Be that as it may here is a neat idea from flyboy accessories for cutting larger holes in sheet metal.
Enlarging hole in sheet metal.
Enlarging holes in sheet metal i usually just use a the next size bit or if its not a critical part just use a move the bit around to enlarge the hole.
The tapered design will centralise then enlarge the hole to the required diameter.
However having see the posts on the step drill i thing that is a much better idea and will have to looking into them.
For clean precise holes in thin sheet metal make a wood sandwich.
Tod s workshop recommended for you.
You start off by drilling a small diameter pilot hole and then drill gradually larger holes until you get.
It s meant for creating lightening holes of the type seen when building aircraft or maybe just toolboxes and furniture that are built like wwii fighter planes.
Elber arias 7 726 views.
Enlarging a hole in metal yersmay posted in tools for home building on july 21 2007 01 14am i have to enlarge four holes in 1 8th inch steel from 3 8 to 1 2.
Online shopping for hole enlarging drill bits metalworking multipurpose drill bits from a great selection at industrial scientific store.
Place the too large broom handle against the hole it won t go through too big fill the dam around the broom handle with black beauty and as much water as it will hold.
Simply sandwich the sheet metal between two pieces of wood and clamp everything down on a table or workbench.
Start up the drill motor and hang on.
The drillmax reamer is made for more general purpose works and will fit into any power tool chuck.
Opening up an existing hole to a larger size.
These reamers are ideal for.
Aligning two holes where there is overlap.
The broom handle will wear down but the hole will get larger.
I ve messed with trepanning tools abrasive wheels hole saws and all manner of other stuff for cutting large holes in sheet metal.
As the handle wears it will go further into the hole.
Enlarging a hole in metal with hole cutters duration.