rider997 wrote:
JoeChiOhki wrote:
There's a type of router bit, its used regularly in RV construction for cutting out Windows and vents in panel/plywood/etc... when RV's are constructed.
Usually a full sheet is installed on a wall, once its glue has set, a router is plunged in to cut out the wood over the window or other opening.
What kind of router bit is that? What is that normally called?
From when I watched them do it years ago, it seemed to have a roller or something of some kind on it to keep it from cutting into the framing when they removed the wood for the openings.
Depends on how you guide the cut. If you want to use a template, you can use the router base OR a guide bushing inserted into the base to guide your cut, and buy a solid carbide upcut spiral bit. You can plunge with the bit and it'll make a nice cut. You can also purchase a template bit with a top bearing guide.
A flush trim bit will have a bottom bearing guide, but you cannot plunge with a flush trim bit (since the bearing is on the bottom of it).
If you want to guide the cut by the internal wall framing, a bottom bearing flush trim bit will be by far the easiest to use. You can get a solid carbide flush trim spiral with a small diameter for a small corner radius, but this isn't usually required for RV windows with very large corner radii.
I highly recommend Whiteside router bits... They're actually less expensive than a decent bit at the big box stores (Freud) and last unimaginably longer and make dramatically cleaner cuts than the cheap Chinese bits.
http://www.whitesiderouterbits.com
Thanks, the corners are all going to be tiny radius, as this unit uses 90 degree corners instead of the radius type found in newer RVs. I'm mostly looking for a somewhat fool proof way for me to get all the openings cut out right, and the easiest way for me to do that is install the wood sheet and then cut the openings out of it after its in place with a router.
