what sort of setscrew did they use in that side 45 degree angle threaded hole they used in their mortise cylinders?
I want to buy one at a hardware store but don't know what to ask for.
Thanks.
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18 years ago
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18 years ago
IF its a screw, then something under 1/8" width STRAIGHT What you want is an electricians type, but most new hardware guys have no clue what that is...
a norman straight screwdriver, flares out in width from the front flat.. if the blade is 1/4" wide, then it gets wider just behind, to perhaps almost 3/'8".. whereas an electricians type stays that width all the way.. you are looking for like a 3/32" round..with a straight tip. and maybe its an allan? --Shiva--
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18 years ago
if the blade is 1/4" wide, then it gets wider just
why do they get wider like that??
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18 years ago
who knows, strength for 'normal usage'? maybe??? I am guessing when first made, you take flat bar stock and a forge, hammer it down, then grind it down to the width/thickness for the screw slot.. but electrical stuff hasnt got the room, so they made them straight shaft to get in tighter holes.. also easier to insulate the body, so as to not cause a short.. Its hard to insulate a differing diameter/shape successfully, but pretty easy to 'sleeve' a round bar consistent diameter --Shiva--
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18 years ago
That sorta makes sense, when you slam it, it expands, then you trim away.
I recall wrapping tape on screwdrivers for that very reason.
As good a theory as any!