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HOW TO USE SUPER LONG DRILLS y 2. Initial cutting with the long type drill
a Drilling a blind hole
y 1. Drilling a pilot hole
z Use a drill with a larger (flatter) point angle than the super long type. zPenetrate the pilot hole at low revolution. (Cutting speed
Mitsubishi type MPS is recommended. 20 30m/min, feed rate 0.20.3mm/rev)
x Ensure a high precision hole is drilled for the guide. xStop the long type drill 1 3mm short of the pilot hole bottom.
c Drill depth : Approx 1D or deeper.
y 4. Drill retraction
(Adjust the pilot hole depth according to the length of the super long
type.)
y 3. Drill the deep hole
zStart cutting at the recommended speed and feed with a non-peck zAfter drilling, lower the cutting revolution about 12mm short of the hole
(continuous feed) cycle. end. (Cutting speed of around 2030m/min)
a Drilling and breaking through on irregular faces or angles xRetract the drill to the pilot hole depth starting point at a feed rate of
3000mm/min.
y 1. Spot facing
cFinally, clear the hole at a cutting speed of 20 30m/min and feed rate
of 0.2 0.3mm/rev.
y 2. Drilling a pilot hole
zMachine a flat or the irregular face by using an end mill or slot drill z Use a drill with a larger (flatter) point angle than the super long type. DRILLING MPS DRILLS
capable of spot facing. Make the spot face diameter the same size as Mitsubishi type MPS is recommended.
the required deep hole diameter.
x Ensure a high precision hole is drilled for the guide.
c Drill depth : Approx 1D or deeper.
(Adjust the pilot hole depth according to the length of the super long
type.)
y 3. Initial cutting with the long type drill y 4. Drill the deep hole
HOW TO
USE
zPenetrate the pilot hole at a low revolution. (Cutting speed zStart cutting at the recommended speed and feed with a non-peck
20 30m/min, feed rate 0.2 0.3mm/rev) (continuous feed) cycle.
xStop the long type drill 1 3mm short of the pilot hole bottom. y 6. Drill retraction
y 5. Breaking through
zWhen breaking through, the cutting edge can be damaged. zRetract the drill to the pilot hole depth starting point at a feed rate of
xA feed rate of 0.05 0.1mm/rev is recommended. 3000mm/min.
xFinally clear the hole at a cutting speed of 2030m/min and feed rate of
0.2 0.3mm/rev.
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