GND Series - Precautions
Precautions for Grooving Tool Holders GND
■ Insert Mounting Precautions (1) Remove any dust, etc. from the insert seat, bolt, and bolt hole before attaching the insert. (2) If there are scratches or burrs on the insert seat, scrape them away. (3) Mount the insert by sliding it parallel to the seat. (4) Clamp the insert with the opposite side (holder side) of the cutting edge secured on the constraining surface. (5) T ighten the insert with the recommended tightening torque. If the insert is tightened with excessive torque, it may be damaged, leading to injury. (6) When changing the insert, adjust the cutting edge offset value.
Mount the insert parallel to the seat
Be sure to push the insert to the end
Tighten the insert with the recommended tightening torque (See each holder's stock table) Slide the
insert parallel with the seat.
Restraining face
■ Precautions when Mounting Holders (1) Remove any dust and oil from the toolpost before setting the holder. (2) If there are scratches or burrs on the toolpost, scrape them away. (3) Place the holder so that the insert is perpendicular to the workpiece. Failure to do so may bend the machined surface or cause chattering. (4) The overhang of the holder should be as short as possible. (5) When grooving or traverse cutting, adjust the center height of the cutting edge to as close to ±0mm as possible. (Within ±0.1mm is recommended.) Incorrect center height adjustment may cause chattering. In cut-off applications, adjust the center height of the cutting edge to a value from 0 to +0.2mm. A lower center height will result in a larger nib at the center. (6) Set the oil supply nozzle so that coolant can be supplied from the top of the upper clamp unit.
Center height adjustment in cut-off applications
Supply coolant to the top of the upper clamp unit
Mount the holder perpendicular to the workpiece.
The overhang should be short.
Center Height 0 to +.0079”
Overhang
Part Material
Toolpost
■ RN vs. RG Insert Length Comparison
■ D.O.C. when Pulling Up with RG/RN Chipbreakers
Part Material
Maximum Depth of Cut when Pulling Up (inch / mm )
Seat Size ( mm )
E1
CW
E1
.006 / .15 .004 / .10 .008 / .20 .010 / .25 .012 / .30 .014 / .35 .016 / .40
2.0*
4.0 5.0 6.0 3.0 7.0 8.0
E1
: CW = 2.0 is RN Chipbreakers only
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