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Presuming the frame is aluminium then HSS or titanium coated drill bits will be fine,the thing to watch out for is "cold welding",to prevent this you need to use a lubricant but unless you have an engineers merchant locally it will be hard to get,the old fashioned dodge in small workshops was frequent dipping into a paraffin pot (heating oil or diesel fuel will work )
He who smiles in the face of adversity,has already decided who to blame
Artificial intelligence is no match for natural stupidity
I just use ordinary bog standard drill bits. Greenhouse frames are made of pretty slim material and a reasonably sharp drill bit will be through before heat becomes an issue even without any lubrication
I just used a cheapo steel bit & a cup o' water. As AP says it's pretty thin metal.
sigpic“Gorillas are very intelligent, but they don't have to be as delicate as chimps -- they can just smash open the termite nest,” -------------------------------------------------------------------- Official Member Of The Nutters Club - Rwanda Branch. ------------------------------------------------------------------- Sent from my ZX Spectrum with no predictive text..........
----------------------------------------------------------- KOYS - King Of Yellow Stickers..............
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