Sure has me buggered.

Gotta look up how the hell a Scale-Buoy Device is used for boiler de-scaling and several of the Piccardi experiments !

Brilliant, thank you

It looks like the black metal contraption opens up and measures something which in turn indicates the angle of something else.

I served my time as a maintenance fitter and have done a bit of work on diesels but have never saw this gadget. 

Is it a Go - No Go gauge for  measuring the wear on things that are roughly between 1/8" and 3/8" ?

If that isnt even close we require another clue Hoodeng

I should fukin know this ! 

Sounds like there is a spring involved ? 

The trigger guard probably saves your nipple getting accidentally cut off when you clip it onto your shirt pocket.

You guys are close, but if i showed a picture from above the brand name alone would give it away. It is 120mm long.

Yes, it uses the spring or deflection in the part it is checking to give a reading of lbs/kg force.

When i got one it was at the suggestion of the part it checks manufacturer, as we were having failures in gang sets of the part.

One thing we did find after using it, nearly every set we checked were under spec.

These days there is usually a snake involved in what was usually done by individual sets.

Cheers.

Belt deflection gauge!  Thanks H!!

That's the one Steelo! The one i have is a Gates. We were having burn-ups on four sets used on Detroit 71 Series fan drives, these engines were fitted with a larger diameter fan than std for high ambient temp applications, they would seem ok for quite a few engine hours then rapidly deteriorate over a couple of hours. 

As all the sets used were matched by Gates, their assessment was that they were under-tensioned on installation and as the surface burnished into the pulleys they would get to a critical point and fail. They told us not to be surprised at how much more tension we would be installing at, and re-tension after a set number of hours, they were right, first thing was to doubt what we had just done and wait for burnt up bearings in the drives, didn't happen and the belts after seating and adjustment would put in thousands of hours.

Gates did say that the drives were right on the edge of needing to go up in spec. These engines were also used over the whole rpm range and would have quick throttle applications and load changes, would have been a different story if it was just set and forget on the governor.

Cheers.

I don't quite get that gauge.

You can see/hear when it reaches a certain tension but there did not seem to be any mention of how far the belt deflects before the click is heard.

Even the Harley Davidson belt tension gauge that is set to how many ever pounds has that o-ring on it so you know how far the belt should move before the tension is correct.

Two ways of doing the same thing, Far, the Harley gauge works linear, for a ten pound force in a straight direction will give a deflection of a given amount in that same straight direction. As Steelo said, the Krickit works a different way to give the same result, a set force is applied to the belt indicated by the click, [same method as Harley], but now we are measuring the curvature created in the belt to push the indicator bar through the gauge and give us a reading on the face scale.

Some of you guys would have had XF falcons, they were famous for screaming air con belts which was a singe narrow type, after i got my XF ute i replaced the belt and adjusted by hand, not long after it started chirping when turned on, as it was mounted low on the block it was a pig to get to, it also had a jack screw adjuster instead of a slotted quadrant and bolt [this was telling me something already]. To access this thing you needed a hoist or pit. When i used the setting tool using  Gates recommendation of pounds force the belt was a lot tighter than i would have set it previously, it worked, no more belt changes, and no damaged drives.

Cheers.