During the demolition stage of my build I have managed to find and RSJ that was encased in timber. I have checked the SE and he has confirmed I can use it. This is good news as it will save me a few quid but I will need to drill some holes for M12 bolts. Am I going to need a special drill bit ? I think this might be hard going ?
Drilling Holes in an RSJ
- Thread starter RobH71
- Start date
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The sheer thickness of the RSJ means that things will be fairly hard work for a pistol drill but the metal is pretty soft as steels go so you’ll get there.
You’ll need HSS or cobalt drills for this, and as the diameter gets bigger, a slow drill speed.
Drill in stages starting at 5mm, then 8 then 10 and finishing with 12.5mm for a 12mm stud or whatever.
Keep the drill cool and we’ll lubed, and I’d buy new drill bits for this.
John
You’ll need HSS or cobalt drills for this, and as the diameter gets bigger, a slow drill speed.
Drill in stages starting at 5mm, then 8 then 10 and finishing with 12.5mm for a 12mm stud or whatever.
Keep the drill cool and we’ll lubed, and I’d buy new drill bits for this.
John
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DeWalt Extreme Hss/colbat drill bits are great.Need to keep well lubricated when drilling hole.
Not the hammer setting then?And a centre punch to start
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