Product Catalog. 12th edition DIAMOND BLADES & BITS

Product Catalog 12th edition DIAMOND BLADES & BITS www.nedkut .com diamond blade basics Diamond blades contain industrial-grade diamond embedded ...
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Product Catalog 12th edition

DIAMOND BLADES & BITS

www.nedkut .com

diamond blade basics Diamond blades contain industrial-grade diamond embedded in segments or rims on their cutting edge. As the blade is used, the abrasive qualities of the material being cut (such as concrete) wears down the segment. Diamond crystals either get crushed or let loose as the metal matrix gets worn away, exposing new diamonds to continue the cutting. The abrasive quality of the material being cut is a large factor in choosing the correct blade for a job. Harder, less abrasive materials such as cured concrete require a blade with a softer metal mix to ensure adequate erosion of the segment brings new diamond to the surface at an optimum rate. Soft, abrasive materials such as green concrete and asphalt tend to wear down segments faster. Therefore, segments with a harder, more wear-resistant metal mix in the segment, provide longer blade life and overall better performance. Abrasive materials tend to erode the metal core, or center, of diamond blades causing undercutting. Undercutting tends to be concentrated on part of the core that attaches to the segment. If undercutting is excessive, it can cause segment loss and damage the blade. NED offers 2 types of undercut protection which reduce abrasive slurry accumulation beneath the segments to provide extended blade life. Segments come in different heights. The total segment height is not as important as the diamond depth – the portion of the segment that contains diamonds. The diamond depth combined with diamond concentration and quality determines the overall performance value of the blade. The accompanying chart shows the effect different variables have on a diamond blade cutting speed and blade life.

WHAT TO CONSIDER WHEN CHOOSING A DIAMOND BLADE

Variables

Change Result Cutting Blade Speed Life

Segment Bond Hardness

Harder Slower Longer Softer Faster Shorter

Segment Width

Thinner Faster Shorter Thicker Slower Longer

Material Hardness

Harder Slower Longer Softer Faster Shorter

What is the cutting method? Wet or Dry?

Material Abrasiveness

More Faster Shorter Less Slower Longer

What kind of equipment is being used?

Material Steel Reinforcing

Less Faster Longer More Slower Shorter

Material Aggregate Size

Smaller Faster Shorter Larger Slower Longer

Horsepower

Lower Slower Longer Higher Faster Shorter

Blade Speed RPM

Lower Faster Shorter Higher Slower Longer

Water Volume

Lower Faster Shorter Higher Slower Longer

Cutting Pressure

Lower Slower Shorter Higher Faster Longer

Cutting Depth

Shallow Faster Longer Deep Slower Shorter

What is the material?

Brick? Block? Combination of Brick and Block? Green Concrete? Cured Concrete? Asphalt?

High speed hand held saw? Masonry table type saw? Walk behind saw? (low or high H.P.) Hand held power tool? How deep is the cut?

Use proper blade diameter for depth required. (remember, a 5” cut requires a 14” blade.) How big is the job?

Higher quality blades are more economical to use.

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DIAMOND BLADE CUTTING PERFORMANCE VARIABLES

specifying diamond blade

HARDNESS

CRITICALLY HARD

HARD

8000 PSI (Power Plants)

6000 - 8000 PSI (Bridges & Airport Runways) River Rock, Quartz, Some Granite, Schist

Flint, Chert, AGGREGATE Basalt, Trap Rock, TYPE Quartz AGGREGATE SIZES

+1 1/2” Sieved Gravel Round (Low Abrasion)

SAND

Heavy • #4 rebar (1/2”) • #5 rebar (5/8”) • Multi mat wire mesh

STEEL REINFORCING BLADE OR CORE BIT BOND HARDNESS SELECTION

MEDIUM

SOFT

GREEN (