tools
I need a fixed base machine for a 2" to 3" diamond cutoff wheel. Most typical tools for cutoff wheels are angle grinder type hand held units. I need a fixed base machine, basically a motor with an arbor, ideally with speed control and can be clamped to a table.
Does such a tool exist? If so, what is it called?
Similar tools are also available for automotive trim removal. They are often called "automotive trim removal tool" (go figure, eh...)
Use a deep well socket and ratcheting set. Given that this is a 10mm nut, you don't want too much torque. Assuming you don't crush the surface you are tightening to and have a sufficient washer, you need to be concerned with torquing the bolt off. In certain cases, I've taken a 1inch diameter by 1.5ft lead pipe and put it on the end to get extra torque, but I advise against this if you don't have a feel for how much torque you are applying. You can find small scale torque wrenches, but if you are going to do so, I suggest you look up the recommended torques to apply to the bolt you are using (you need to know what type of bolt it is).
Best Answer
It looks like you're in luck. There's a good selection of tools called mini cut-off saws. They take a blade or wheel of the size you're talking about. Tiny saw blades and abrasive cutting wheels are readily available supply items. Diamond wheels ought to be easy enough to find. For example:
MicroLux® Mini Miter / Cut-Off Saw from Micro-Mark
The picture shows it cutting wood, but it also cuts metal (and other stuff) using the appropriate wheels.
A Harbor Freight knock-off: https://www.harborfreight.com/2-in-mini-bench-top-cut-off-saw-62136.html
Here's one of many at Amazon: https://www.amazon.com/TruePower-Speed-Cut-Off-2-Inch-colors/dp/B000VWHTUG.
Many offerings on eBay: https://www.ebay.com/bhp/mini-cut-off-saw