Round baseplate for Bosch mrp23 - Router Forums
 
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post #1 of 6 (permalink) Old 09-18-2016, 03:13 PM Thread Starter
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Default Round baseplate for Bosch mrp23

Hi - I'm building a simple jig for a mortise that is 3imch deep and 3/4 wide. I have a 1/2 inch diameter but with a 3inch long cutter. So I'll need to do 2 passes.

In order for me to get the end to end width consistent I have stops and plan to just rotate the piece with the jig attached and I'll get a perfectly centered mortise.

Problem is that the base that comes with my Bosch mrp 23 plunge router has a straight edge on one side of the base plate. So the distance to the stops from the router plate differs depending on which side I'm on.

Figure I could just get an after market plate that is round and perfectly centered. I was going to try to make my own plate but getting it perfectly centered seems like I need an engineering degree and a machinist apprentiship.

I've searched the Internet far and wide and can't seem to find one. What am I missing ?
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post #2 of 6 (permalink) Old 09-18-2016, 03:33 PM
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Try Pat Warner - he makes a baseplate with adjustment that can be centered to the spindle. Either the package or the basic model which can be centered using one of the cone tools.

Precision Subbase Kit
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post #3 of 6 (permalink) Old 09-18-2016, 06:02 PM
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+ Pat Warner
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post #4 of 6 (permalink) Old 09-19-2016, 11:45 AM
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...why can't you orient the flat side of the base towards the cut in each of the directions...?

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post #5 of 6 (permalink) Old 09-19-2016, 05:19 PM
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This is a perfect job for guide bushings. If you don't already have the following items I highly recommend that you get them. The Bosch:

RA1151 centering cone to properly center your sub base plates or mounting plate to the router.
RA1126 quick release adapter.
RA1100 PC style guide bushing adapter that lets you use all PC style guide bushings in your router.

A set of brass PC style guide bushings with all the collars slightly under 1/4" length; available from many sources.

Four pieces of 1x3" set as shown in the Trend Varijig photo are your guides. Hold them down with double sided carpet tape; a small piece of 1x3" attached to one side of your routers sub base plate will keep it from tipping on large jobs.(But you won't need it for the task you described)
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post #6 of 6 (permalink) Old 09-20-2016, 06:49 AM Thread Starter
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Removing the plate and reinstalling 90degrees is a genius idea - thanks nick

Thanks Mike for the details. That setup may work and I could use guide bushings many times in the future. Just not sure if my 8/4 thick stock is enough platform to support the setup?
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