DNMG-Insert Lathe Tool Inserts

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Titanium Aluminum Nitride (TiAlN) Coated

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72 Products

Lathe Tool Inserts for Multiple Materials

Choose these premium carbide inserts to turn a variety of materials without changing out your tool. They’re made of higher-quality carbide than economy inserts, so they last longer and create a smoother finish. Install them into a matching holder. For the best performance, choose an insert designed for the material of your workpiece.

Inserts with a larger nose angle and tip radius remove more material with each pass, but they cut less precisely than smaller inserts. Select the insert with the largest nose angle and tip radius that will turn your workpiece to the shape you want.

DNMG (Diamond with 55° Nose Angle)—For DDJN, MDJN, and MDPN Holders


		Clear Plastic Case

For Semi-Interrupted Cutting Conditions—Inserts for semi-interrupted cutting conditions are used to machine imperfectly round workpieces, such as shafts with a keyway. They’re the most common type of insert.

For Interrupted Cutting Conditions—Inserts for interrupted cutting conditions are best for workpieces that will come in and out of contact with the insert, such as hex bars.

Individual—Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment.

Package—Inserts sold in packages come factory sealed from the manufacturer for maximum traceability.

Uncoated—Uncoated inserts are sharper than coated inserts, so they leave a better finish on softer metals, such as aluminum. They’re good for general purpose cutting and short production runs.

Titanium Aluminum Nitride (TiAlN) Coated—Inserts with a titanium aluminum nitride (TiAlN) coating dissipate heat well, especially at high speeds. The coating reacts to high temperatures by forming a layer of aluminum oxide. This layer transfers heat to the chips, so the tool stays cool even without lubrication.

Titanium Nitride (TiN) Coated—Titanium nitride (TiN) coated inserts create less friction than uncoated inserts, so they last longer when run at similar speeds.

Negative Rake Angle—Negative-rake inserts are the first choice for most turning applications. With strong cutting edges on two faces, they last longer than comparable positive-rake inserts. When all the edges on one face are worn, flip the insert over.

Positive Rake Angle—Positive-rake inserts stick out in front of the holder to reach tight spaces on the workpiece. However, they only have cutting edges on one side.

For Medium Cutting Operation—Medium inserts remove a moderate amount of material for a semi-smooth surface finish.

For Finishing Cutting Operation—Use finishing inserts at the end of your turning process to remove minimal material for a smooth surface finish.

Chip Breakers—Inserts with chip breakers prevent long chips from forming, so they won’t block the flow of coolant or damage your tool.

												Individual				Package
	Insert Code	Finish	IC Dia.	Thk.	Hole Dia.	Cutting Edge Lg.	Tip Radius	Rake Angle Type	For Cutting Operation	Coating Process	Features	Includes	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
For Use On Aluminum, Brass, Bronze, Cast Iron, Copper, Nickel, Plastic, Stainless Steel, Steel, and Titanium







				For Semi-Interrupted Cutting Conditions

				DNMG-431	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Medium	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3244A701	000000	10	3244A629	0000000


				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Medium	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3244A706	00000	10	3244A65	000000




						For Interrupted Cutting Conditions

						DNMG-431	Uncoated	1/2"	3/16"	0.203"	0.59"	1/64"	Positive	Medium	—	Chip Breakers	Clear Plastic Case	1	3244A698	00000	10	3244A628	000000


						For Use On Brass, Bronze, Copper, Nickel, Plastic, Stainless Steel, Steel, and Titanium







										For Semi-Interrupted Cutting Conditions

										DNMG-431	Titanium Aluminum Nitride (TiAlN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Finishing	PVD (Physical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3867N146	00000	10	3867N425	000000


										DNMG-432	Titanium Aluminum Nitride (TiAlN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Finishing	PVD (Physical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3867N147	00000	10	3867N428	000000

Economy Lathe Tool Inserts

Install these carbide inserts into a matching holder. When a cutting edge becomes dull, rotate the insert in the holder to use a sharp edge. Larger nose angles and larger tip radii provide a stronger cutting edge but result in increased vibration and a rougher finish.

DNMG (Diamond with 55° Nose Angle)—For DDJN, MDJN, and MDPN Holders


		Clear Plastic Case

Individual—Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment.

Package—Inserts sold in packages come factory sealed from the manufacturer for maximum traceability.

Titanium Nitride (TiN) Coated—Coated inserts last longer and can be run at faster speeds than uncoated inserts.

Negative Rake Angle—Negative-rake inserts have a 90° edge and sit at an angle in the holder to provide a strong cutting force for heavy duty applications. They have cutting edges on both sides for twice the life of comparable positive-rake inserts.

												Individual				Package
	Insert Code	Finish	IC Dia.	Thk.	Hole Dia.	Cutting Edge Lg.	Tip Radius	Rake Angle Type	For Cutting Operation	Coating Process	Features	Includes	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
For Use On Aluminum, Brass, and Bronze



		DNMG-431	Uncoated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Medium	—	Chip Breakers	Clear Plastic Case	1	1691N42	00000	10	1691N441	000000


		DNMG-432	Uncoated	1/2"	3/16"	0.203"	0.6"	1/32"	Negative	Medium	—	Chip Breakers	Clear Plastic Case	1	1691N44	0000	10	1691N443	00000


		For Use On Steel and Stainless Steel



				DNMG-431	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Medium	PVD (Physical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	1691N43	00000	10	1691N442	00000


				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.6"	1/32"	Negative	Medium	PVD (Physical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	1691N45	00000	10	1691N444	00000

Lathe Tool Inserts for Stainless Steel

Heat resistant and shaped for turning stainless steel specifically, they’ll last longer than inserts for multiple materials. Install inserts into a matching holder.

Inserts with a larger nose angle and tip radius remove more material with each pass but cut less precisely than smaller inserts. Select the insert with the largest nose angle and tip radius that will turn your workpiece to the desired shape.

DNMG (Diamond with 55° Nose Angle)—For DDJN, MDJN, and MDPN Holders


	Individual Carbide Insert Case

Image of Attribute. Front orientation. Contains Annotated. DNMG Insert.

For Semi-Interrupted Cutting Conditions—Inserts for semi-interrupted cutting conditions are the most commonly used, often to machine imperfectly round workpieces, such as shafts with a keyway.

Individual—Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment.

Package—Inserts sold in packages come factory sealed from the manufacturer for maximum traceability.

For Roughing Cutting Operation—Roughing inserts are used for removing material quickly when surface finish isn’t a concern.

For Medium Cutting Operation—Medium inserts remove a moderate amount of material for a semi-smooth surface finish.

For Finishing Cutting Operation—Use finishing inserts at the end of your turning process to remove minimal material for a smooth surface finish.

												Individual				Package
	Insert Code	Finish	IC Dia.	Thk.	Hole Dia.	Cutting Edge Lg.	Tip Radius	Rake Angle Type	For Cutting Operation	Coating Process	Features	Includes	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
For Use On Stainless Steel







				For Semi-Interrupted Cutting Conditions

				DNMG-431	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Medium	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	4016N137	000000	10	4016N4	0000000


				DNMG-431	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Finishing	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3244A696	00000	10	3244A61	000000
				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Roughing	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	4016N139	00000	10	4016N415	000000
				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Medium	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3244A703	00000	10	3244A63	000000
				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Finishing	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	4016N138	00000	10	4016N411	000000

Lathe Tool Inserts for Steel

Optimized for use on steel, these inserts can run at higher cutting speeds and will last longer than inserts for multiple materials. Install inserts into a matching holder.

DNMG (Diamond with 55° Nose Angle)—For DDJN, MDJN, and MDPN Holders

Clear Plastic Case

For Semi-Interrupted Cutting Conditions—Inserts for semi-interrupted cutting conditions are the most commonly used, often to machine imperfectly round workpieces, such as shafts with a keyway.

Individual—Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment.

Package—Inserts sold in packages come factory sealed from the manufacturer for maximum traceability.

For Roughing Cutting Operation—Roughing inserts are used for removing material quickly when surface finish isn’t a concern.

For Medium Cutting Operation—Medium inserts remove a moderate amount of material for a semi-smooth surface finish.

For Finishing Cutting Operation—Use finishing inserts at the end of your turning process to remove minimal material for a smooth surface finish.

												Individual				Package
	Insert Code	Finish	IC Dia.	Thk.	Hole Dia.	Cutting Edge Lg.	Tip Radius	Rake Angle Type	For Cutting Operation	Coating Process	Features	Includes	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
For Use On Steel







				For Semi-Interrupted Cutting Conditions

				DNMG-431	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Medium	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3244A26	000000	10	3244A39	0000000


				DNMG-431	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.59"	1/64"	Negative	Finishing	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	6110N155	00000	10	6110N502	000000
				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Roughing	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	6110N157	00000	10	6110N535	000000
				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Medium	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	3244A272	00000	10	3244A395	000000
				DNMG-432	Titanium Nitride (TiN) Coated	1/2"	3/16"	0.203"	0.58"	1/32"	Negative	Finishing	CVD (Chemical Vapor Deposition)	Chip Breakers	Clear Plastic Case	1	6110N156	00000	10	6110N518	000000

Turning Lathe Tool Insert Holders

Secure carbide inserts inside these holders for stable turning. They’re also known as indexable insert holders. Select a holder that’s compatible with your insert by matching the insert style and inscribed circle diameter (IC). Right-hand holders move from right to left toward the lathe chuck, left-hand holders move from left to right away from the lathe chuck, and neutral holders can cut in either direction.

MDJN Holders with Offset Shank


	Left-Hand Cutting Direction	Right-Hand Cutting Direction

Holders with an offset shank are good for reaching into tight corners and when working close to the chuck.

	Holders								Replacement Clamps		Replacement Clamp Screws		Replacement Seats		Replacement Lock Pin Screws
	For Insert			Shank
	Designation	IC Dia.	Thk.	Wd.	Ht.	Overall Lg.		Each		Each		Each		Each		Each
Along-the-Length-Turning, Chamfering, External-Profiling Cut







				Right-Hand Cutting Direction

				DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS, DNMX	1/2"	3/16"	3/4"	3/4"	4 1/2"	3288A752	0000000	1475N37	000000	3288A943	00000	3288A989	000000	3288A924	000000


				DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS, DNMX	1/2"	3/16"	1"	1"	6"	3288A754	000000	3288A937	00000	3288A946	0000	3288A989	00000	3288A924	00000




						Left-Hand Cutting Direction

						DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS, DNMX	1/2"	3/16"	3/4"	3/4"	4 1/2"	3288A756	000000	1475N37	00000	3288A943	0000	3288A989	00000	3288A924	00000


						DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS, DNMX	1/2"	3/16"	1"	1"	6"	3288A758	000000	3288A937	00000	3288A946	0000	3288A989	00000	3288A924	00000

MDPN Holders with Straight Shank

	Holders								Replacement Clamps		Replacement Clamp Screws		Replacement Seats		Replacement Lock Pin Screws
	For Insert			Shank
	Designation	IC Dia.	Thk.	Wd.	Ht.	Overall Lg.		Each		Each		Each		Each		Each
Along-the-Length-Turning, Chamfering, External-Profiling Cut







				Neutral Cutting Direction

				DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS, DNMX	1/2"	3/16"	3/4"	3/4"	4 1/2"	3288A121	0000000	3288A981	000000	3288A947	00000	3288A989	000000	3288A924	000000


				DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS, DNMX	1/2"	3/16"	1"	1"	6"	3288A189	000000	3288A981	00000	3288A947	0000	3288A989	00000	3288A924	00000

DDJN Holders with Offset Shank

Image of System. Front orientation. Exploded view. Contains Annotated. Lathe Tool Insert Holders. Turning Lathe Tool Insert Holders, DDJN Insert Holder.


Right-Hand Cutting Direction	Left-Hand Cutting Direction

Holders with an offset shank are good for reaching into tight corners and when working close to the chuck.

	Holders								Replacement Clamps		Replacement Seats		Replacement Seat Screws		Replacement Slotted Pins
	For Insert			Shank
	Designation	IC Dia.	Thk.	Wd.	Ht.	Overall Lg.		Each		Each		Each		Each		Each
External-Profiling Cut







				Right-Hand Cutting Direction

				DNGA, DNGG, DNMA, DNMG, DNMP, DNMU	3/8"	3/16"	3/4"	3/4"	4 1/2"	3288A131	0000000	3288A504	000000	3288A874	000000	3288A89	000000	3288A547	00000


				DNGA, DNGG, DNGM, DNGP, DNMA, DNMG, DNMM, DNMP, DNMS	1/2"	3/16"	1"	1"	6"	3288A256	000000	3288A504	00000	3288A903	00000	3288A407	00000	3288A547	0000
				DNGA, DNGG, DNGP, DNMA, DNMG, DNMM	1/2"	1/4"	1"	1"	6"	3288A872	000000	3288A504	00000	3288A903	00000	3288A407	00000	3288A547	0000




						Left-Hand Cutting Direction

						DNGA, DNGG, DNGP, DNMA, DNMG, DNMM	1/2"	1/4"	1"	1"	6"	3288A871	000000	3288A504	00000	3288A903	00000	3288A407	00000	3288A547	0000

Boring Lathe Tool Insert Holders

Shown with Insert Installed

Pair these holders with a carbide insert (not included) to enlarge existing holes to precise diameters. They’re made to ANSI standards. Face your lathe and use the direction the spindle rotates to choose an insert holder.

DDUN Holders—For DNGA, DNGG, DNMG, DNMM, DNMX Inserts

Right-Hand Cutting Direction—Use right-hand holders when the spindle of your lathe rotates counterclockwise.

Coolant Hole—Holders with a coolant hole deliver coolant through the holder from your lathe onto the workpiece to minimize heat.

	Holders												Replacement Torx Screws		Replacement Torx Keys		Replacement Clamp Screws		Replacement Hex Keys		Replacement DD-42 Seats		Replacement DD-42-16 Seats
					For Insert			Cutting Edge Angle
	Shank Dia.	Min. Hole Dia.	Max. Hole Dp.	Overall Lg.	IC Dia.	Thk.	Material	Side	End	Features		Each		Each		Each		Each		Each		Each		Each
Boring, Internal-Profiling Cut







				Right-Hand Cutting Direction

				1"	1 1/2"	3"	12"	1/2"	3/16"	Steel	-27°	3°	Coolant Hole	1475N133	0000000	9971N132	00000	9971N135	00000	9971N129	00000	9971N134	00000	9971N136	000000	9971N137	000000


				1 1/4"	1 3/4"	3 3/4"	12"	1/2"	3/16"	Steel	-27°	3°	Coolant Hole	1475N134	000000	9971N132	0000	9971N135	0000	9971N129	0000	9971N134	0000	9971N136	00000	9971N137	00000

Replacements for Holders

		Each
Replacement Nozzle	9971N133	000000
Replacement Spring	9971N131	0000