GND Series - Key Points
Key Points in Internal Boring
Precautions for Internal Boring Recommended Chipbreakers ML GL GF If the prepared hole diameter is small, use an ML type or GL type low-feed chipbreaker, both of which reduce chip curl diameter, to ensure adequate chip evacuation.
GL
ML
MG
GG
GCMN3004-MG
GCMN3002-ML
GCMN3002-GG
GCMN3002-GL
Part Material: 15CrMo Steel Prepared Hole Diameter: ø1.000” Holder: GNDIR2532-T306 Insert: GCMN300 S - SS Cutting Conditions: v c = 330 SFM, f = .0039 IPR, a p = .118” Wet
Internal Boring
External Turning
Chip shapes differ between internal boring and external turning even under the same cutting conditions.
GG
GG
Part Material: 15CrMo Steel Holder: GNDL R2525M-320, Insert: GCMN3002-GG Cutting Conditions: v c = 330 SFM, f = .0039 IPR, a p = .197” Wet
GCMN3002-GG
Key Points for Necking
RN Recommended Chipbreaker
Precautions for Necking
Distance from Part Material to Necking Depth
Seat Size
Necking Depth APMX (Inch)
Distance from Part Material to Necking Depth APMX2 (Inch)
2.0 3.0 4.0 5.0 6.0
.059 .079 .118 .138 .157
.025 .031 .051 .057 .063
APMX2
· For necking, these conditions are recommended for each seat size when grooving with RN chipbreakers. · To prevent interference with the part material, the work diameter for each GNDN holder should be set to the minimum machining diameter (DMIN) or less.
Chip Shape
Part Material
: 15CrMo Steel
Seat Size
: 3.0
Holder Insert
: GNDN R2020K-320-020
: GCMN3015-RN Cutting Conditions : v c = 330 SFM, f = .0039 IPR Necking Depth = .039” Wet
2 Inches
Key Points in Internal Coolant Supply Holders For Small Lathes
· 12mm and 16mm square Internal Coolant Supply Holders for Small Lathes enable insert exchange from both top and bottom.
Wrench
Cap Screw
Flat Screw
Insert
Insert
Wrench
LH040
Wrench
Holders
LT08-06
Holders
LH025
GNDL R/L1212JX- SSS . S J 1212JX
GNDM R/L1616JX- SSS J GNDL R/L1616JX- SSS J 1616JX J 1616JX J
12mm square holder:
16mm square holder:
14
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