T
Tris Zanker
I'm going to buy my self a core bit for 4inch fan holes, what size do you guys have 107mm or 117mm and what makes are good?
Discuss diamond core drill bit for 4 inch fan holes in the Electrical Tools and Products area at ElectriciansForums.net
If you're going to connect the outside grille with solid duct, then you can use 107mm. The duct will be a snug fit in the hole and as mentioned above there's more brick left for fixings.
If you're going to connect the grille with flexi tubing then you will need 117mm as the flexi won't fit through 107.
I use Norton bits which I get from Screwfix.
Make sure you are using a drill with a clutch release or you're likely to break your wrists off. I use a Bosch Pro DRE-26.
If you're going to connect the outside grille with solid duct, then you can use 107mm. The duct will be a snug fit in the hole and as mentioned above there's more brick left for fixings.
Thanks... i'm going to be using my sds drill for the time being as i've just brought a new van so moneys rather tight. think i'm going to get a 117mm one.
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