applied to the leading edge of the blade flanges. Check to see if pump is supplying sufficient, even water.              b.Replace bearings or worn arbor as required Turbo segmented diamond blade

Factors Involving Concrete When cutting concrete , several factors influence your choice of diamond blades . Compressive strength Steel reinforcing (rebar) Hardness of the aggregate Green or cured concrete Size of the aggregate Abrasivity of the aggregate Type of sand The guidelines in this section are for general reference only. Your best source for information on the characteristics of the concrete you have to cut is from the original contractor. Contact your local Department of Transportation or City Hall for help in finding this information.   To be continued laser welded turbo diamond blade

Symptom:Undercutting Cause:Undercutting is a condition in which the steel center wears faster than the diamond segment, especially in the areas where the diamond 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 this condition, called segment loss. Remedy:The flow of swarf (abrasive cuttings) must be distributed over a wider area, away from the critical segment area with undercut retardant diamond segments or other types of undercut protectors specially positioned around the steel center to change the pattern of constant abrasion. Although successful in most cases, undercut protectors do not provide 100% protection. diamond blade for stone and concrete

Symptom: diamond blade core cracked Cause: a. diamond Blade is too hard for material being cut.             b.Excessive cutting pressure, or jamming or twisting the blade in the cut can cause the blade core to band or flex. When subjected to extreme stress and metal fatigue, the blade’s steel core will eventually crack.             c.Overheating through inadequate water supply or improper use of dry cutting blades. Remedy:a.Use correct diamond blade with softer bond.              b.The saw operator should use steady, even infeed pressure, and be careful not to twist or jam the blade in the cut.              c.Use adequate water to cool wet-cutting diamond blades (for example, 2-5 gallons per minute for concrete saws). Allow adequate airflow around dr...