Welding tables, fixture tables, carts, magnets and clamps (workholding and fit-up for home fabrication)

welding fixture table · October 18, 2026

What each piece of workholding does in a home weld shop

Workholding covers everything that keeps parts in position while you tack and weld them. In a home or garage shop that comes down to four product classes, and each solves a different problem.

Welding or fixture table: a flat, heavy steel top, often with a grid of holes, that gives you a reference surface and a place to clamp.
Welding cart: a wheeled stand for the machine, a cylinder rack, and a small work surface. It moves your equipment, not your fit-up.
Welding magnets: angle, square, and switchable holders that hold two pieces at a set angle for tack welding.
Clamps: C-clamps, locking pliers, toggle clamps, and hole-pattern clamps that pull parts tight against a stop or the table.

Most beginners buy a cart first because the machine and gas bottle need a place to live. The part that decides weld quality is fit-up, though: gap, alignment, and squareness before the arc starts. A flat surface plus a few good clamps does more for a project than a better power source.

Fixture tables vs carts: flat reference or mobile utility

A fixture table is built to be a reference. The top is thick plate, and the better ones are machined or ground flat enough that a square sits true across it. Legs are bolted or folding, and the table is meant to take clamps, stops, and pins in its holes. A cart is built to be rolled around. Its top is usually thinner sheet or light plate, the frame is tube, and the real value is the cylinder rack, the chain or strap that secures the bottle, and the casters.

The practical split looks like this:

Welding frames, brackets, gates, or anything that must come out square needs a table with a thick, flat top.
Running one machine between a garage and a driveway, with a shielding gas cylinder to carry, needs a cart.
A small shop usually ends up with a cart under the machine and a table or a bench-top fixture plate for the actual building.

A cart top is not a hammering or flattening surface. Tacking on it is fine for small parts, but a thin top can warp from repeated heat and will not stay flat enough to square a frame against. If you buy only one item and fabricate often, a table with locking casters, or a fixture plate on a sturdy bench, serves better than a large cart.

Table specs that decide the purchase: top, holes, load, and legs

Top thickness and flatness. A thicker top resists distortion from weld heat and holds clamp pressure without flexing. Thin tops can cup after repeated welding near one area. Ask whether the listing states flatness or just says “flat”. Unstated usually means the top is cut plate that may have mill scale, laser-cut dross, and small rolling variation.

Hole pattern and size. Fixture tables commonly use a regular grid of holes, and two sizes dominate: 5/8 inch and 16 mm. The nominal difference is only about a tenth of a millimetre, so many pins and bolts will go in either one, but a snug accessory can bind in a hole that is coated, scaled, or full of spatter. Choose the system you want to buy accessories for (stops, pins, hole-pattern clamps, squares) and confirm the accessory’s stated hole size matches. Mixing imperial and metric accessory brands on one table is a common source of frustration.

Surface finish. Bare steel rusts in a humid garage. Nitrided or similarly treated tops resist corrosion and spatter better. Bare tops need a thin coat of oil and a wipe-down after use.

Load rating and legs. A stated load rating is normally a static figure, not a figure for dropping heavy stock or hammering. Folding legs save floor space but add joints that can rack if the table is shoved. Locking casters help in a tight garage, but check that the table does not walk when you clamp hard on one edge.

Welding carts: cylinder rack, casters, and what you will actually use

The cylinder rack is the feature to inspect first. It should hold your bottle upright, with a chain or strap at the upper third and a base that stops the cylinder sliding sideways. Check that the base opening fits the cylinder diameter you use, since a smaller tank sits loose in a wide cradle. Shielding gas for MIG or TIG is the common load. A flux core machine needs no bottle, so a smaller cart or a bench is often enough.

Then look at the stand itself:

Shelf height and depth: the machine’s footprint and weight need to sit fully on the shelf with room to reach the front panel and wire spool.
Casters: larger wheels roll over cracks and garage thresholds better than small casters. Locking brakes matter because a cart that drifts while you pull the gun is annoying and unsafe.
Hooks and holders: cable hooks, a torch holder, and a spot for the ground clamp keep leads from tangling and from lying across the floor.
Tip stability: a tall machine on a narrow cart with a full cylinder is top-heavy. Keep the bottle chained and roll slowly.

More money tends to buy thicker tubing, better welds on the frame, bigger wheels, and a more robust bottle holder. It rarely changes how the machine runs. Match the cart to your machine’s weight and to how far you move it.

Welding magnets and clamps compared

Magnets are fast, but they hold only steel and they are not clamps. Clamps are slower to place but control pressure and can pull a warped part into line. Most fit-up uses both.

Tool	Best for	Main limit
Fixed-angle magnets (45°, 90°, 135°)	Tacking corners, mitres, and T-joints	Fixed angles only. Pull drops on thin, painted, or rusty steel
Switchable magnets	Holding flat stock and picking up parts	Heat and spatter can foul the face
C-clamps	Heavy, reliable pressure on thick stock	Slow to adjust. Threads clog with spatter
Locking pliers	Quick holding of sheet and tube	Pressure varies with jaw setting. Can slip under heat
Toggle clamps	Repeatable fixtures on a table	Need a mounting point or a fixed stop
Hole-pattern clamps	Securing parts directly to a fixture table	Must match the table’s hole size

A stated pull rating, usually quoted in pounds, is measured on clean, thick mild steel under ideal contact. Treat it as a ceiling. On thin sheet, curved stock, or mill-scaled plate, real holding force falls, so buy a margin above what you think you need. Standard magnet materials also lose strength when they get hot, so do not leave a magnet in the weld zone, and never weld across the magnet’s own face. For a beginner kit, a few mixed-angle magnets, four to six C-clamps, a couple of locking pliers, and one combination square cover most projects.

Grounding, arc blow, and heat: where workholding goes wrong

Your work lead needs a clean, low-resistance path back to the machine. A magnetic ground clamp is convenient on a table or cart, but contact is the limiting factor. Paint, rust, oil, and scale all raise resistance and give you a wandering arc, stuttering wire feed, or a hot cable. Match the clamp’s current rating to the amperage you actually weld at, and grind a bright spot on the part or table where the clamp sits. A spring clamp bolted to the table with a proper lug is more reliable than relying on a magnet touching a dusty surface.

Magnets can also cause arc blow. Strong magnetic fields near the joint can push the arc sideways, which is most noticeable with DC welding. If the arc suddenly wanders or spatter climbs, move or remove nearby magnets and try repositioning the ground. Keep clamps and magnets away from the joint itself. Spatter fuses to threads and magnet faces, so a coat of anti-spatter spray on clamp screws and a brush after each session extends their life.

Finally, watch heat. Clamping a part rigidly on all sides can crack a weld as it cools, or lock in distortion. Tack in a sequence, release where you can, and let the part move a little as it contracts. Welding on a table also heats the top, so let it cool before oiling it or the spray will smoke.

What more money buys and how to maintain it

At the low end, tables are thin-topped, holes may be punched or poorly deburred, and legs can wobble. Magnets and clamps at this level work for light tacking but may have weak threads and loose jaws. Spending more typically buys a thicker top, cleaner hole tolerances, a better finish, stronger legs, and clamps with ground threads and replaceable pads. Cheap accessories that do not match the hole size are common, so verify the specification rather than trusting the product photo.

Upkeep is simple but regular:

Scrape or brush spatter off the top and out of the holes after each session. A tap and a hole brush help.
Wipe bare steel with light oil once cool, or keep it covered between sessions.
Clean clamp threads and magnet faces; replace any magnet with a chipped face.
Check cart casters, bottle chain, and leg bolts periodically.
Retire clamps whose jaws have bent or spread.

For a first buying order: pick the table or fixture plate that matches your shop space and the hole size you want, add a cart only if you need to move the machine and cylinder, and start with a modest magnet and clamp set. Add specialty clamps once you know which joints you repeat.

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FAQ

Do I need a welding table, or is a welding cart enough?

A cart carries your machine and cylinder but its top is usually too thin and small to serve as a flat reference for squaring up frames. If you build frames, brackets, or anything that must be square, a table with a thick, flat top matters more. Many home shops use a cart for the machine and a table or fixture plate for fit-up.

Should I choose a 5/8 inch or 16 mm hole fixture table?

The two sizes are nearly identical, so choose by the accessories you plan to buy: pins, stops, squares, and hole-pattern clamps. Make sure their stated hole size matches the table. A snug fit can bind in a hole that has rust or spatter, so keep the holes clean.

How strong should welding magnets be for beginners?

Pull ratings come from tests on thick, clean mild steel, so real holding force is lower on thin, rusty, or painted stock. Buy a margin above the weight you expect to hold and keep magnets away from the weld zone, since heat weakens them. They hold parts for tacking but should not be relied on as the only restraint.