Bosch guide bushing set - Router Forums
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post #1 of 17 (permalink) Old 04-14-2015, 05:43 PM Thread Starter
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Default Bosch guide bushing set

I just got the 7 peice set and the adapter there were no instructions in the box besides the instructions on the box, I want to use a flush trim bit and a straight bit so I can use a dado jig I made, which one can I use with the bosch 1617 router with a 1/2 shank, thanks for all the anticipated help.
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post #2 of 17 (permalink) Old 04-14-2015, 05:53 PM
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Hi, Eugd; I'm absolutely the wrong guy to give you the definitive answer, but I'm pretty sure the Gurus need to know the width of the Dado, and the diameter of the bits you want to use. There's going to be a bit of arithmetic involved.
For myself, I've simply used the baseplate as my 'bumper' for my dado jigs.
That's just me.
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post #3 of 17 (permalink) Old 04-14-2015, 06:10 PM Thread Starter
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3/4 dado, thanks
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post #4 of 17 (permalink) Old 04-14-2015, 06:15 PM Thread Starter
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I made the woodwispers dado jig and in the video he used a guide bushing, I wanted to be more accurate with the jig, usually use a board and do it that way but if I make some thing like a bookcase I don't always have them line up exactly, still new to all this stuff even though I been a diyer for several years, now trying a little more craftsman stuff these days, thanks for all your information
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post #5 of 17 (permalink) Old 04-14-2015, 06:15 PM
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You should look up "exact width dado jig". This will allow you to adjust the width of your dado to fit the board perfectly. This one is pretty good but there are many plans out there. You use a straight bit and a bushing. I'd pick a bushing that is 1/4" bitter than your straight bit. You actually use it to cut the exact width jig rabbets so it's truly a perfect fit.

edit: posted this just as you posted yours saying pretty much what I said. The WW's jig is pretty good. you can't go wrong.

You just have to measure and mark to align your dados. You could also cut a spacer board to help with your aligning the jig.
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post #6 of 17 (permalink) Old 04-14-2015, 06:32 PM Thread Starter
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That's the jig I made, so if it's a 3/4 straight bit I need a bushing that is 1 inch? But in the kit there is a 3/4 (ra1115) OD but bigger than that is the ra1121 OD which is 1 3/8. Did I buy the wrong kit? If so I can return it back to Amazon and get the correct one,
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post #7 of 17 (permalink) Old 04-14-2015, 07:08 PM
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It's not that simple.

With a 3/4 straight bit, the narrowest dado you can cut is 3/4". Given that 3/4" plywood is typically more like 23/32", your 3/4" bit doesn't work in a lot of cases. I mostly use 1/4" and 1/2" bits for dados. If your rabbets on each side the jig's throat are 1/8" then you can use a 3/4" bushing for a 1/2" bit and a 1/2" bushing for a 1/4" bit.

What I did was cut oversized rabbets on the jig (1/4" I think though it might have been 3/16"...) and then put a 1/4" plunge bit in the router and a 1/2" bushing. I adjusted the jig so that the rabbet edges were exactly the bushing width apart (and parallel by doing it at both ends of the channel). Then I plunged and ran the router the length of the channel. That took off just enough to leave a 1/8" rabbet (or lip if you prefer). Viola' - perfect offset.

So, I think you need a 1/2" straight bit. And maybe a 1/4" if you are planning to do smaller than 1/2" dados. Note that no plywood is actually the thickness it's sold as, it's always a tad thinner. I'd probably keep the kit if I were in your shoes

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post #8 of 17 (permalink) Old 04-14-2015, 07:10 PM
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You might want to check out Harry Sinclair's tutorials which can be found on the home page. He goes over using bushings.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #9 of 17 (permalink) Old 04-14-2015, 07:27 PM Thread Starter
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Thanks that makes more sense, I have a set of 50 bits from Amazon and I have a 1/2 inch, so I'll use that and the 3/4 guide that should do it I hope. Can I use any other bushing with the kit? I was reading on other threads that I can use the thread template guide adapter with other guides, and which one would be good with the bosch 1617?
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post #10 of 17 (permalink) Old 04-14-2015, 07:44 PM
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I use a pattern bit and no guide bushing. The bearing follows the jig. Guaranteed good fit if you used your workpiece to set the width.

Check out my post.

http://www.routerforums.com/jigs-fix...-dado-jig.html

Hope you find this info helpful.
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