
10
OPERATION
2.3. Use Of Cutting Fluid
2.4. 1-1/4" Weldon Shank
The use of cutting fluids is absolutely necessary when drilling with steel
cutters. Always use the correct cutting oil intended for use. Other oils
may provide insufficient lubrication under different temperatures.
When cutting with hard and difficult materials and a deep hole, it may
be advantageous to provide cutting oil under pressure.
For TAP50 it is recommended to use a pressure can instead of a
regular oil tank. The pressure canister has a hose with a quick coupling
and the valve on the pressure canister can be used to regulate the oil
supply.
TAP50 uses the 5 Morse Taper spindle drilling. To be used with metal
cutters, there is a necessity to use a 1.1/4" adapter. For this application
a 1-1/4" Weldon Shank is the most common. This shank has the
dimension of Ø31mm, 75 x 60mm and has 2 surfaces for the locking
screws.
When using large cutters, it is extremely important that the cutter
is properly fastened in the adaptor before drilling begins. Incorrect
attachment can cause damage to the cutter and adaptor. Always make
sure to use the following procedure to fasten the cutter:
• Always disconnect the power supply when you are change cutter or
are doing adjustments to the machine.
• Insert cutter with pilot into the spindle. Make sure that the 2 locking
surfaces are completely in relation to the 2 screws. Press the cutter
shank completely into the adaptor.
• First tighten one single screw
gently so that the screw turns the
cutter into position. Help rotate
the cutter if necessary.
• Tighten the screw, release and
tighten the screw again.
• Tighten the second screw
properly followed by tightening
the first screw again.
Cutting oil (or paste) must always be supplied through the centre of the
cutter so that the oil goes inside out during drilling.
Application of cutting oil outside the cutter will not provide the necessary
lubrication inside the cutter and cause a faster heating of the plug
formed in the cutter. The heat will cause the plug to expand and often
result in a broken cutter.