Reducing a pattern - Router Forums
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post #1 of 37 (permalink) Old 08-22-2015, 08:21 AM Thread Starter
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Default Reducing a pattern

I have made a template and have flush trimmed to make copies but need to make another copy 1/4" smaller than the original template. Is there a way to do this? Thanks
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post #2 of 37 (permalink) Old 08-22-2015, 08:32 AM
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I have made a template and have flush trimmed to make copies but need to make another copy 1/4" smaller than the original template. Is there a way to do this? Thanks
reduce the size of the bearing by ˝''...
go to a lager dia bit if need be to get the reduction...
ie... 1'' dia bit w/ a ˝'' dia bearing...
or...
step reduce by Ľ'' and making a new pattern that will be 1/8'' smaller...
do this twice...
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post #3 of 37 (permalink) Old 08-22-2015, 09:41 AM
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post #4 of 37 (permalink) Old 08-22-2015, 09:41 PM
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post #5 of 37 (permalink) Old 08-22-2015, 10:52 PM
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Or use a guide bushing that is 1/4" larger in diameter.
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post #6 of 37 (permalink) Old 08-23-2015, 06:34 AM
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I have made a template and have flush trimmed to make copies but need to make another copy 1/4" smaller than the original template. Is there a way to do this? Thanks
plan ''B''......

cut a copy...
leave the template and copy sandwiched together w/ DS tape...
now using a rabbiting bit w/ the bearing adjusted for depth of cut you need to cut the copy to size follow the pattern w/ the bearing and cut the bottom piece down to size...

http://www.infinitytools.com/Rabbet-...ctinfo/00-556/
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post #7 of 37 (permalink) Old 08-23-2015, 06:58 AM
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Or use a guide bushing that is 1/4" larger in diameter.
Mike..
isn't that going the opposite way????
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post #8 of 37 (permalink) Old 08-23-2015, 07:42 AM
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Depending on the thickness of the template, wouldn't the quick way to go be to cut a 1/4" wide rabbet (I'm assuming that the pattern is reduced 1/4" all around - otherwise cut an 1/8" wide rabbet) around the pattern to about 1/2 of the thickness, flip it over and use a pattern bit to cut off the lip? this would be done on the copy of course.
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Last edited by tomp913; 08-23-2015 at 07:45 AM. Reason: Added note tomp
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post #9 of 37 (permalink) Old 08-23-2015, 07:50 AM
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Depending on the thickness of the template, wouldn't the quick way to go be to cut a 1/4" wide rabbet (I'm assuming that the pattern is reduced 1/4" all around - otherwise cut an 1/8" wide rabbet) around the pattern to about 1/2 of the thickness, flip it over and use a pattern bit to cut off the lip? this would be done on the copy of course.
wouldn't that ruin the original pattern???...
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post #10 of 37 (permalink) Old 08-23-2015, 08:01 AM
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Would just creating a negative template serve your purpose? Bushing to whatever size you want from there as often as you want without all of the hassles??

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