Welding Vises | McMaster-Carr

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61 Products

Heavy Duty Corner Clamps

With five times the capacity of standard corner clamps, these secure two workpieces at a 90° angle. They have a pivoting clamping surface to hold materials of unequal thicknesses simultaneously. The screw is copper plated to resist weld spatter.

Opening			Clamping Surface		Mounting Slots
Max.	Min.	Holding Cap., lb.	Ht.	Material	No. of	Lg.	Wd.	Mounting Fasteners Included		Each
3 1/4"	0"	1,000	1 3/8"	Iron	2	2"	1/2"	No	5017A11	0000000
4 3/8"	0"	1,250	2 3/8"	Iron	2	2 5/16"	7/16"	No	5017A21	000000

Three-Axis Corner Clamps

Clamp up to three workpieces at 90° angles. Press a button to move the threaded holding screws in or out. The third axis clamping arm swings out of the way for material removal. The screws are copper plated to resist weld spatter.

Opening			Fixed Clamping Surface		Mounting Slots
Max.	Min.	Holding Cap., lb.	Ht.	Material	No. of	Lg.	Wd.	Mounting Fasteners Included		Each
3 3/4"	0"	550	1 3/8"	Iron	2	1 1/2"	7/16"	No	6557A14	0000000

Miniature Adjustable-Angle Magnetic Clamps

Sized for small parts and tight spaces, these clamps have a pivoting pad at each end to hold workpieces at any angle up to 180°.

Sold Individually


Two Individual Clamps Shown

	Overall
Max. Magnetic Pull, lbf	Lg.	Wd.	Ht.	Holding Angle		Each
14	2 1/4"	1"	1"	0° to 180°	2497N12	00000
18	2 1/2"	1 1/2"	1 1/4"	0° to 180°	2497N13	00000

Sold as Sets


Two Individual Clamps Shown

No. of Pieces	Includes	Holding Angle		Each
4	Two 2 1/4" Lg. × 1" Wd. Clamps with 14 lbs. Max. Magnetic Pull Two 2 1/2" Lg. × 1 1/2" Wd. Clamps with 18 lbs. Max. Magnetic Pull	0° to 180°	2497N11	000000

Outside-Clamping Magnetic Clamps

Clamp workpieces from the outside at a 90° angle, leaving the inside free for welding or fabrication. You can also clamp on the inside at 45° and 90°.

	Holding Angle		Overall
Max. Magnetic Pull, lbf	Outside	Inside	Lg.	Wd.	Ht.	Body Material		Each
40	90°	45°, 90°	3 7/8"	11/16"	3 7/8"	Steel	6022N21	000000

Welding Fixture Squares


2 Axes	2 Axes With Leveling Tabs	2 Axes with Joint Access Cutouts and Leveling Tabs

2 Axes with Locator Holes	3 Axes

Position your workpieces at the correct angle prior to welding. These squares have an extra-wide head, so you can clamp them in place.

Joint Access Cutouts—Squares with joint access cutouts make it easier to reach joints, such as when welding and gluing.

Locator Holes—Those with locator holes help you align your workpiece on a welding grid. They have _5/8" locating holes on 2" centers to fit into standard fixture table configurations.

Leveling Tabs—Leveling tabs are for aligning workpieces with one another.

Aluminum—Aluminum squares are lightweight and corrosion resistant.

Cast Iron—Cast iron squares are durable and difficult to dent or scratch. They resist weld spatter, but they’re more likely to corrode than aluminum.

Black-Oxide Steel—Black-oxide steel squares are stronger than aluminum and more corrosion resistant than cast iron.

		Overall				Locator Hole		Aluminum		Cast Iron		Black-Oxide Steel
	Holding Angle	Lg.	Wd.	Ht.	Flange Thk.	Dia.	Ctr-to-Ctr.		Each		Each		Each
2 Axes



		90°	4"	4"	2 1/2"	3/8"	—	—	———	0	———	0	4984N102	000000


		2 Axes with Leveling Tabs



				45°, 90°	4"	4"	1 1/2"	1/4"	—	—	4984N32	000000	4984N42	000000	———	0


				45°, 90°	6"	6"	1 1/2"	1/4"	—	—	4984N33	00000	4984N43	00000	———	0
				45°, 90°	12"	12"	3"	1/4"	—	—	4984N36	000000	4984N46	000000	———	0


				2 Axes with Joint Access Cutouts and Leveling Tabs



						45°, 90°	4"	4"	1 1/2"	1/4"	—	—	4984N12	00000	4984N22	00000	———	0


						45°, 90°	6"	6"	1 1/2"	1/4"	—	—	4984N13	00000	4984N23	00000	———	0
						45°, 90°	12"	12"	3"	3/8"	—	—	4984N16	000000	4984N26	000000	———	0


						2 Axes with Locator Holes



								90°	12"	8"	2 1/2"	3/8"	5/8"	2"	———	0	———	0	4984N103	00000


								90°	12"	12"	2 1/2"	3/8"	5/8"	2"	———	0	———	0	4984N104	00000


								3 Axes



										90°	10 1/2"	10 1/2"	8"	1"	—	—	———	0	4984N101	000000	———	0

Heavy Duty Chain Pipe Welding Clamps


Straight Clamps	Flange Clamps

Adjustable Clamps

The open clamp design permits welding around almost the entire pipe circumference. Secure components with chains and tighten the handles.

Straight Clamps—Straight clamps are for use with two lengths of straight pipe and with reducers.

Flange Clamps—Flange clamps are for flanges and straight pipe.

Adjustable Clamps—Adjustable clamps are for use with straight pipe, elbows, tees, reducers, and risers. They pivot on a hinge to hold components at any angle from 90° to 180°.

Aluminum Body—Aluminum clamps are lighter in weight than iron clamps.

Iron Body—Iron clamps are more durable than aluminum.

	For Pipe		Aluminum Body		Iron Body
	OD	Size		Each		Each
Straight Clamps



		1/2" to 8"	1/4 to 6	5053A1	0000000	5053A2	0000000


		8" to 16"	8 to 16	5053A3	000000	5053A4	000000


		Flange Clamps



				2 1/2" to 8"	2 1/2 to 6	5053A5	000000	———	0


				Adjustable Clamps



						2 1/8" to 8"	2 to 6	5053A7	000000	———	0

Adjustable-Angle Magnetic Clamps

Two clamps connected by a pivoting arm hold workpieces at nearly any angle.

		Overall
Max. Magnetic Pull, lbf	Holding Angle	Lg.	Wd.	Ht.	Body Material		Each
120	15° to 180°	7 5/8"	3/4"	3 3/4"	Steel	2411N11	000000

Easy On/Off Magnetic Clamps


Style A	Style B	Style C

Style D	Style E

Switch the magnets on these clamps on and off for easy placement and removal of your workpiece.

Style E—Style E have magnets on opposite sides that can be turned on and off independently, letting you adjust one workpiece while the other remains clamped in place. They’re commonly used to weld two pieces of metal together.

			Overall
	Max. Magnetic Pull, lbf	Holding Angle	Lg.	Wd.	Ht.	Body Material	Features		Each
Style A



		65	45°, 90°	4 3/8"	1"	3 3/4"	Steel	—	5021A41	000000


		75	45°, 90°	6"	1 1/4"	5 1/8"	Steel	—	5021A43	00000
		90	45°, 90°	4 3/8"	1 1/8"	3 3/4"	Steel	—	5021A42	00000
		160	45°, 90°	6"	1 3/8"	5 1/8"	Steel	—	5021A44	00000


		Style B



				140	30°, 45°, 60°, 90°	6"	1 3/8"	5 1/8"	Steel	—	5021A36	00000


				Style C



						75	45°, 60°, 75°, 90°, 105°, 120°, 135°	2 7/8"	1 1/4"	2 9/16"	Steel	—	5021A32	00000


						Style D



								150	90°	1 5/8"	1 9/16"	2 3/4"	Steel	—	5021A11	00000


								400	90°	2 1/2"	1 5/8"	3 9/16"	Steel	—	5021A31	000000
								600	90°	3"	2"	4 1/8"	Steel	—	5021A33	000000
								1,000	90°	4 1/4"	4"	4 3/4"	Steel	—	5021A13	000000


								Style E



										120	90°	6"	1 1/2"	6"	Aluminum	Two On/Off Switches	5021A34	000000


										260	90°	7 3/4"	1 7/8"	7 3/4"	Aluminum	Two On/Off Switches	5021A35	000000

Easy On/Off Adjustable-Angle Magnetic Clamps

Each arm has a handle for turning the magnets on and off. Adjust these clamps to hold at any angle from 28° to 270° and lock the arms in place at the joint.

		Arm
Max. Magnetic Pull, lbf	Holding Angle	Lg.	Wd.	Ht.	Overall Lg.	Body Material	Features		Each
200	28° to 270°	9 1/4"	1 11/16"	1 1/2"	15 3/4"	Steel	Magnet On/Off Knobs	1395N11	0000000

Magnetic Clamps


Style A	Style B	Style C

Style D	Style E

Hold magnetic workpieces in place.

Style E—Style E clamps have a handle to help pull them off surfaces.

Copper-Plated Steel Body—Copper-plated steel clamps won’t scratch steel surfaces. Their plating also stops weld spatter from sticking to their surface, so sharp spatter won’t cut you or your workpiece.

			Overall
Style	Max. Magnetic Pull, lbf	Holding Angle	Lg.	Wd.	Ht.	Body Material		Each
A	41	45°, 90°	4 3/4"	9/16"	3 1/4"	Steel	5167A101	00000
B	22	30°, 45°, 60°, 75°, 90°	4"	1/2"	2 1/2"	Steel	5167A25	00000
B	55	30°, 45°, 60°, 75°, 90°	4 3/8"	3/4"	3"	Steel	5167A26	00000
B	110	30°, 45°, 60°, 75°, 90°	4 3/8"	1 9/16"	3"	Steel	5167A27	00000
C	60	45°, 90°	3 3/4"	3/4"	3 3/4"	Copper-Plated Steel	5167A311	00000
C	75	45°, 90°	3 3/4"	3/4"	4 3/8"	Copper-Plated Steel	5167A313	00000
C	112	45°, 90°, 135°	3 3/4"	3/4"	4 3/8"	Steel	5021A86	00000
D	60	30°, 45°, 60°, 90°	3 3/4"	3/4"	3 3/4"	Copper-Plated Steel	5167A312	00000
E	150	45°, 90°	3 3/4"	1 1/2"	4 3/8"	Steel	5167A102	00000
E	325	45°, 90°	8"	1 1/2"	8"	Steel	5167A28	000000

Three-Axis Magnetic Clamps


	55 lbf Maximum Magnetic Pull	75 lbf Maximum Magnetic Pull

Hold and align up to three workpieces at 90° angles. Three magnetic faces clamp parts along multiple planes simultaneously, so you can tack-weld corners and T-joints without repositioning or using separate fixtures.

		Overall
Max. Magnetic Pull, lbf	Holding Angle	Lg.	Wd.	Ht.	Body Material		Each
55	30°, 45°, 60°, 75°, 90°	3"	4 3/8"	1 1/8"	Steel	2393N1	000000
75	45°, 90°	4 3/8"	3 3/4"	1 1/8"	Steel	2393N2	00000

Pipe Welding Clamps

External Clamping—Thumb

Screw Adjustment

External Clamping—Self-Centering

Internal

Clamping—Self-Centering

Hold pipe and fittings together for tack welding. These clamps can be used to weld two pipes of similar or different diameters, or they can be used to weld a pipe to a flange. With a rugged build, they’re designed for use with heavy pipe.

External Clamping—External clamps work well when you can’t access the inside of your pipe. However, you may need to rotate them during welding to move them out of the way.

Internal Clamping—Internal clamps don’t obstruct welding, making the process faster and simpler. One side of these two-part clamps expands with a knob while the other expands with a hand bar, so you can set them at different diameters to join pipe and flanges of varying sizes.

Thumb Screw Adjustment—Clamps with thumb screws hold fittings or flanges at three separate points—adjust them manually to center the two pieces being joined.

Self-Centering—Self-centering clamps consist of two clamps that share a center line even as you attach each to a different piece of pipe, so the pipes stay aligned with no manual adjustment needed.

	For Pipe		Steel Body		Stainless Steel Body
	OD	Size		Each		Each
External Clamping—Thumb Screw Adjustment



		2" to 6"	2 to 5	2530N12	0000000	———	0


		External Clamping—Self-Centering



				1/8" to 3"	1/8 to 2 1/2	———	0	2530N22	0000000


				1 1/2" to 5"	1 1/4 to 4	———	0	2530N23	000000


				Internal Clamping—Self-Centering



						2" to 6"	2 to 5	———	0	2530N15	000000


						4" to 8"	3 1/2 to 7	———	0	2530N16	000000
						6" to 14"	6 to 14	———	0	2530N17	00000000