Seeking Advice First Router Project - Page 3 - Router Forums
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post #21 of 68 (permalink) Old 01-22-2018, 11:03 AM
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Thanks for advice makes sense! Recess only needs to be like 4mm so assuming if I keep the thickness of template under say 6-7mm should be ok for most decent routers?



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Yes...should be...keep in mind that you will also need to select the right bit, for example, in your case a flush trim bit of the right length would work...a straight bit, no bearing, but then your template would need to use the router base as a guide...a rabetting bit will also work...

The size and shape of the template will be important...it needs to be sized appropriately to allow support of the router on the box (base) even though only part of the router base will have support.

The intent is to create as much support for the router as you can...select the method of template that provides that.

Since you are new to routing, I suggest you make LOTS of practice cuts on different types of wood...the router and bit combination will behave differently for different woods and you don't want to be surprised by how it will feel on bamboo.

Note also that bamboo will tend to splinter due to it's stringy fiber grain. Be careful as you transition from end grain to long grain (it appears the bowl has both...)

...and do not try to make complete cuts...small bites...like eating an elephant (small bite at a time) Use your bit height adjustment to take vertical bites into your profile rather than trying to accommodate a horizontal cut. You will likely use two templates...one for cleaning the bottom hole after rough cut and then another for creating your recess...alignment of each will be important...

Ask away...lots of folks here that will help...
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post #22 of 68 (permalink) Old 01-22-2018, 11:30 AM
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OK, I'll add my 2 cents to all the other great comments. Since you are joining two bowls together (I presume) to form the sphere, you will be working on one bowl that will house your speaker. Have you considered creating the hole with a band saw first. Once you cut the bottom off the bowl, you could then consider creating your rabbet with a router/template or any other method you choose. That will allow the bowl to sit on it's flat side, held securely by clamps or otherwise and not have to worry about the bowl rolling or rocking. Once you've got the hole/rabbet created for the speaker, then you could join the two bowls together to form the sphere.
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post #23 of 68 (permalink) Old 01-22-2018, 12:43 PM
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I do now

Thanks nick?


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You are on the right path here, might consider after you get the large hole cut to use a Rabet bit with an 1/8" smaller bearing to cut the rabet around the hole. By removing the bushing it will give the bearing clearance to make the cut. I like the Box Idea with the top the template for routing the large hole.

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post #24 of 68 (permalink) Old 01-22-2018, 02:15 PM Thread Starter
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OK, I'll add my 2 cents to all the other great comments. Since you are joining two bowls together (I presume) to form the sphere, you will be working on one bowl that will house your speaker. Have you considered creating the hole with a band saw first. Once you cut the bottom off the bowl, you could then consider creating your rabbet with a router/template or any other method you choose. That will allow the bowl to sit on it's flat side, held securely by clamps or otherwise and not have to worry about the bowl rolling or rocking. Once you've got the hole/rabbet created for the speaker, then you could join the two bowls together to form the sphere.


Hi Vchiatelli

The hole cuts will be made before they are joined.
The problem Iím trying to solve is how to keep a Router perfectly level as are moving it around given u donít have a level flat surface for the router



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post #25 of 68 (permalink) Old 01-22-2018, 03:08 PM
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The box + flat top solves a whole bunch of issues. Your rebated circle will have it's wall dead perpendicular, and the rim where the speaker sits will be in a perfectly flat plane, perpendicular to the wall of the rebate; more than that you couldn't ask for.
If you haven't bought a router yet, you need a Bosch 1617EVSPK kit!!!
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post #26 of 68 (permalink) Old 01-22-2018, 03:18 PM
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From looking at the finished product, and what it might take to accomplish the result, I think I would probably screw it up! Better buy a couple of those bowls.

It might be possible to do with a CNC, but even then it would take some careful measuring, clamping (UGH!) and getting the piece exactly centered. So, I think I would probably screw it up! Better buy a couple of those bowls.

That's my story and I'm stickin' to it!
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post #27 of 68 (permalink) Old 01-22-2018, 03:45 PM Thread Starter
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The box + flat top solves a whole bunch of issues. Your rebated circle will have it's wall dead perpendicular, and the rim where the speaker sits will be in a perfectly flat plane, perpendicular to the wall of the rebate; more than that you couldn't ask for.

If you haven't bought a router yet, you need a Bosch 1617EVSPK kit!!!


Hey DaninVan,
Iíve been looking at dual routers to give me some flexibility which I assume will help as I donít have a dedicated router table.

The Bosch looks the goods unfortunately down under we have limited options and Bosch donít range a 240v for oz.


Seemingly the only dual routers I can find are Dewalt D26204K-XE and Triton (MOF001) never used any of their products so donít know what they are like.

Makita you can also buy a smaller 700w and buy the plunge base separately almost works out same price as the Dewalt and Triton though which are 900 and 1400w if I recall


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post #28 of 68 (permalink) Old 01-22-2018, 03:56 PM
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Down Under?! See? This is why we really encourage folks to fill out their profiles! Your current one says you're in the US, by default.
There are a few Ozzie members; maybe they can help you out.
By the way, Amazon is pending in Oz.
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post #29 of 68 (permalink) Old 01-22-2018, 08:43 PM
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An interesting project.

If the bowls are relatively cheap I would try the following:

1) With either hot glue or good double sided tape I would afix the bowl to a reasonably sized piece of 1/4" Baltic birch.
2) Use a drill press and hole saw to cut the large circle through both the bowl and the Birch piece
3) Use a rabbet bit with a bearing or bushing to route the recess while the bowl sits on its "larger" end for stability. Use a quality trim router for the project. If you have problems locating a router, contact the "locals" as Dan advised.

Thus be my 1 cents worth in deference to Vince.
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post #30 of 68 (permalink) Old 01-22-2018, 11:09 PM
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Jon; minor edit (I think). The smaller inside diameter needs to be removed first to allow the rebate to expand to the larger outer diameter. ie the opening for the outer edge of the speaker is the final dimension.
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