Covex and concave washers

B

Brento

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What would these washers be used for exactly. I havent seen these before. I have 4 sets of them and i am still just organizing away in the shop and trying to find methodical homes for stuff.

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If they fit together it could be from some kind of alignment scheme. They don’t look like thrust washers to me.

John
 
They look like clamp washers. I have a box of them in two sizes, 3/8 & 1/2. When you use hold downs on a table, they should clamp fairly flat. Sometimes you just get too much of an angle and you use them to get a good flat surface for the nut to seat on. If not, the nut would be at an angle and maybe slip.
 
Eddyde said:
Spherical Washers, for situations where a threaded hole is not perpendicular to surface. I used them to attach my DRO scales to my mill. The castings were at slight angles off of where the scaled needed to be. Those washers made alignment a snap!
Click to expand...
Also used on turbines, for bolting together the horizontal joint and the high pressure piping flanges, we always used anti seez on the spherical surface.
 
I'm with uglydog; Belleville washers are springs. Stack 'em spoonstyle to make very stiff springs, or
antispoonstyle (bump-to-bump) for longer travel and weaker springs. Spherical washers are
roundside/flatside types, and unlikely to be bought in bunches and found afterward as leftovers.
 
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