MasterCraft 054-7544-6, Инструкция по эксплуатации, Страница: 17 / 48

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
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4. If the hammer drill stalls, it is usually because it is being overloaded. Release the variable-speed trigger
switch immediately, reverse the direction of rotation and gently squeeze the variable-speed trigger
switch to remove the bit from the workpiece. Investigate and correct the cause of stalling before
resuming work.
5. Keep the motor running when pulling the bit back out of the completed hole. This will prevent jamming.
For drilling in metal, use high-speed, steel-twist drill bits.
1. Use light oil on the drill bit to keep it from overheating; the oil will prolong the life of the bit and increase
the drilling action.
2. When drilling a large hole, first use a smaller bit to drill a small pilot hole to prevent the larger bit from
slipping.
3. Select the desired speed to match the planned operation.
4. Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Maintain a speed
and pressure that allows cutting without overheating the bit.
5. If the hammer drill stalls, it is usually because it is being overloaded. Release the variable-speed trigger
switch immediately, reverse the direction of rotation and gently squeeze the variable-speed trigger
switch to remove the bit from the workpiece. Investigate and correct the cause of stalling before
resuming work.
6. Keep the motor running when pulling the bit back out of completed hole. This will prevent jamming.
HAMMER-DRILLING MODE OPERATION
1. When hammer drilling, use just enough force on the drill to keep it from bouncing excessively. Too much
force will cause slower drilling speeds, overheating and a lower drilling rate.
2. Do not exert side pressure on the bit when drilling as this will cause clogging of the bit flutes and a
slower drilling speed.
3. If the drill speed starts to drop off when drilling deep holes, pull the bit partially out of the hole with the
tool still running to help clear debris from the hole.
For masonry, use carbide-tipped bits or masonry bits. A smooth, even flow of dust indicates the proper
drilling rate.
SCREWDRIVER OPERATION
1. Select the desired speed/torque range to match the planned operation.
2. Attach the desired fastener accessory into the chuck.
3. Make a few practice runs in a scrap piece before working.
OPERA
TING INSTRUCTIONS