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Industrial
Diamond Products
Lunzer Diamond
Impregnated and Plated Core Drills
Impregnated
Thin-Wall Drills
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Coolant, Lubricant and
Pressure
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The
thin wall series was developed for precision drilling in brittle and/or
abrasive materials. With wall thickness held to a maximum of .050",
these drills can effect minimal chipping, improved finish and higher
feed rates.
The diamond
section, bonded to a seamless steel tube, is manufactured to a standard
tolerance of 0.005". This is for both O.D. drills for holes and I.D.
drills for cores. Tighter tolerances can be held on request.
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Diamond's
worst enemy is heat. A constant flow of coolant, either through the
drill, from the side, or with the workpiece submerged is acceptable,
although best results occur when coolant flows through the drill.
To avoid core hang-up we suggest a lubricant additive such as LUNZER
KRYSTAL KUT. Pressure
is also an important issue. Tapping into the mains where 40/60 psi
is common can be effective in most cases. However pressure is never
constant and it is difficult to introduce additives into the system.
For drilling holes below 0.060" a pressure tank where 80 psi can be
realized is the ideal. |
Plated Core
Drills
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A single
layer of diamond mesh, bonded electrochemically, makes a fast cutting,
inexpensive and precise tool. Available in sizes from 0.030", these
drills can effectively drill a substantial number of holes.
Best
described as second generation mounted points, these drills have a
single layer of diamond mesh applied to a hardened steel shank. The
drill diameters, held to a tolerance of .0005", range from 0.001"
in our micro-mini series, to 0.065" in the standard series. The shanks
are centerless ground and lapped. |
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Drill Mounting Information
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A
proper coolant delivery system is as important as the selection of
the drill. A through-the-core process is most productive. Machines
such as the KNIGHT SL SERIES come with thru-feed built into
the head and special mounts are necessary for each drill.
KNIGHT
also supplies water swivels and mountings that attach to conventional
drill presses. Should you have a special mounting please forward a
sample or drawing with your order. |
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