Steel_City_Z
New Member
So I was drilling 60mm holes for my overflow box which uses 1.5" bulkheads in my 180. I was worried that it might take awhile so I decided to use my floor standing drill press instead of a hand drill to ensure I got straight holes. First hole took a while, but went ok, some chipping, the second hole went much faster and again some chipping, but I don't think it's anything serious in either case. However, when doing that second hole the vibration caused my drill press to slowly walk without me noticing. So the holes ended up being about a 1/4 inch (6.35 mm) too close together.
On the outside of the tank the hole is ground on the left side and slopes towards the hole. It doesn't seem too deep before it goes straight. I'm thinking I can just drill in the original spot. The hole would be an oblong over sized hole, but the long diameter would be 66-67mm and the gasket would cover it, which I think is ok. BRS lists the maximum hole size for 1.5" bulkhead at 86mm.
I've got an EMS overflow and since this is a rimmed tank it uses a gasket on the outside between the spacer and the tank. My plan was to drill it out and then leak test. If needed I'd probably just silicone between the gasket and the tank.
Thoughts?
Here's a view with the template overlaying the holes:
On the outside of the tank the hole is ground on the left side and slopes towards the hole. It doesn't seem too deep before it goes straight. I'm thinking I can just drill in the original spot. The hole would be an oblong over sized hole, but the long diameter would be 66-67mm and the gasket would cover it, which I think is ok. BRS lists the maximum hole size for 1.5" bulkhead at 86mm.
I've got an EMS overflow and since this is a rimmed tank it uses a gasket on the outside between the spacer and the tank. My plan was to drill it out and then leak test. If needed I'd probably just silicone between the gasket and the tank.
Thoughts?
Here's a view with the template overlaying the holes:
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