Can i use a 7/16 bolt on this clamp instead of the 1/2 bolt

An undersized bolt can be used, but it is important to note that the bolt does not (should not) serve as the primary electrical contact. Make sure your crimped ring lead or lug on the ground wire of your welder makes direct contact with the bare aluminum area of the ground clamp frame. The steel bolt, washers, lock-washer, and nut are only intended to surround that joint and press the copper lug to the aluminum frame, maintaining good electrical contact. If you have any steel between the ground lug and the aluminum frame of the magnetic clamp, it will heat up (just like the part you are welding) and the ground clamp will not perform well (and could have a reduced lifespan).

I see these come in different amps. How do I pick the correct one? Thanks!

What's the highest amps your machine has

Has anyone used this on a cnc plasma table? if so does it work well? pros and cons please. thanks

Hello Cameron, I have a fabrication shop and use it for everything, arc, tig and plasma. On a table I would probably make sure to actually attach the ground via the supplied bolt with this product. I only clamp to it. I guess this might only be necessary depending on the amperage of your table. They state 300 amp so really should no be a problem, I wold just say it might do better bolted. Hate to screw up a long run on the table. Hope this helps son. Jack

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🔧 Elevate Your Welding Game with Magswitch!

💪 STRONG SHEAR HOLD - Designed for heavy gauge cables, ensuring stability even in vertical applications.
🔥 INSTANT GROUNDING - Experience seamless setup with a powerful magnetic grip that saves you time and effort.
🔄 ON OFF CONVENIENCE - Effortlessly switch between grounding and release for precise positioning without hassle.
🌡️ COOL UNDER PRESSURE - Finned design reduces temperature by 27%, enhancing tool longevity and performance.
🧼 HASSLE FREE MAINTENANCE - Stay focused on your work with a magnet that repels debris, making cleanup a breeze.

The Magswitch 300 Amp Magnetic Welding Ground Base Clamp is a heavy-duty tool designed for professional welders. With a unique fin design that reduces temperature by 27%, this clamp ensures a strong magnetic hold on any flat or round steel surface. Its ON/OFF switch allows for quick grounding and easy release, while the powerful magnet remains clean and free of debris, making it a reliable choice for various welding applications.

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Material	Iron
Brand	Magswitch
Item dimensions L x W x H	2.9 x 1.9 x 2.3 inches
Style	Heavy Duty
Item Weight	1 Pounds
Tensile Strength	300 Amps
UPC	712231542593 878628002931
Global Trade Identification Number	00878628002931
Manufacturer	Magswitch Technology Inc.
Part Number	Ground Clamp 300AMP with FIN
Item Weight	1 pounds
Product Dimensions	2.9 x 1.9 x 2.3 inches
Item model number	8100746
Is Discontinued By Manufacturer	No
Size	300 Amp
Power Source	Hand Powered
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No
Warranty Description	1 Year Manufacturer Warranty

Magswitch300 Amp Magnetic Welding Ground Base Clamp Holder for Welding Kit, Tools, Supplies and Accessories, Magnet Switch with On/Off Grounding Capabilities, (8100746)

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