Routing a dado down the center - Router Forums
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post #1 of 14 (permalink) Old 09-16-2004, 09:03 AM Thread Starter
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Default Routing a dado down the center

When using a table saw it is possible to center a dado down the edge of a piece of timber by running the timber from both sides. Can the same technique be used for a router? What are the implications for spin of the router and cutting on the right face of the cutter?

If this is not possible, what is the best method to ensure that the dado is centered?

Thanks in advance.

Garry
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post #2 of 14 (permalink) Old 09-16-2004, 09:22 PM
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Quote:
Originally Posted by garryjc
When using a table saw it is possible to center a dado down the edge of a piece of timber by running the timber from both sides. Can the same technique be used for a router? What are the implications for spin of the router and cutting on the right face of the cutter?

If this is not possible, what is the best method to ensure that the dado is centered?

Thanks in advance.

Garry
When making your dado with the tablesaw is width of the dado made correct or off a bit?

My thoughts,

1) The problem with using the router is the rotation of the router bit and staying on the cutting side of the bit with the second pass. 2) Cutting twice gets the dado in the center all right but the size may be off.

What I would like to do is measure and mark the center then cut both sides from one end either the top or bottom using same set up. They might not be prefect center but both are the same and dado width is cut to spec.

Just my two cents, any other thoughts.

Rick and Bob
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post #3 of 14 (permalink) Old 09-16-2004, 11:03 PM
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Quote:
Originally Posted by BobandRick
When making your dado with the tablesaw is width of the dado made correct or off a bit?

My thoughts,

1) The problem with using the router is the rotation of the router bit and staying on the cutting side of the bit with the second pass. 2) Cutting twice gets the dado in the center all right but the size may be off.

What I would like to do is measure and mark the center then cut both sides from one end either the top or bottom using same set up. They might not be prefect center but both are the same and dado width is cut to spec.

Just my two cents, any other thoughts.
This is my two cents, I have used the "Norm" method on the table saw but have never tried it on the router. As you no doubt know you cut the dado first then cut what ever fits into it to match.

If you want to try it with a router please see the attached sketch as an example of what BobandRick are talking about and the problem of making sure the wood is not trapped between the bit and fence.

I hope this sketch is clear enough to read and please don't try this at home and blame me if something goes wrong.........

Ed
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post #4 of 14 (permalink) Old 09-17-2004, 08:57 AM
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Cool, Ed.... that makes sense. Thanks.
~Julie~
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post #5 of 14 (permalink) Old 09-17-2004, 08:30 PM
 
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As dado blades can not be fitted to any table saw made or sold in Europe in the last few years the only way to make a dado (trench or housing) is with a router.
What I've never had I don't miss.
All table saws sold in Europe must have a shorter arbor so dado blades can't be fitted and have an electrical brake which could cause a dado set to unscrew and fly off.
At the start of the year commercial workshops had to stop using the saws capable of taking these blades to comply with the HSE (Health and Safety Excecutive)
This entailed getting rid of perfectly good machines and replacing them with new ones.
Dado blades can be used in a radial arm saw but not a table saw.
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post #6 of 14 (permalink) Old 09-17-2004, 09:25 PM
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Quote:
Originally Posted by Dewy
As dado blades can not be fitted to any table saw made or sold in Europe in the last few years the only way to make a dado (trench or housing) is with a router.
What I've never had I don't miss.
All table saws sold in Europe must have a shorter arbor so dado blades can't be fitted and have an electrical brake which could cause a dado set to unscrew and fly off.
At the start of the year commercial workshops had to stop using the saws capable of taking these blades to comply with the HSE (Health and Safety Excecutive)
This entailed getting rid of perfectly good machines and replacing them with new ones.
Dado blades can be used in a radial arm saw but not a table saw.
Is this for real?????

I guess I can believe it as once we had to replace all the 4 legged stools with 5 legged ones because people were tipping off them or some such idea.

Ed
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post #7 of 14 (permalink) Old 09-19-2004, 06:46 PM
 
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Originally Posted by reible
Is this for real?????

Ed
Perfectly real.
Dado blades can be bought from most suppliers but can only fit on pre '98 table saws or radial arm saws.
Commercial workshops that had always used them had to replace their table saws with ones having a short arbor and electric braking.
It was a matter of amateurs having accidents because they had no idea of the safety rules and commercial users paying the price for others mistakes.
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post #8 of 14 (permalink) Old 09-19-2004, 07:41 PM
 
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Quote:
Originally Posted by reible
Is this for real?????

I guess I can believe it as once we had to replace all the 4 legged stools with 5 legged ones because people were tipping off them or some such idea.

Ed
Instead of increasing the number of legs on the stools perhaps they should have decreased the number of drinks during happy hour.
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post #9 of 14 (permalink) Old 09-19-2004, 07:43 PM
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Quote:
Originally Posted by reible
Is this for real?????

I guess I can believe it as once we had to replace all the 4 legged stools with 5 legged ones because people were tipping off them or some such idea.

Ed
Now they tip off of them in five different directions instead of four. lol
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post #10 of 14 (permalink) Old 09-19-2004, 07:47 PM
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This is a little off subject but as you might know we are still on the inch standard thus plywood is 1/4", 1/2", 3/4" in sheets of 4' x 8' and dimensioned lumber is 1x 2, 1x 4 (actual sizes for a 1 x 4 is x 3 ). What type of stand wood sizes do you have in the UK?

Also thinks like routers have and collets, Im guessing that is all different as well?

Ed

Ed
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