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Helicoidal drills
angles of the edges
Normal cut
Excessive cut
a/ Comprising removing matter from a hole to enlarge it so as to achieve a good surface
condition,
b/ Use a boring tool with a 45° angle to bore a through hole or make a chamfer or use a
boring-dressing tool when boring a non-though hole, bring the tool to the same height
(again using shims) as the part axis or slightly higher,
c/ Start the machine in automatic advance mode, after first setting the rpm and the
advance
Example:
Advance by 0.25 mm per revolution: Gear A=30, B=120, D=60, Lever 3 on position II,
d/ Set the tool at a tangent to the part face by turning wheel 17. Make a mark on the
Vernier callipers, then bring to a tangent inside the hole in the part by turning wheel 14.
PAY ATTENTION to the anti-clockwise direction, make a mark on the Vernier callipers.
e/ Disengage the tool from the part using wheel 17. Take a cutting depth of 1 mm per
pass off the diameter (10 divisions of the Vernier calliper for wheel 14), then regularly
advance using wheel 17 or in automatic mode by actuating lever 2. When the bore is a
through one (to bore a 10 mm depth), then have the wheel 17 Vernier callipers perform
ten turns from the point where you made a mark.
f/ Disengage the tool then take a measuremen
Boring tool angled 45 °
WARNING: Always wear protective goggles and remove the chips using a
hook, never with your hand
114252-Manual-D-EN.indd 12
Normal cut
Insufficient cut
BORING
1000 x V
N =
π x D
© FAR GROUP EUROPE
Rotation speeds & advances
Metal to work
Steel
Steel
Steel
Boring tool - dressing tool
Cast iron
21/03/12 10:48:38
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