Can any one identify a source for this tool?

[mschpero]

Probably McMaster Carr. I use one for tensioning engine belts. Grainger is another source

[Nicholson58]

It’s a Belt Tightener. Search on line by that name or buy one from a major auto parts supplier.

[capt jgw]

Originally Posted by Ballsnall

Seems like more effort than just using a screwdriver or pry bar, regardless it's a good way to apply the correct tension if used with a V-Belt Tension Gauge which is more important than how you apply the tension.

I once punched a hole in a Balmar alternator using a screwdriver. Didn't affect it working but at $500 it was a "don't do that again" moment. Now I use the handle end of a hammer. Rubber coated and much larger contact area. But the screw jack is better, puts tension on the pulleys using the pulleys alone. No pressure on anything else.

[capn ken]

Originally Posted by KenK

This came with our boat--used for holding engine pulleys when tightening a belt. It worked fine for that purpose but we used it trying to push out a bolt from our anchor roller and it broke. There is no manufacturer identification, Google Lens couldn't help nor just Googling belt tensioner and similar terms. It's about 4" long and extends to 8". We'd like to replace but may try welding if another can't be found.
Thanks in advance for any helpful answers.

Try Moyer marine , the Afourians

[AMCarter3]

I too own the MSC product. It is not "junk". It works well and it can be broken if mishandled. It works far better than trying to hold a lever in place to set belt tension... that old technique requires 3 hands. Using this device, both of your 2 hands are available to set and tighten the alternator. I have not found a better product.



And by using this MSC product, you can accurately measure and set the belt tension with a tool like the Gates 91132 Krikit V-Ribbed Belt Tension Gauge or the Gates 91107 Krikit V-Ribbed Belt Tension Gauge. This is FAR more accurate than guessing by pressing on the belt with your thumb. Studies have shown that the old "use your thumb" technique is WRONG more than 90% of the time.

[Jetx]

Originally Posted by Smokeys Kitchen

We have one just like it. The original welds broke upon easy use, but we just had it re-welded about 3 years ago and it has worked fine since

Same here. Ours broke and had to be re-welded. But very handy tool, so worth the trouble.

[bullislandken]

I made a similar device with white oak and 3/8 all thread with nuts and washers. Has come in handy a couple times over the last 45 years.