Correct router bit

[mchad]

I need to cut a 1/2" wide by 1/2" deep channel in a fiberglass panel. One end of the channel will reach the gelcoat, so I need the cut to be clean. I am going to use a router, and need to know what kind of router bit to use. Would a standard carbide bit be ok? I saw fiberglass bits online, but the widest was only 1/4"...

I don't trust the brain surgeons at my local home depot for the right recommendation...

 

[gcolton]

"One end of the channel will reach the gelcoat"

That is a very thin amount of material you are leaving. I would be concerned with being able to control the depth that exactly. What is the panel that you are grooving and what are you going to put in this grove?

I think that a new(sharp) carbide bit would do the job. However, I would sure like to be able to make a test run. I have never routed fiberglass of that thickness. You will want to make at least two passes and probably three. I cannot think of any other type of bit that would do any better.

Is this panel removable where you can do the work on a router table? That would give you better control of the variables.

G

 

[KnottyBuoyz]

Score the f/g along your projected cut lines. This will prevent the gelcoat from cracking and splintering. If it's a straight cut you'll be fine. When routing f/g wear proper protection the stuff is murder not to mention itchy as h*ll!