Glass hole saw sizing help

[Phyxius]

I picked up a 38mm hole saw for a 3/4" bulkhead. I need to get another one for a 1" bulkhead. I`m not sure if its 42,45 or 48mm size I would need. I believe its a 45mm but does anyone know for sure? I know you can be off a little and still be okay but too big and its trouble...

 

[CMcNeil]

just measure the outside diameter of the bulkhead then get the holesaw you need.

 

[Phyxius]

just measure the outside diameter of the bulkhead then get the holesaw you need

Wish I could....bulkheads are coming with the 38mm saw. I was hoping someone knew the size off the saw.

 

[Ocnreef]

1 inch = 25.4 mm

Do the math based on the recommended hole size for a 1" bulkhead.

 

[Phyxius]

Ocnreef,
Thanks for the help and thats what I needed. It gave me the correct size in conversion

 

[CMcNeil]

<a href=showthread.php?s=&postid=9669881#post9669881 target=_blank>Originally posted</a> by Phyxius
Wish I could....bulkheads are coming with the 38mm saw. I was hoping someone knew the size off the saw.

if they are sending you a 38 mm holesaw then it is probably the size you need.38mm sounds like it could be the right one.

 

[shag26272]

just remember that a 1 inch bulkhead needs a 1 3/4 in hole so a 45mm

 

[Phyxius]

shag26272,
Thanks. I had thought it was a 45mm but wanted to be sure. By Ocnreef`s conversion it came out to be that. Need to get some holes done and have ordered the 45mm also. Wanted to be sure and not get it too big

Thanks guys

 

[Ocnreef]

Where are you ordering your hole bits from? I need to cut some holes for a couple 1-1/2 bulkheads and some 3/4" bulkheads.

 

[shag26272]

search up the ebay seller Lau

 

[Phyxius]

Thats where

 

[cmart28]

For a 3/4" I thought you needed a 42MM. 42mm 1-5/8"

 

[Ocnreef]

Some 3/4" bulkheads list hole size as 1-1/2" and others list 1-5/8". The difference is between 38mm and 42mm.

<a href=showthread.php?s=&postid=9672645#post9672645 target=_blank>Originally posted</a> by cmart28
For a 3/4" I thought you needed a 42MM. 42mm 1-5/8"

 

[Ocnreef]

Thanks...........Found the seller.

<a href=showthread.php?s=&postid=9671650#post9671650 target=_blank>Originally posted</a> by shag26272
search up the ebay seller Lau