Drilling into mast & boom - Page 2 - SailNet Community
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post #11 of 13 Old 01-28-2013
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Re: Drilling into mast & boom

Isn't there a rule about using cutting oil on aluminium when drilling... or not oiling... Can't remember if it's one of the other. And you want to drill at low speeds I think. There must be a machinist here who can give some advice.

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post #12 of 13 Old 01-28-2013
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Re: Drilling into mast & boom

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Originally Posted by RobGallagher View Post
Isn't there a rule about using cutting oil on aluminium when drilling... or not oiling... Can't remember if it's one of the other. And you want to drill at low speeds I think. There must be a machinist here who can give some advice.
As far as I know very slow speed, cutting grease and a Cobolt drill bit, is for Stainless. Aluminum HS drill bit and a speed what you are comfy with.

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post #13 of 13 Old 01-28-2013
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Re: Drilling into mast & boom

Hello all,
agree with Simon V, drilling into aluminium just requires a sharp drill and relatively high speed drill. One trick when marking out is to tape the area in masking tape for two reasons, 1) when marking out you can easily mark the tape as opposed to the alumimium and it will not rub off any where near as easily. 2) when drilling the tape will actually assist you set the drill in the correct spot to drill, using a metal centre punch to identify the area to drill then use a small drill to ensure the centre it located correctly. This will ensure that each and every hole lines up (hopefully)
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