Flint & Walling colour

[windybob]

Double nuts took the place of lock washers. Double nuts on bearings/caps were for getting the right clearance, or squeeze on the bearing. Tighten the nut to get the right tension, and lock it with a second nut. This is a place where a lock washer will not work. bolt caps here were not usually very tight, maybe just snug.

[mtblah]

Now I understand the mechanical theory behind the double nutting ...... thank you

[Kenneth]

Very well said Windy. Thanks

[Windcatcher530 Dan]

Another way manufacturers adjusted the clearance of the bearing caps was they put SHiMS under the bearing caps and as the babbit wore you removed the right amount of shims to compensate the right clearance and using only one nut tightening it down !!