EDM Electrodes | McMaster-Carr

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For Electrical Discharge Machining Electrode Diameter

95 Products

Electrical Discharge Machining Electrodes

1 Channel

2 Channels

Create very small holes, including pilot holes to run EDM (electrical discharge machining) wire through. For use in hole-popping EDM machines.

Also known as spark machining, EDM uses electrical current to erode a metal workpiece to a desired shape.

Brass—Brass electrodes can be used at a faster machining rate but wear out quicker than copper electrodes.

Copper—Copper electrodes last longer and are better for use on extremely hard materials, such as carbide, sintered diamond, and invar and kovar nickel alloys.

1 Channel—Electrodes with one channel are best for creating through holes.

2 Channels—Electrodes with two channels are best for creating closed-end holes. The internal channels disintegrate material left at the bottom of a closed-end hole.

	Dia., mm	Dia. Decimal Equiv.	Lg., mm	Dia. Tolerance	For Use On	Pkg. Qty.		Pkg.
Brass



	1	0.5	0.02"	400	-0.0008" to 0.0000"	Nickel, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	20	2686N11	000000


	1	1	0.039"	400	-0.0008" to 0.0000"	Nickel, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	20	2686N13	00000
	2	0.5	0.02"	400	-0.0008" to 0.0000"	Nickel, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	20	2686N12	00000
	2	1	0.039"	400	-0.0008" to 0.0000"	Nickel, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel	20	2686N14	00000


	Copper



			1	0.5	0.02"	400	-0.0008" to 0.0000"	Carbide, Nickel, Steel, Titanium, Tool Steel, Hardened Steel, Sintered Diamond	20	2686N15	00000


			1	1	0.039"	400	-0.0008" to 0.0000"	Carbide, Nickel, Steel, Titanium, Tool Steel, Hardened Steel, Sintered Diamond	20	2686N17	00000
			2	0.5	0.02"	300	-0.0008" to 0.0000"	Carbide, Nickel, Steel, Titanium, Tool Steel, Hardened Steel, Sintered Diamond	20	2686N16	00000
			2	1	0.039"	400	-0.0008" to 0.0000"	Carbide, Nickel, Steel, Titanium, Tool Steel, Hardened Steel, Sintered Diamond	20	2686N18	00000

Electrical Discharge Machining Wire

Use in wire-cutting EDM machines.

Also known as spark machining, electrical discharge machining (EDM) uses electrical current to erode a metal workpiece to a desired shape.

Galvanized—Galvanized wire cuts faster than uncoated wire.

Hard—Hard wire works better than soft wire in EDM machines with automatic wire threading.

Soft—Soft wire stays straight as it comes off the spool, making it better than hard wire for EDM machines that do not have automatic wire threading.

					Spool
	Wire Hardness Rating	Dia., mm	Dia. Decimal Equiv.	Lg., m	OD	ID	Elongation	Tensile Strength, psi	Conductivity Percentage, IACS	For Use On	Wt., lb.		Each
Galvanized Brass



		Hard	0.15	0.006"	26,800	5.118"	3.149"	1%	130,000	21%	Carbide, Hardened Steel, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	8.8	2693N12	0000000


		Hard	0.25	0.01"	9,600	5.118"	3.149"	1%	130,000	21%	Carbide, Hardened Steel, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	8.8	2693N13	000000
		Soft	0.25	0.01"	9,600	5.118"	3.149"	15%	72,500	21%	Carbide, Hardened Steel, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	8.8	2693N11	000000


		Uncoated Brass



				Hard	0.25	0.01"	9,600	5.118"	3.149"	1%	130,000	20%	Carbide, Hardened Steel, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	8.8	2693N15	000000


				Soft	0.25	0.01"	9,600	5.118"	3.149"	15%	72,500	20%	Carbide, Hardened Steel, Nickel, Stainless Steel, Steel, Titanium, Tool Steel	8.8	2693N14	000000

Electrical Discharge Machining Electrode Guides

Hold a tube electrode in place as it penetrates the workpiece.

Also known as spark machining, electrical discharge machining (EDM) uses electrical current to erode a metal workpiece to a desired shape.

For Electrical Discharge Machining Electrode Dia., mm	For Electrical Discharge Machining Electrode Dia. Decimal Equiv.	Lg., mm	Wd., mm	Material		Each
0.5	0.02"	30	8	Ceramic	2702N11	0000000
1	0.039"	30	8	Ceramic	2702N12	000000

Conductive Graphite Rods

A low surface resistivity makes this graphite a good electrical conductor. Since this graphite won't adhere to metal, it can be used to fabricate furnace parts, crucibles, and ingot molds.

									6" Long		12" Long
Dia.	Dia. Tolerance	Max. Temp. in a Vacuum, ° F	Surface Resistivity, ohm/sq.	Grain Size	Color	Max. Temp., ° F	Tensile Strength, psi	Performance		Each		Each
1/16"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K99	000000	9121K83	000000
3/32"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K113	0000	9121K87	00000
1/8"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K111	0000	9121K86	00000
1/4"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K71	0000	9121K85	00000
5/16"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K116	0000	9121K89	00000
3/8"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K115	00000	9121K88	00000
7/16"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K118	00000	9121K92	00000
1/2"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K72	00000	9121K84	00000
9/16"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K119	00000	9121K93	00000
5/8"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K117	00000	9121K91	00000
3/4"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K114	00000	9121K73	00000
1"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K98	00000	9121K74	00000
1 1/4"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K96	00000	9121K81	000000
1 1/2"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K95	00000	9121K75	000000
1 3/4"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K97	00000	9121K82	000000
2"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K112	00000	9121K76	000000
2 1/2"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	———	0	9121K94	000000
3"	0.00" to 0.02"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	———	0	9121K77	000000

Conductive Graphite Sheets and Bars

A low surface resistivity makes this graphite a good electrical conductor. Since this graphite won't adhere to metal, it can be used to fabricate furnace parts, crucibles, and ingot molds.

Sheets

									4" × 6"		6" × 6"		12" × 12"
Thk.	Thk. Tolerance	Max. Temp. in a Vacuum, ° F	Surface Resistivity, ohm/sq.	Grain Size	Color	Max. Temp., ° F	Tensile Strength, psi	Performance		Each		Each		Each
1/4"	-0.005" to 0.005"	5,000	2.2 × 10^-3	0.0004"	Black	800	5,500	Conductive	9121K61	000000	9121K64	000000	9121K67	0000000
1/2"	-0.005" to 0.005"	5,000	1.1 × 10^-3	0.0004"	Black	800	5,500	Conductive	9121K62	00000	9121K65	000000	9121K68	000000
1"	-0.005" to 0.005"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	9121K63	000000	9121K66	000000	9121K69	000000

Bars

										3" Long		6" Long		12" Long
Thk.	Thk. Tolerance	Wd.	Max. Temp. in a Vacuum, ° F	Surface Resistivity, ohm/sq.	Grain Size	Color	Max. Temp., ° F	Tensile Strength, psi	Performance		Each		Each		Each
1/4"	-0.005" to 0.005"	1/4"	5,000	2.2 × 10^-3	0.0004"	Black	800	5,500	Conductive	1763T11	000000	1763T21	000000	1763T31	000000
1/4"	-0.005" to 0.005"	1/2"	5,000	2.2 × 10^-3	0.0004"	Black	800	5,500	Conductive	1763T12	00000	1763T22	00000	1763T32	00000
1/4"	-0.005" to 0.005"	1"	5,000	2.2 × 10^-3	0.0004"	Black	800	5,500	Conductive	1763T13	00000	1763T23	00000	1763T33	00000
1/2"	-0.005" to 0.005"	1/2"	5,000	1.1 × 10^-3	0.0004"	Black	800	5,500	Conductive	1763T14	00000	1763T24	00000	1763T34	00000
1/2"	-0.005" to 0.005"	1"	5,000	1.1 × 10^-3	0.0004"	Black	800	5,500	Conductive	1763T15	00000	1763T25	00000	1763T35	00000
1"	-0.005" to 0.005"	1"	5,000	5.5 × 10^-4	0.0004"	Black	800	5,500	Conductive	1763T16	00000	1763T26	00000	1763T36	00000

Ultra-Fine-Grain Conductive Graphite Sheets

This graphite is denser and slightly stronger than standard conductive graphite because it has a smaller grain. A low surface resistivity makes this graphite a good electrical conductor. Since this graphite won't adhere to metal, it can be used to fabricate furnace parts, crucibles, and ingot molds.

									4" × 6"		6" × 6"
Thk.	Thk. Tolerance	Max. Temp. in a Vacuum, ° F	Surface Resistivity, ohm/sq.	Grain Size	Color	Max. Temp., ° F	Tensile Strength, psi	Performance		Each		Each
1/4"	-0.005" to 0.005"	5,000	2.36 × 10^-2	0"	Black	800	6,670	Conductive	9015K81	0000000	9015K83	0000000
1/2"	-0.005" to 0.005"	5,000	1.18 × 10^-2	0"	Black	800	6,670	Conductive	9015K82	000000	9015K84	000000

Compressible Graphite Sheets

For use as seals and gaskets in high-temperature environments, this graphite can compress up to 35% of its thickness for a tight seal.

								12" × 12"		24" × 12"		36" × 36"
Thk.	Thk. Tolerance	Max. Temp. in a Vacuum, ° F	Color	Temp. Range, ° F	Tensile Strength, psi	Performance	Surface Resistivity, ohm/sq.		Each		Each		Each
1/16"	-0.010" to 0.010"	4,500	Gray	-400 to 950	700	Compressible, Conductive	1× 10^2	1276N12	000000	1276N13	000000	1276N14	0000000
1/8"	-0.010" to 0.010"	4,500	Gray	-400 to 950	700	Compressible, Conductive	1× 10^2	1276N16	00000	1276N17	00000	1276N18	000000

Reinforced Compressible Graphite Sheets

A stainless steel insert makes this material stronger than standard compressible graphite. For use as seals and gaskets in high-temperature environments, this graphite can compress up to 35% of its thickness for a tight seal.

									12" × 12"		24" × 12"		36" × 36"
Thk.	Thk. Tolerance	Max. Temp. in a Vacuum, ° F	Insert Thk.	Color	Temp. Range, ° F	Tensile Strength, psi	Performance	Surface Resistivity, ohm/sq.		Each		Each		Each
1/32"	-0.010" to 0.010"	4,500	0.008"	Gray	-400 to 950	5,000	Compressible, Conductive	1× 10^2	1276N21	000000	1276N22	000000	1276N23	0000000
1/16"	-0.010" to 0.010"	4,500	0.008"	Gray	-400 to 950	5,000	Compressible, Conductive	1× 10^2	1276N25	00000	1276N26	000000	1276N27	000000
1/8"	-0.010" to 0.010"	4,500	0.008"	Gray	-400 to 950	5,000	Compressible, Conductive	1× 10^2	1276N29	00000	1276N31	000000	1276N32	000000