Spot-Welding Supplies | McMaster-Carr

	Welding Process Welding Process

Spot

Stud

	Length Length

	Diameter Diameter

31/64"

5/8"

	Material Material

Copper

Steel

Stainless Steel

	Thread Size Thread Size

	Tip Shape Tip Shape

Pointed

Flat

	RWMA Shank Taper Number RWMA Shank Taper Number

	For Joining For Joining

Stainless Steel

Steel

	Tip Diameter Tip Diameter

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Component Component

Threaded Stud

	For Collet Thread Size For Collet Thread Size

	For Electrode Type For Electrode Type

Dome Nose

RWMA Shank Taper No. 4

RWMA Shank Taper No. 5

	Head Diameter Head Diameter

	Input Voltage Input Voltage

220V AC

240V AC

	For Collet Gauge Number For Collet Gauge Number

	For Blade Material For Blade Material

Bi-Metal

Carbon Steel

	Duty Cycle Duty Cycle

3 Seconds On

5 Seconds On, 5 Seconds Off

57 Seconds Off

	Gauge Gauge

10 ga.

12 ga.

	Overall Width Overall Width

3 1/2"

	Overall Height Overall Height

12"

	Overall Depth Overall Depth

10"

14 1/2"

	Output Power Output Power

2.5 kVA

3.5 kVA

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44 Products

Spot Welding Electrodes with Pointed Tip

The pointed tip is best for tight areas or for a small weld. The shank is tapered for easy press-fit installation.

				Tip
RWMA Shank Taper Number	Dia.	Lg.	For Joining	Shape	Dia.	Material	Specifications Met		Each
4	31/64"	3"	Steel, Stainless Steel	Pointed	3/16"	182 Copper	RWMA Standards	0000000	00000
5	5/8"	3"	Steel, Stainless Steel	Pointed	1/4"	182 Copper	RWMA Standards	0000000	0000

Spot Welding Electrodes with Flat Tip

The flat tip creates a larger weld and can be used when appearance is less important. The shank is tapered for easy press-fit installation.

				Tip
RWMA Shank Taper Number	Dia.	Lg.	For Joining	Shape	Dia.	Material	Specifications Met		Each
4	31/64"	3"	Steel, Stainless Steel	Flat	31/64"	182 Copper	RWMA Standards	0000000	00000
5	5/8"	3"	Steel, Stainless Steel	Flat	5/8"	182 Copper	RWMA Standards	0000000	0000

Cap-Style Spot Welding Electrodes with Pointed Tip

The pointed tip is best for tight areas or for a small weld. The shank is tapered for easy press-fit installation.

				Tip
RWMA Shank Taper Number	Dia.	Lg.	For Joining	Shape	Dia.	Material	Specifications Met		Each
4	31/64"	1 1/8"	Steel, Stainless Steel	Pointed	3/16"	182 Copper	RWMA Standards	0000000	00000
5	5/8"	1 1/4"	Steel, Stainless Steel	Pointed	1/4"	182 Copper	RWMA Standards	0000000	0000

Cap-Style Spot Welding Electrodes with Flat Tip

The flat tip creates a larger weld and can be used when appearance is less important. The shank is tapered for easy press-fit installation.

				Tip
RWMA Shank Taper Number	Dia.	Lg.	For Joining	Shape	Dia.	Material	Specifications Met		Each
4	31/64"	1 1/8"	Steel, Stainless Steel	Flat	31/64"	182 Copper	RWMA Standards	0000000	00000
5	5/8"	1 1/4"	Steel, Stainless Steel	Flat	5/8"	182 Copper	RWMA Standards	0000000	0000

Spot Welding Electrode Cleaners

Use this ratchet-style tool to clean, dress, and shape electrodes without disassembly.

For Electrode Type	Lg.	Wd.	Head Wd.		Each
RWMA Shank Taper No. 4, RWMA Shank Taper No. 5, Dome Nose	8"	3/4"	1 1/4"	0000000	000000

Replacement Cutter

0000000

Each

000000

Spot Welders

Use these welders on mild and galvanized steel as well as stainless steel. The tongs have pointed welding tips that hold and weld the metal pieces together. Do not use on aluminum, copper, or copper alloys.

Maximum material thickness is based on the total thickness of multiple sheets of uncoated mild steel when using 4 15/16" tongs. Capacities are slightly reduced when welding galvanized steel and stainless steel and when using 9 13/16", 13 3/4", or 19 5/8" tongs.

Welders

			Input					Tong		Overall
For Max. Material Thick.	Cooling Method	Duty Cycle	Voltage	Frequency, Hz	Phase	Output Power, kVA	Tip Shape	Throat Ht.	Throat Dp.	Ht.	Wd.	Dp.	Wt., lbs.	Cord Lg., ft.	Plug Type		Each
3/16"	Air	5 Seconds On, 5 Seconds Off	220V AC	60	Single	2.5	Pointed	3 3/4"	4 15/16"	9"	3 1/2"	14 1/2"	25	12	Three Prong	0000000	000000000

Replacement Tongs

Throat
Ht.	Dp.	For Max. Material Thick.	Tip Shape		Pair
3 3/4"	4 15/16"	3/16"	Pointed	0000000	0000000

Optional Tongs

Throat
Ht.	Dp.	For Max. Material Thick.	Tip Shape		Pair
3 3/4"	9 13/16"	1/8"	Pointed	0000000	0000000
3 3/4"	13 3/4"	1/8"	Pointed	0000000	000000
3 3/4"	19 5/8"	3/32"	Pointed	0000000	000000

Replacement Tips

Tip Shape		Pair
Pointed	0000000	000000

Stud Welding Systems

Join threaded studs and pins to steel and stainless steel with resistance welding that won't damage the opposite side of the material.

Threaded studs are for thin-gauge base materials. 18-8 stainless steel studs are more corrosion resistant than copper-coated steel studs.

Pins are for installing insulation and acoustical lining.

Threaded Studs

				Copper-Coated Steel		18-8 Stainless Steel
Thread Size	For Collet Thread Size	Head Dia.	Lg.		Pkg. of 100		Pkg. of 100
1/4"-20	1/4"-20	5/16"	1/2"	0000000	00000	0000000	000000
1/4"-20	1/4"-20	5/16"	3/4"	000000	00	0000000	00000
1/4"-20	1/4"-20	5/16"	1"	0000000	0000	0000000	00000
10-24	10-24	1/4"	1/2"	0000000	0000	0000000	00000
10-24	10-24	1/4"	1"	0000000	0000	0000000	00000
4-40	4-40	3/16"	1/2"	0000000	00000	000000	00
6-32	6-32	7/32"	1/2"	0000000	0000	0000000	0000
6-32	6-32	7/32"	3/4"	0000000	0000	0000000	00000
6-32	6-32	7/32"	1 1/2"	0000000	00000	0000000	00000
8-32	8-32	1/4"	1/2"	0000000	0000	0000000	0000
8-32	8-32	1/4"	3/4"	0000000	0000	0000000	00000

Pins

Gauge	For Collet Gauge Number	For Collet Thread Size	Lg.	Material		Pkg. of 100
10	10	6-32	2 1/2"	Copper-Coated Steel	00000000	000000
10	10	6-32	3"	Copper-Coated Steel	0000000	00000
10	10	6-32	6"	Copper-Coated Steel	0000000	00000
12	12	__	1"	Copper-Coated Steel	00000000	00000
12	12	__	2"	Copper-Coated Steel	00000000	00000
12	12	__	2 1/2"	Copper-Coated Steel	0000000	00000
12	12	__	6"	Copper-Coated Steel	00000000	00000

Band Saw Blade Welders

Make your own band saw blades from coil stock or repair broken blades with these welders. They have a cut-off tool to trim blades at a 90° angle before welding to ensure a tight weld and a file to smooth completed welds.

	For Blade				Input				Overall
Welding Process	Material	Wd.	Thick.	Duty Cycle	Voltage	Frequency	Phase	Output Power	Ht.	Wd.	Dp.	Weight, lbs.	Plug Type	Cord Lg., ft.		Each
Spot	Carbon Steel, Bi-Metal	1/16"-1"	0.025"-0.035"	3 Seconds On, 57 Seconds Off	240V AC	60 Hz	Single	3.5 kVA	12"	8"	10"	78	Three Prong	3 1/2	000000	000000000