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template tom · 03-05-2007, 10:51 PM

Quote:

Originally Posted by GEORGE6149

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 hope I understand your question. Correct me if I am wrong

You wish to know what size of cut-out required in a template. This will be determined by the template guide and cutter combination to be used and of course the size of the project cut-out.

If the size of the material cut out say is 8" x 4" and we are using a 3/4" Guide and a 1/4" cutter.

The size of the template cut-out required would be 8-1/2" x 4-1/2"
I hope this answers your question

Tom

**challagan** · 03-05-2007, 10:56 PM

Quote:

Originally Posted by template tom

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

Thanks Tom, I understand now. I think that is what Bob was trying to tell me as well.

Corey

curiousgeorge · 03-06-2007, 12:56 AM

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?

**harrysin** · 03-06-2007, 03:00 AM

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"

template tom · 03-06-2007, 04:19 AM

Quote:

Originally Posted by harrysin

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"

Harry
I am sure you did mean minus instead of plus
Tom

template tom · 03-06-2007, 04:21 AM

Quote:

Originally Posted by curiousgeorge

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?

Correct
Tom

**harrysin** · 03-06-2007, 06:22 AM

Hi Tom, no, I did not mean minus, but, I must apologise for incorrect terminology,
the results from my formula give you the increase in the size of the cut-out compared to the finished size of the project, not the offset which would of course require the two figures to have a minus sign between them, I do hope that you will forgive this transgression, I shall attempt to do better in the future
you're former pupil Harry

curiousgeorge · 03-06-2007, 01:30 PM

It looks like we are all getting the same place by going down different roads. The correct answer is what matters irregardless of the method. I am going to get this template thing down even if it hairlips the governor.

It is good to have more than one way to accomplish a goal. I have found that some people will not understand one method or terminology, but when explained another way the light bulb will suddenly come on. By having more methods or different terminologies you have the potential of reaching more people and that is what this forum is all about. So keep it up Guys. Different is GOOD!

03-06-2007, 12:56 AM	#13
curiousgeorge Registered User Supreme Forum King Join Date: Nov 2006 Location: Fort Worth,Texas USA First Name: George Posts: 1,588 View curiousgeorge's Gallery	Report This Post! 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? __________________ George For those who haven't already done so... PLEASE! PLEASE! Fill in your first name and location in your profile.
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03-06-2007, 03:00 AM	#14
harrysin Forum Contributer Supreme Forum King Join Date: Jan 2007 Location: Western Australia Posts: 3,333 View harrysin's Gallery	Report This Post! calculating template offset 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"
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03-06-2007, 06:22 AM	#17
harrysin Forum Contributer Supreme Forum King Join Date: Jan 2007 Location: Western Australia Posts: 3,333 View harrysin's Gallery	Report This Post! Semantics regarding "off-set" Hi Tom, no, I did not mean minus, but, I must apologise for incorrect terminology, the results from my formula give you the increase in the size of the cut-out compared to the finished size of the project, not the offset which would of course require the two figures to have a minus sign between them, I do hope that you will forgive this transgression, I shall attempt to do better in the future you're former pupil Harry
	Top - Reply with Quote

03-06-2007, 01:30 PM	#18
curiousgeorge Registered User Supreme Forum King Join Date: Nov 2006 Location: Fort Worth,Texas USA First Name: George Posts: 1,588 View curiousgeorge's Gallery	Report This Post! Semantics, formulas, terminology? It looks like we are all getting the same place by going down different roads. The correct answer is what matters irregardless of the method. I am going to get this template thing down even if it hairlips the governor. It is good to have more than one way to accomplish a goal. I have found that some people will not understand one method or terminology, but when explained another way the light bulb will suddenly come on. By having more methods or different terminologies you have the potential of reaching more people and that is what this forum is all about. So keep it up Guys. Different is GOOD! __________________ George For those who haven't already done so... PLEASE! PLEASE! Fill in your first name and location in your profile.
	Top - Reply with Quote

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