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9th October 2014, 10:30 AM #1
Bit Selection For Dado's? How to...?
Hi everyone.
I'm currently updating my router and looking at what size bits to use for Dado's amongst other things when using on MDF and Pine etc..
If we set this thread up for the "Standard" for those who are also looking then this will help more than just me.
If we want a good fit using 12mm stock in the Dado - what size is best 12mm or 12.5mm? Are there any "rules"?
Same again in 16mm and Impreial sized wood stock.
Please post here
Thanks everyone for your experiance and knowlege to share here.
"Man Caves NZ rock"
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9th October 2014, 01:42 PM #2
I would suggest spiral upcuts for both. You'll get really great clean cuts. I would buy 1/2 in h shanks as well, particularly for the 16m. A router that takes half inch shanks is more flexible anyway. You can buy collets for 1/4" 8mm and 12mm shank bits.
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9th October 2014, 08:37 PM #3
Also measure. Just because the board says '16mm' don't assume it actually is 16mm OR that you can make a perfect straight cut without any wobble in the non-guided side. Corollary - if you hold the router real hard up against a guide to stop wobble, don't assume the guide won't deflect under pressure. Don't ask how I know this...
Also (if you are going to do this regularly) consider making a captive guide (gives two guide edges for the router) and use an undersize bit (ie if cutting 16mm wide, do it with a 10mm bit, with one pass along each side and 4mm of crossover in the middle)
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10th October 2014, 12:47 PM #4GOLD MEMBER
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Not sure if this will help you out, but, it may give you another idea. Instead of trying to match bit size to timber sizes this jig allows me to get exact matches. I use straight bits and will certainly get spirals when I finally exhaust the old ones.
https://www.woodworkforums.com/f44/ugly-34437
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11th October 2014, 09:59 AM #5
Upper cuts...
Thanks. Question "H" Shank?
Like the Linbide SC12.7M8UC ? - Up cut prevents burning in plunge cuts. Requires good vacuum. Suitable for slotting, grooving.
They (Linbide) dont seem to have too many sizes avail - so may need to look elsewear?
On the Linbide site I can see compression routers with upcut and downcut. 12.7M4CC for example - these sound good?
"Fitted with sub-micron grade tungsten, they are designed to be easily sharpened with out using expensive spiral grinders. Compression routers are just the tool for double-sided laminate boards like Formica and Melamine, plastic coated boards, hardwood or veneered plywood where a clean cut is needed on both top and bottom surfaces. The Linbide Compression Router Bit makes clean, chip and splinter-free cuts for truly excellent finish in materials 10mm to 20mm."
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11th October 2014, 10:12 AM #6
Timber Sizes...
Hi MS
True - Measure "Stock" First.
"Saftey is always needed when using power tools" - A router at speed which looses its line can be dangerous and destructive so consider a table or Hold Downs wherever and whatever you do. Tons of "Jigs" are easily sort here and other places on the internet.
Re Captive guides. I'm using a Triton Table saw bench with a sliding router frame. So this will fix that issue, however for more "portable" work a Jig is easy to "knock up".
Consider Multi cuts.
Yes - with regular work and saving the tooling it is and idea. What about "Slotting"...?
Thanks
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11th October 2014, 10:22 AM #7
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11th October 2014, 10:44 AM #8
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