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18th Mar 2012, 01:05 AM #1.
- Join Date
- Nov 2008
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- Perth WA
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- 71
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- 6,459
Sandvik Coolant Fed Drill Bit Puzzle
Saw this at a second hand tool shop this morning and was intrigued. Can anyone suggest how they created the coolant passage ways inside the spiral flutes? There are two inlet holes at the rear end of the bit.
BT
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18th Mar 2012, 10:46 AM #2Banned
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- Jul 2011
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- Melbourne Australia
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- 1,376
Bob.
I have it in the back of my mind someplace that they drill straight holes through the shank, then hold both ends, and induction heat them and put the twist in. Then creep grind the flute’s .
Phil.
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18th Mar 2012, 02:49 PM #3Member
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- Oct 2002
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- Central Coast, NSW, Australia
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