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Originally Posted by bobj3 Hi Tom
What is the big deal with a 40mm brass guide when most routers can't use it without a new base plate, I see Bob & Rick are using 1 1/2" one on some of the fixtures, what can be done with one that is 40mm (1 5/8" ) that you can't do with one that's 1 1/2" I still use the 1" one and it works for most of the fixtures I make or use.
Most bits that get that big should not be used on a plunge/hand held router anyway I think or I'm I wrong , most the ads I see, say to be used on a table router Only when the big gets
1 1/2" bigger, that's alot of steel spining under the router plate and if it gets hung up best hold on.
But I'm just asking 
Bj |
Thanks Bob for asking the questions:
To start all my guides are steel though I think brass is better. Most routers are unable to use 40mm without a new base plate (Except Makita and Hitachi in Australia.
I agree there is very little difference in the two guides you mentioned above and I am sure I could have used the smaller one but the 40mm guide is a regular size here in Australia.
You mention that you manage to complete all your projects or processes with the 1" (25mm) guide One of the reasons for the 40mm is there is a greater number of cutters that can be used 1" will restrict the number.
Another reason for the 40mm guide is that the cutter is usually visible when doing the process. (I would use the 40mm guide with the 2-6mm cutters not just for the larger cutters)
There is less chance of the cutter overheating say a 12mm cutter in a 16mm guide. also the 'swarf' will dissipate more readily using the 40mm.
Finally from a safety point of view: when using small cutters 1/4" they are usually short in length therefore sometimes difficult to reach the required depth because the collet (Chuck) will rub on the top of the guide wherar the 40mm guide will allow the chuck to penetrate through with safety.
Most larger cutters should not be used in a router without variable speed control
Tom
Thanks again for asking the questions