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Is there a way to be able to easily figure out where a cut will be by using bushings? EXAMPLE, If you were using a 3/4 bushing and a 1/4 bit,would it be around 7/8 from workpiece to end of cut. Thanks
George I think it would be the outside diameter of the bushing plus the difference in the inside diameter of bushing and the diameter of the bit. So 3/4 +( 1/4 (bit) - ___ (inside Diam of bushing) = distanceGEORGE6149 said:Is there a way to be able to easily figure out where a cut will be by using bushings? EXAMPLE, If you were using a 3/4 bushing and a 1/4 bit,would it be around 7/8 from workpiece to end of cut. Thanks
Great chart Bj, I saved it. So what I posted is correct?bobj3 said:Hi George6149
Here's a chart that may help.
Bj![]()
Coreychallagan said:George I think it would be the outside diameter of the bushing plus the difference in the inside diameter of bushing and the diameter of the bit. So 3/4 +( 1/4 (bit) - ___ (inside Diam of bushing) = distance
One of the template guys will let's us know if this is right or if I am full of it!
Corey
Bobbobj3 said:Outside
(inside Diam of bushing) = distance
Bj![]()
GeorgeGEORGE6149 said:Is there a way to be able to easily figure out where a cut will be by using bushings? EXAMPLE, If you were using a 3/4 bushing and a 1/4 bit,would it be around 7/8 from workpiece to end of cut. Thanks
Thanks Tom, I understand now. I think that is what Bob was trying to tell me as well.template tom said:Corey
There is no need to measure the inside diameter of the guide. The only concern is will the cutter fit through it ok
Tom
Harryharrysin said:Tom, whilst I wouldn't attempt to argue with you're answer, which is of course correct, if during lessons with you I had only received answers and not been taught how to do the calculations I would be in a very sorry state. Isn't it simple to just state that guide radius plus cutter radius equals offset?
In the case in question for a finished project measuring 8" x 4" using a 0.75" guide and a 0.25" cutter: 0.375" + 0.125" = 0.5" ie: cut-out is 0.5" bigger than the project or as Tom has stated 8.5" x 4.5"
curiousgeorge said:If I am reading all this correctly the formula to figure the offset would be:
1/2 x (bushing OD - bit size) = offset
Then take the offset, double it and add this to the dimensions of the desired opening. Is this correct? :'(