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In industrial use, the more recent VFDs seem to last "about" as long as the motors they run, in my fairly limited experience. Where I work, we would "expect" around 5 years of continuous 24/365 operation from a standard motor and around 8 years from a premium motor. In most cases, we have...

Maybe a daft question: are you sure the motor is slowing down? I've known compressor belts to slip a little and the pump runs audibly slower. The squeal you'd normally expect from slipping belts isn't audible above the general noise of the compressor. Hot belts can smell a lot like hot motors...

The pressure rating looks like 200 PSI Working Pressure to me. I think the .130 is the thickness of the steel used for the tube and for the pre-formed ends of the receiver.

Good belts certainly make a difference. However, it may be rather less pronounced on a typical Multitool conversion (fixed-speed bench grinder, typically 3600 RPM, usually less than 1HP, and IIRC a 5 1/2” drive wheel) than on a typical variable-speed 2x72 with a 2HP motor. I’d suggest trying a...

Add the blotters. They are used for a reason and the reason is basically keeping the operator alive.

Working on the premise that you would not be asking the question if you had access to a Rotabroach, the best bet is likely to be a hole saw. The Carbide-tipped ones from Starrett and others cut a much cleaner hole than the old-school HSS bimetal ones, though I've only seen them in metric sizes...

If you need one, you will already know. As you asked the question, it's a pretty safe bet you don't need one. For measuring low pressures, there's not much to beat a U-tube manometer. One can be cobbled together very easily from a length of clear flexible tubing and coloured water. For lower...

Felco C7. Nothing more to say.

As far as I can tell, "Perfect" was used by Parkinsons for vices/vises fitted with the Parkinson-patented Quick Release mechanism. "Samsonia" was used for the cast-steel versions, while the Cast Iron versions were just marked as "Parkinsons". There were different model series, of which J was...

"Using" can cover a lot of territory. What type of chisels and what type of use? There is normally a tradeoff between various properties and the optimum balance between these properties will depend on the use for which the tool is intended. If you use a chisel for a purpose for which it was...

is it self-centring? As in: when you rotate the handle, do both jaws move in opposite directions?

Just get it smooth/flat enough for her needs and start using it. Whilst a 1" hardened steel ball might leave a mark when dropped from a height, it's a very long way from it's intended use. It's pretty unlikely any of the materials she uses will be harder than the rail: I think Platinum is...

Yes, it's a Quick Release mechanism. Parkinson patented their "Perfect" buttress-thread screw and quick release system and used it in most of their vises: the "Parkinson Perfect" were the cast iron range of vices and the "Samsonia" were the cast steel versions. I never really understood why...

Thin sheet, I'd probably use none of the above and get some carbide holesaws. https://www.tooled-up.com/starrett-carbide-tipped-stainless-cutting-hole-saw/prod/300895/ RS do something similar at a similar price. Most of the really cheap ones that look similar on ebay also work very well and...

If you scrap it, make sure any capacitors are discharged before opening it up. Not sure about a soft-start, but big VFDs usually have a nice big Aluminium heatsink inside that anyone who makes stuff stuff will find a use for.

I would assess carefully whether you actually need that level of grunt. Several years ago I killed a 450W B & D Industrial SDS drill (it was through abuse, but I had no alternative at the time). Replaced it with a 30mm capacity Atlas Copco SDS. The B & D had been superb for just about...

What drive are you using? Can you provide a link to an online manual?

I'm not the worlds most delicate individual and though I haven't actively tried forcing things, after 40 years of spring-ball ratchets it took a long time to remember to push the buttons. I can safely say that neither my 3/8" nor my 1/2" Bahco ratchet will allow the sockets on or off without...

I'm on a different continent with a different power distribution system, but I suspect you'd be better off with a new single-phase motor. Compressors are usually a pretty hard-start application and don't really lend themselves to the slow ramp-ups that are the norm for VFDs. Most of the...