Highlights

TRIDEEP GF Chip Former
A new range of TOGT inserts with GF chip formers has been added to the deep drilling line, in six sizes from 07 up to 12.
The GF chip former is characterized by a unique chip gullet that helps to cut the material to short chips at low to medium feeds.
The inserts can be used on GD-GH gundrills and BTA deep drilling tools for Ø14-28mm diameters.

TOGT….GF Chip Former Features

• Chip former with positive rake results in an easy cut
• Advantageous for gundrill machines with low motor torque that can run only with low feed rates
• Avoids long and curly chips that may jam in the drill gullets and damage the tool
• Helps improve surface quality due to small chips that are easily evacuated
• Available in a wide range of inserts from size 07 up to 12 in Grade IC908
• Effective chip control even at low feeds

TOGT-GF
Deep Drilling Inserts with 3 Chip Splitting Cutting Edges, Positive Rake Chipbreaker and a Wiper





Drilling Process on Machining Centers and Lathe Machines

• 1. Chip former with positive rake results in an easy cut
• 2. Advantageous for gundrill machines with low motor torque that can run only with low feed rates
• 3. Avoids long and curly chips that may jam in the drill gullets and damage the tool
• 4. Helps improve surface quality due to small chips that are easily evacuated
• 5. Available in a wide range of inserts from size 07 up to 12 in Grade IC908

Application Range

Feed f (mm/rev)	0.03-0.05	0.03-0.05	0.1-0.3
Application	OK Cross hole drilling	OK Inclined exit 16 mm or less (for standard drill)	OK Boring

Note 1) When drilling cross holes or exiting the inclined surface, make sure to use suitable guide pad design.
Note 2) A pilot hole is needed prior to a boring operation. ap≥1 mm is recommended for boring operations.




Spare Parts

Diameter Range	Insert	Insert Clamping Screw	Key	Solid Carbide Guide Pad	Guide Pad Clamping Screw	Key
14.00-15.99	TOGT 070304-DT/GF	SR-14-560/S	T-8	GPS-05-18-060	SR34-508	T-7
16.00-18.00	TOGT 080305-DT/GF	SR-14-560/S	T-8	GPS-06-20-075
18.01-20.00	TOGT 090305-DT/GF	SR-14-560/S	T-8	GPS-06-20-085
20.01-20.99	TOGT 100305-DT/GF	SR-34-506	T-8	GPS-06-20-085
21.01-21.99	TOGT 100305-DT/GF			GPS-06-20-100
22.01-25.00	TOGT 110405-DT/GF	SR-14-571/S	T-15	GPS-06-20-100
25.01-28.00	TOGT 120405-DT/GF	SR-14-506	T-15	GPS-06-20-120

Chipbreaker selections
Select the GF or DT chipbreakers depending on the feed rates (mm/rev)
GF : for low feed rates


Recommended feed rate of each chipbreaker for various materials


Chipbreaker appearances of New GF & DT



TEST REPORTS

• Machine: Horizontal boring machine
• Work material: SUS304
• Operation: Drilling
• Coolant: Internal

The GF style chipbreaker has improved chip control and provides stable machining Extended tool life with machining stability

	New GF	New DT
Body	GD-DH 19.23	GD-DH 19.23
Insert	TOGT 090305-GF	TOGT 090305-DT
Guide Pad	GPS-06-20-085 IC908	GPS-06-20-085 IC908
Cutting speed Vc (m/min)	80	80
Feed rate f (mm/rev)	0.04	0.04
Feed rate Vf (mm/min)	53	53
Hole diameter DC (mm)	19.23	19.23
Tool life per corner (meter)	4.5	1.0
Chip shape	Short	Long
Coolant	Oil	Oil

Tool Life (per corner)






The NPA016-2019's pdf file: View (PDF) or Download (ZIP)