The lifeblood of a drill-making factory
Jun 14, 2019
1 minute
![f0047-01](https://article-imgs.scribdassets.com/7h8jeqb5s7nwjvv/images/fileX9MV97NA.jpg)
he grinding of HSS to make drill bits produces metal swarf, grinding-wheel particles, and heat. The drill blank is flooded with Houghton flute-grinding oil to reduce friction; reduce
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