DIAQUIP QHS-400 Benutzerhandbuch - Seite 9

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DIAMOND BLADES

Allowed Types Of Blades

This machine may use diamond blades only.

NOTE: Abrasive wheels may not be used on this machine.

Only use either segmented or continuous rim diamond blades.

If the diamond blades are segmented, the maximum allowable peripheral gap between

segments is 10mm and must be with a negative rake angle.

Only diamond blades of 405mm (16") or less may be used.

Blade thickness must be at least 2.0mm and no greater than 6.35mm

Blade Storage And Transport

Do not store or transport the machine with the blade mounted. Remove the blade and store in

such a way that it is protected from being bent or damaged when the machine is not in use-this

will help prevent damage to the blade.

A damaged blade can cause irregular conditions, this can cause imbalance and result in a

hazard. Always inspect new blades for storage or transport damage.

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DIAMOND BLADES

About Diamond Blades

Diamond blades consist of a steel core with diamond segments added to its periphery.

Diamond blades are available for different hardnesses of masonry materials, stone, concrete,

reinforced concrete, etc.

Some diamond blades are designed to be used wet only, while others are designed to be

allowed to be used dry. Refer to the blade manufacturer's instructions.

Generally speaking, even if the blade is specified as a dry type blade, diamond tools always

work better when wet, and dry cutting should be limited to situations in which water cannot or

should not be used. Water will prevent the blade from overheating, greatly reduce the amount of

harmful dust created by cutting, remove the slurry from the cut, and extend the life of the blade.

Diamond is the hardest substance known, but even diamond is unable to withstand extreme

overheating combined with the cutting forces involved. Dry cutting of very hard materials such

as porcelain or reinforced concrete will lead to rapid tool wear and possible failure.

The diamond impregnated segments in a sintered diamond blade operate on a principle of

controlled erosion. The blade does not cut the material, rather it grinds it away. The bond matrix

holding the diamonds is continually worn away by abrasion with the workpiece, exposing the

harder diamonds to stand proud from the bond matrix. A blade with good diamond exposure is

a sharp blade. Blades made for cutting harder materials will have a softer bond, allowing the

diamonds project more aggressively (but will not last as long).

Blades made for cutting softer, abrasive materials will have a harder bond, allowing them to

resist the abrasiveness of the material and to last longer. The other factor is the grit size of the

diamonds themselves: very hard materials tend to require a finer grit size, while coarser grits

will cut faster.

This erosion process causes heat and particles, which require water to cool and rinse free.

Without adequate water, the blade would overheat and be destroyed.

With too much water and not enough feed pressure, there would not be adequate erosion of the

bond matrix (the diamonds not exposed) and the blade becomes dull (diamond segments polish

smooth). This is called glazing and luckily the blade can be de-glazed (sharpened). If the blade

seems to refuse to cut anymore, you know that it is glazed.

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