Tuesday, March 3, 2020

Inthebloc crankshaft grinder

Here's an interesting device found by a reader in Europe. It's a grinder for grinding crank pins in place without dismantling the engine.  The tool is in good shape despite its age- probably because the differences in electricity supply would have prevented its use.
 The patent dates from 1938 and there were more patents relating to this device over the years including this one from 1953 so it was a serious venture. The machine would be just the thing to redo one damaged rod in a situation where a complete rebuild would not be practical or cost effective. The engine had to be turning to use the tool, various methods were used, starter motor, belt to the front pulley but the company sold a powered roller arrangement for the rear wheel.
RT sales
Apparently they were more commonly used on heavy equipment or large trucks to keep the vehicle working and to repair costs down. 
Youtube video of device in use here.

There is little information on the company online but in 1979 the company was purchased by the Goodson Tools and Supplies for Engine Rebuilders company which is still in business today, though there is no mention of the Inthebloc machine. A similar company name Winona Van Norman of Kansas doesn't seem to have been involved with the device. 




thanks J.P.!

2 comments:

Unknown said...

Gosh. I wouldn't think a machinist could be found who'd grind just one journal (I've tried to find one). But I'm thinking of passenger car/light truck work. For "pulling spuds on a barge" (per the YouTube comment) this thing would be an excellent bodge. Still a bodge, though, no?

JP said...

I think the answer's in the next Utube vid commentary: "Using it properly is an art form". Think of the old conrod Babbit bearings, they were adjusted by hand using a scraper, and very reliable, I'm told.