JET JMB-UMB-HD Heavy-Duty Universal Mobile Base (708119)

I recently purchased a new JET 708781K JWSS-CS-PF Supersaw with 30" XACTA fence and slider that tips the scales at 420 pounds. I wanted to buy a heavier duty base than my existing HTC or Delta bases (HTC 1000 and Delta 50-345).Although the HTC and Delta bases are good, there really is no way to compare it to the Jet universal base. The other two bases support 300-400 pounds and the Jet supports 1200 pounds.The Delta and HTC took a significant amount of time to assemble; the Delta about 2 hours since you had to make your own wood stock and the HTC about an hour since there were many bolts to install.The Delta and HTC both lift up the machine off the ground with foot levers. This works ok if the tool is not too heavy. The Jet base casters just lock or un-lock, NO tipping of the machine in anyway, which gives me piece of mind with a 420 saw.Since it is designed to stay off the floor permenently, the base actually lifts the machine 3/4's of an inch off the floor as opposed to the HTC which is a little less than a ½ an inch. This was not a big deal for me, but it is different. Since the casters have to support the machine all the time, they are super heavy duty.The best part of this base is its ease of assembly - NO TOOLS REQUIRED!It took me longer to unpack it from the box (about 10 minutes) than to actually assemble (5 minutes). The corners are very heavy duty with welded construction (I uploaded pictures for everyone). To assemble, you take the cross bars and simply slide them in the slots. There are spring loaded pins that keep them in position. You can change the size of the base in under a minute, but pulling the pin and sliding the bars larger or smaller, that's incredible!With the HTC, you can adjust the size by disassembling the many nuts and bolts. With the Delta, forget it since you had to cut the wood to specific dimensions. The Jet base can be reconfigured to fit any tool in minutes.Do yourself a favor, spend the extra money to get this base that will last you a lifetime, will allow you to use it in 5 minutes and get you back in the workshop and make some more sawdust!

Bought this, along with the Jet-Mobile Base Extension Kit (708158) for the Jet 725003K ProShop II 230V 52" Rip with Cast Wings after reading every review I could find. The products are well made and work well on a very smooth garage floor. (Some reviews of the base with extension indicated they required additional reinforcement, but this could be due to stress applied by rougher concrete, or other, floors. Alternatively, since my application allowed me to keep all of the support members at their shortest and, hence, strongest lengths, it may not represent stress situations other customers ran into.) The hard plastic (or rubber?) casters should not be a problem on a smooth floor but might take abuse on rough floors. While I am satisfied with the product quality, I would have preferred to get it at a slightly lower price point.It took some thought to figure out how to gently set a reasonably heavy (326 lbs), already assembled, table in the base without any help, so I suggest anyone purchasing this get help or plan ahead when it comes time to put your heavy duty workshop tool in it.

I purchased this base for a new Jet Exacta table saw with 50" extension table. I decided to buy this particular base since it was made/sold by Jet and therefore should have been designed to fit their products. As a universal base it is adjustable to fit various dimensions, however in order to get a reasonable fit with my cabinet base I had to cut off 3 1/4" on two of the straight metal bars and then drill new 1/4" holes in the metal bars for the spring loaded pins to snap into. Once this modification was made, the saw fits pretty well in the base, if you take a little more time you could make the fit very close.The wheels operate very smoothly and will easily allow the saw to be moved over smooth surfaces. However, with all the wheel locks engaged (including the matching extension rail kit) the whole assembly will still move rather easily it even moderate pressure is exerted on the saw. It appears as though the wheel locks are weak and don't actually prevent the wheels from rotating at all.Overall the product will operate as designed, but with some issues and modifications required (depending upon your dimension needs). A unit sold by Jet should be designed to fit one of its most popular cabinet saws without the need for shop modifications - a factory "fix" would be incredibly easy so I do not understand why Jet hasn't done so...

I was very impressed with the heavy duty design. The good quality casters the ease of adjustability to accommodate various power tools. Will probably buy another one.

Having a small shop, I get to be creative in using my available space. Over the years I've used many mobile bases for my various equipment - some good, others literally dangerous to operate. I use a 500 lb bandsaw. Moving it had been a challenge because it's top heavy, and I had originally mounted it on a flimsy, three-wheeled mobile base. Too many times I came close to tipping it over. For years I knew how to make it safer, but never made the change to a better base... until I got fed up with the dangerous situation. I decided on this heavy duty base, and am glad I did. The assembly instructions were clear and intuitive. I modified my installation to widen the footprint and further reduce the tipping potential. I mounted a 3/4 inch solid-core plywood panel to the base of the saw. I cut it about 6 inches wider (all four sides) than the saw's base, bolted it to the saw base, then bolted the ply to the mobile base. I opted for the heavy duty model, even though the less expensive model would have worked. For me, it's the perfect solution. Soon I'll be replacing my other lesser quality mobile bases with two just like this one.