Drill bit set - HSS or not?

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Richard_C

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I've just been given a nice set of drill bits by a friend who was clearing out his deceased father's garage. They are very old - probably 40 years plus - and he lived in the USA for a while.

All brand new, opening the box released the nostalgic smell of the machine machine oil from when they were packed. Steel box says Huot St Pauls, but as far as I can see they specialised in the index boxes not the bits. 1/16 to 1/2 in 64ths. Almost too nice to use, but no point owning them and not using them. But should I only use them on wood I wonder.

Very bright steel throughout, shafts are lightly marked with the size and on the bigger ones 2 sets of letters: US and HS. Its HS, not HSS. So I wonder, was that how HSS was named back then, or maybe still is now in some countries?
 

Myfordman

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Wood drills have a spike point to dig into the wood to stop them wandering. A metal drill will have a 118 degree tip ie much blunter than a wood drill.
Almost certainly will some form of HSS as CS would not last 5 mins.
Tools are meant to be used, it you blunt one then just sharpen it like any other tool.
 

Gordon Tarling

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To me, 'HS' has always meant the same as 'HSS', so they should be decent drills and capable of drilling most metals, as well as wood.

G
 
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