tapping castings

This topic has 3 replies, 3 voices, and was last updated 20 October 2015 at 18:47 by Michael Topping.

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20 October 2015 at 15:54 #208617
mick70
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@mick70
i was told i should drill the castings for my mill dry same for boring out motor holder.

do i tap holes dry as well?

am assuming yes.
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20 October 2015 at 15:54 #29546
mick70
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@mick70
20 October 2015 at 15:59 #208618
JasonB
Moderator
@jasonb
Grey Cast Iron can be worked dry for all work so no need for tapping fluid, the graphite in the metal is enough to lubricate things.

Edited By JasonB on 20/10/2015 15:59:17
20 October 2015 at 18:47 #208647
Michael Topping
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@michaeltopping17870
I find that a brush with paraffin helps the taps cut a clean thread.

Michael
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tapping castings

tapping castings

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