[Mitch757]

What's the best method to cut the 2 inch hole in the firewall for the heater box.
I have the 2 1/4 inch knockout punch but that leaves little edge distance.

Suggestions?

Thanks,

Mitch

 

[rapid_ascent]

See if you can find a 2" punch.

 

[JoopSJ]

I don't think it has to be a perfect circle.
I just used a Dremel tool and it went pretty easy.

 

[alpinelakespilot2000]

What's the best method to cut the 2 inch hole in the firewall for the heater box.
I have the 2 1/4 inch knockout punch but that leaves little edge distance.

Suggestions?

Thanks,

Mitch

If you search the threads you'll see a number of suggestions. I used a 2" bimetal hole saw that worked just fine.
Good luck.

 

[cajunwings]

2? hole

I cut mine with a 2? hole saw in a drill. Had a helper back it up with a wood block. Used a dremel with a sanding drum to smooth up the cut edge.

Don Broussard
RV9 Rebuild in Progress
57 Pacer

 

[PhatRV]

https://www.homedepot.com/p/Milwaukee-2-in-Hole-Dozer-Bi-Metal-Hole-Saw-49-56-9624/202327750

I use this if you already has a compatible arbor. I've collected a few different sizes from my build so far.