Grinding Guide; Diamonds - Husqvarna PG 400 Operator's Manual

Diamonds

Background
Diamond abrasives usually consist of 2 components:
• Diamond powder (also known as diamond crystals or grit).
By changing the size of the diamond powder or grit, we
can change how coarse or fine the scratches will be that
are left behind from the grinding process.
• A binding agent (metal or resin). Diamond powder is
mixed and suspended in either a metal or resin binding
agent. When suspended in a metal binding agent, the
finished product is referred to as a Metal Bond or Sintered
diamond segment. When suspended in a resin binding
agent, the finished product is referred to as a Resin Bond
diamond segment or pad. By changing the hardness of
the binding agent, we can change how fast or slow the
diamond abrasive will wear.
General Principles
The following are general rules regarding diamond segments
in grinding applications. As with all general rules there are
exceptions or cases when it is not the case.
Diamond grit size
Changing the size of the diamond grit to a smaller particle/grit
size will effect the performance of the diamond tool in the
following ways:
• Create a finer scratch pattern.
• Increase life of diamond tool.
The opposite will occur when changing to a larger particle/grit
size.
Binding agent
Increasing hardness of bond will:
• Create a finer scratch pattern.
• Increase life of diamond tool.
• Decrease production rate.
The opposite will occur when making the metal or resin bond
softer.
Number of diamond segments under the machine
Increasing the number of segments under the machine will:
• Reduce pressure on each individual diamond segment -
reduce wear rate on diamond segments.
• Reduce load on the machine and cause the grinder to
draw less current.
• Create a smoother scratch pattern (particularly on soft
floors).
The opposite will occur when decreasing the number of
segments under the machine.
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English

GRINDING GUIDE

Summary of diamond principles
Diamond segments need to wear in order to achieve
productivity. Diamond segment wear can be influenced by the
following factors:
• Pressure.
• Hardness of bond.
• Diamond grit size.
• Number of segments under the machine.
• Adding an additional abrasive (e.g. sand, silicone carbide)
on the floor will increase wear.
Generally, the faster a diamond segment wears, the faster the
productivity will be. By varying the above factors, changes
can also be made to effect the following:
• Scratch pattern.
• Current draw of machine.
• Flatness of floor (see next section).
• Ease of operation.