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peter
 
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Default Routing a wood slab

Hi,
I have to cut / route a 135cm circle into a slab of wood, 4.5cm. I have
miniamal experience with routers. What sort of jig do I need to set up?
Peter


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Upscale
 
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"peter" wrote in message
I have to cut / route a 135cm circle into a slab of wood, 4.5cm. I have
miniamal experience with routers. What sort of jig do I need to set up?


A circle cutting jig. You could make your own out of plywood or buy one of
these. Take your choice. 4.5cm for the slab is almost two inches thick.
Options are finding a router bit that is 2" in length, route one side and
then turn the slab over, buy yourself a bit extender. Although I've heard of
bit extenders, I've never used one and can't advise you on how well they
work.

http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000


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peter
 
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"Upscale" wrote in message
...
"peter" wrote in message
I have to cut / route a 135cm circle into a slab of wood, 4.5cm. I have
miniamal experience with routers. What sort of jig do I need to set up?


A circle cutting jig. You could make your own out of plywood or buy one of
these. Take your choice. 4.5cm for the slab is almost two inches thick.
Options are finding a router bit that is 2" in length, route one side and
then turn the slab over, buy yourself a bit extender. Although I've heard
of
bit extenders, I've never used one and can't advise you on how well they
work.

http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000

Thanks so much.
I'll try and make something along the lines of the third option you offered.

Cheers and thanks again,

Peter pax


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Lobby Dosser
 
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"Upscale" wrote:

"peter" wrote in message
I have to cut / route a 135cm circle into a slab of wood, 4.5cm. I
have miniamal experience with routers. What sort of jig do I need to
set up?


A circle cutting jig. You could make your own out of plywood or buy
one of these. Take your choice. 4.5cm for the slab is almost two
inches thick. Options are finding a router bit that is 2" in length,
route one side and then turn the slab over, buy yourself a bit
extender. Although I've heard of bit extenders, I've never used one
and can't advise you on how well they work.


Though I have not used a bit extender, I don't think one would do any
good in this case. The bit extenders I've seen actually extend the Collet
for ease in bit changing in a router table or getting full use of the bit
with a fairly thick sub-base on a hand held machine. No matter the length
of the bit 'extender', the actual bit remains the same length and the
diameter of the collet of the extender is likely larger than the diameter
of the bit thus preventing extension of the bit into the stock to a depth
deeper than its length.


http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000



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You don't need a bit extender. You can buy a router bit that is long
enough. Freud makes them. I am sure others do, as well. Just be sure
that the length and plunge capabilities all work out so you can start
at zero and plunge to your final required depth (about 1 3/4"). The
Freud bit that is 2 1/2" long might stick out a bit, depending on your
router, so starting the circle might be a challenge.

Bob



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George
 
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"peter" wrote in message
u...


http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000

Thanks so much.
I'll try and make something along the lines of the third option you

offered.

Cheers and thanks again,

If you're speaking of "cutting" a circle rather than just routing a
blind-bottomed circular pattern into a slab, find a bandsaw and do it right,
with much less danger and effort. Circle-cutting jigs are pretty much the
same all over, so a search would turn up many.

If you're speaking of the groove, you might also consider following the edge
of a plywood template cut on that bandsaw and tacked to the middle. A nail
hole in end grain is going to close pretty nicely. A trammel hole not quite
as nice.


  #7   Report Post  
 
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You can also start your cut with the aforementioned jig, cutting mayby
1/4 or 3/8 deep, then rough cut at the OUTSIDE edge of the groove with
a bandsaw or saber saw, then use a top bearing pattern bit to finish
the edge in stages. Depends what tools and bits you have/are willing to
buy.

  #8   Report Post  
peter
 
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"George" wrote in message
...

"peter" wrote in message
u...


http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000

Thanks so much.
I'll try and make something along the lines of the third option you

offered.

Cheers and thanks again,

If you're speaking of "cutting" a circle rather than just routing a
blind-bottomed circular pattern into a slab, find a bandsaw and do it
right,
with much less danger and effort. Circle-cutting jigs are pretty much the
same all over, so a search would turn up many.

If you're speaking of the groove, you might also consider following the
edge
of a plywood template cut on that bandsaw and tacked to the middle. A
nail
hole in end grain is going to close pretty nicely. A trammel hole not
quite
as nice.

Thanks George.
The hole is to fit a new sink. I've never done anything like this before.
It should be beautiful when done. I hope.
The ply wood stencil is do-able, thanks.



  #9   Report Post  
Lobby Dosser
 
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Default

"peter" wrote:


"George" wrote in message
...

"peter" wrote in message
u...


http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000

Thanks so much.
I'll try and make something along the lines of the third option you

offered.

Cheers and thanks again,

If you're speaking of "cutting" a circle rather than just routing a
blind-bottomed circular pattern into a slab, find a bandsaw and do it
right,
with much less danger and effort. Circle-cutting jigs are pretty
much the same all over, so a search would turn up many.

If you're speaking of the groove, you might also consider following
the edge
of a plywood template cut on that bandsaw and tacked to the middle.
A nail
hole in end grain is going to close pretty nicely. A trammel hole
not quite
as nice.

Thanks George.
The hole is to fit a new sink. I've never done anything like this
before. It should be beautiful when done. I hope.
The ply wood stencil is do-able, thanks.


Assuming the body of the sink will overlap the edge of the hole, all you
need to do is draw the circle, drill a hole inside the circle near the
edge, and then cut out the circle with a jig saw. Unless you have a sink
unlike others I've owned, you don't need perfection.






  #10   Report Post  
peter
 
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"Lobby Dosser" wrote in message
news:3P3ue.11203$tG.6115@trnddc05...
"peter" wrote:


"George" wrote in message
...

"peter" wrote in message
u...


http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000

Thanks so much.
I'll try and make something along the lines of the third option you
offered.

Cheers and thanks again,

If you're speaking of "cutting" a circle rather than just routing a
blind-bottomed circular pattern into a slab, find a bandsaw and do it
right,
with much less danger and effort. Circle-cutting jigs are pretty
much the same all over, so a search would turn up many.

If you're speaking of the groove, you might also consider following
the edge
of a plywood template cut on that bandsaw and tacked to the middle.
A nail
hole in end grain is going to close pretty nicely. A trammel hole
not quite
as nice.

Thanks George.
The hole is to fit a new sink. I've never done anything like this
before. It should be beautiful when done. I hope.
The ply wood stencil is do-able, thanks.


Assuming the body of the sink will overlap the edge of the hole, all you
need to do is draw the circle, drill a hole inside the circle near the
edge, and then cut out the circle with a jig saw. Unless you have a sink
unlike others I've owned, you don't need perfection.

The slab of wood is a bit thick for jig sawing. About 4.5cm.
Could I plunge the power saw into the bottom side and cut / chisel out an
area under the sink hole area, and then ?? jig saw or ?? route the final top
hole?

Thanks for all the input.
Who would have thought that 'makers' would find the time to share thier
experience in a group on the net.





  #11   Report Post  
Lobby Dosser
 
Posts: n/a
Default

"peter" wrote:


"Lobby Dosser" wrote in message
news:3P3ue.11203$tG.6115@trnddc05...
"peter" wrote:


"George" wrote in message
...

"peter" wrote in message
u...


http://www.leevalley.com/wood/page.a...68&cat=1,43000
http://www.leevalley.com/wood/page.a...70&cat=1,43000
http://www.leevalley.com/wood/page.a...81&cat=1,43000

Thanks so much.
I'll try and make something along the lines of the third option
you
offered.

Cheers and thanks again,

If you're speaking of "cutting" a circle rather than just routing a
blind-bottomed circular pattern into a slab, find a bandsaw and do
it right,
with much less danger and effort. Circle-cutting jigs are pretty
much the same all over, so a search would turn up many.

If you're speaking of the groove, you might also consider following
the edge
of a plywood template cut on that bandsaw and tacked to the middle.
A nail
hole in end grain is going to close pretty nicely. A trammel hole
not quite
as nice.

Thanks George.
The hole is to fit a new sink. I've never done anything like this
before. It should be beautiful when done. I hope.
The ply wood stencil is do-able, thanks.


Assuming the body of the sink will overlap the edge of the hole, all
you need to do is draw the circle, drill a hole inside the circle
near the edge, and then cut out the circle with a jig saw. Unless you
have a sink unlike others I've owned, you don't need perfection.

The slab of wood is a bit thick for jig sawing. About 4.5cm.


I don't think we're talking the same tool. Common jigsaw blades are about
4 inches in length and you want to cut 4.5 centimeters which is about 1.8
inches.

Here are some examples:

http://www.boschtools.com/accessorie...tm?H=176309&G=
54783

Note the working length column. You'll see working lengths to about 5
inches.

Just in case we are talking different tools, here's a jig saw:

http://www.boschtools.com/tools/tool...981&G=54927&I=
55125

Hope this helps.

LD

Could I plunge the power saw into the bottom side and cut / chisel out
an area under the sink hole area, and then ?? jig saw or ?? route the
final top hole?

Thanks for all the input.
Who would have thought that 'makers' would find the time to share
thier experience in a group on the net.





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Lobby Dosser
 
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Default

Lobby Dosser wrote:

The slab of wood is a bit thick for jig sawing. About 4.5cm.


I don't think we're talking the same tool. Common jigsaw blades are
about 4 inches in length and you want to cut 4.5 centimeters which is
about 1.8 inches.

Here are some examples:

http://www.boschtools.com/accessorie....htm?H=176309&
G= 54783

Note the working length column. You'll see working lengths to about 5
inches.

Just in case we are talking different tools, here's a jig saw:

http://www.boschtools.com/tools/tool...981&G=54927&I=
55125

Hope this helps.

LD


While I'm thinking about it, here are a couple more tips:

1. Sinks usually come with a paper pattern for the cutout - the waste
bit. Cut out the pattern, tape it to the wood and draw a line round the
outside. Then cut to the inside of the line. You could also spray some
adhesive on the pattern, stick it to the wood and cut round it.

2. After you have cut a bit more than half the circle, make sure that the
underside of the cut portion has some support, such as a board across the
diameter clamped to the whole block. If the waste is not supported, you
risk the final inch or so breaking free rather than cutting free.

3. Please don't take offense at this, but if you let everyone know right
off What you are doing you are more likely to get to a better solution
quickly. There are several regulars here who do this for a living and
have waaay more experience than me. Something such as "I need to cut a
circular hole in 4.5cm stock for a sink, how do I do this?"

Good luck with the project and let us know how you do it and the results.

LD
  #13   Report Post  
peter
 
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Default


"Lobby Dosser" wrote in message
news:nq6ue.12004$tG.8265@trnddc05...
Lobby Dosser wrote:

The slab of wood is a bit thick for jig sawing. About 4.5cm.


I don't think we're talking the same tool. Common jigsaw blades are
about 4 inches in length and you want to cut 4.5 centimeters which is
about 1.8 inches.

Here are some examples:

http://www.boschtools.com/accessorie....htm?H=176309&
G= 54783

Note the working length column. You'll see working lengths to about 5
inches.

Just in case we are talking different tools, here's a jig saw:

http://www.boschtools.com/tools/tool...981&G=54927&I=
55125

Hope this helps.

LD


While I'm thinking about it, here are a couple more tips:

1. Sinks usually come with a paper pattern for the cutout - the waste
bit. Cut out the pattern, tape it to the wood and draw a line round the
outside. Then cut to the inside of the line. You could also spray some
adhesive on the pattern, stick it to the wood and cut round it.

2. After you have cut a bit more than half the circle, make sure that the
underside of the cut portion has some support, such as a board across the
diameter clamped to the whole block. If the waste is not supported, you
risk the final inch or so breaking free rather than cutting free.

3. Please don't take offense at this, but if you let everyone know right
off What you are doing you are more likely to get to a better solution
quickly. There are several regulars here who do this for a living and
have waaay more experience than me. Something such as "I need to cut a
circular hole in 4.5cm stock for a sink, how do I do this?"

Good luck with the project and let us know how you do it and the results.

LD

I feel really greatful for all your assistance and effort. Thanks also for
your patience.
I love working with wood, and appreciate the help I find in this group.
I will take more effort to detail my ideas.
In other groups, they are not as receptive.
I sometimes get flamed for not being the brightest.

This is a great group.

Peter pax


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Lobby Dosser
 
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"peter" wrote:

I sometimes get flamed for not being the brightest.


I been flamed so much it's a wonder there's any fuel left anywhere.


This is a great group.


Got that right!!




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