Who uses this spiral router bit? - AVS | Home Theater Discussions And Reviews
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post #1 of 22 Old 08-20-2014, 03:25 PM - Thread Starter
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Who uses this spiral router bit?

ive been told to get a 1/2 spiral bit but all i can find is 1/4. is this bit good for cutting circles? i have a jasper jig pro 200 and 3hp porter cable router


http://www.homedepot.com/p/Diablo-1-...1&str_nbr=1777
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post #2 of 22 Old 08-20-2014, 03:30 PM
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Quote:
Originally Posted by Black Cat 13 View Post
ive been told to get a 1/2 spiral bit but all i can find is 1/4. is this bit good for cutting circles? i have a jasper jig pro 200 and 3hp porter cable router


http://www.homedepot.com/p/Diablo-1-...1&str_nbr=1777
I even prefer the 1/4 " !! ..but I also prefer a (Down-Spiral) , keeps dust in groove and helps cutout stay put till cutout is finished.
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post #3 of 22 Old 08-20-2014, 03:36 PM - Thread Starter
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Originally Posted by randyc1 View Post
I even prefer the 1/4 " !! ..but I also prefer a (Down-Spiral) , keeps dust in groove and helps cutout stay put till cutout is finished.
wow. your the first to ever recommend a downward cut. are they they same price? im stoked on my first bass horn build. im going with the keyestone design
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post #4 of 22 Old 08-20-2014, 04:09 PM
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Quote:
Originally Posted by Black Cat 13 View Post
ive been told to get a 1/2 spiral bit but all i can find is 1/4. is this bit good for cutting circles? i have a jasper jig pro 200 and 3hp porter cable router


http://www.homedepot.com/p/Diablo-1-...1&str_nbr=1777

It probably depends on your router. I have a 3.5 hp router and I use a 1/2" spiral up-cut. Goes through MDF and plywood like butter. In 3/4" MDF I could cut a circle with one pass, but I do use two passes.

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post #5 of 22 Old 08-20-2014, 04:44 PM
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Originally Posted by Black Cat 13 View Post
ive been told to get a 1/2 spiral bit but all i can find is 1/4.
You must be looking in the wrong places. A 1/4 bit will heat up very quickly and give you burned cuts. Whiteside Router Bits is a good source.

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post #6 of 22 Old 08-20-2014, 05:00 PM
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Quote:
Originally Posted by Black Cat 13 View Post
ive been told to get a 1/2 spiral bit but all i can find is 1/4. is this bit good for cutting circles? i have a jasper jig pro 200 and 3hp porter cable router


http://www.homedepot.com/p/Diablo-1-...1&str_nbr=1777
Quote:
Originally Posted by Bill Fitzmaurice View Post
You must be looking in the wrong places. A 1/4 bit will heat up very quickly and give you burned cuts. Whiteside Router Bits is a good source.
Maybe it is easier ,.. never tried the 1/2" , I just thought the 1/4" would be a little easier to push through.
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post #7 of 22 Old 08-20-2014, 05:12 PM - Thread Starter
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Originally Posted by AV Science Sales 5 View Post
It probably depends on your router. I have a 3.5 hp router and I use a 1/2" spiral up-cut. Goes through MDF and plywood like butter. In 3/4" MDF I could cut a circle with one pass, but I do use two passes.

you provide a link for 1/2 spiral upcut. thanx
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post #8 of 22 Old 08-20-2014, 05:12 PM - Thread Starter
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post #9 of 22 Old 08-20-2014, 05:23 PM
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The Jasper 240 jig I have is calibrated for 1/4" bits. If you used a 1/2" bit you would need to adjust the cut diameter on the jig to compensate.

Most recommendations I've seen are to use an up-cut bit for most work, but a down-cut bit for anything veneered, to prevent tearout of the veneer.
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post #10 of 22 Old 08-20-2014, 05:29 PM
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Quote:
Originally Posted by rhodesj View Post
The Jasper 240 jig I have is calibrated for 1/4" bits. If you used a 1/2" bit you would need to adjust the cut diameter on the jig to compensate.

Most recommendations I've seen are to use an up-cut bit for most work, but a down-cut bit for anything veneered, to prevent tearout of the veneer.
Agreed...the Jasper Jig definitely calls for the 1/4" bit.
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post #11 of 22 Old 08-20-2014, 05:41 PM
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Quote:
Originally Posted by Black Cat 13 View Post
you provide a link for 1/2 spiral upcut. thanx
I use a Whiteside RU5100. It has 1" of cutting length. You can buy at several places.
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post #12 of 22 Old 08-20-2014, 11:19 PM - Thread Starter
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DAMN... i dont think my router is compatible with the jasper jig 200 pro. i have porter cable 8931 plunge base. kinda hard to determine what is compatible on the jasper website. i did see this... wonder if i fit in the category PC8902/8931
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post #13 of 22 Old 08-21-2014, 07:42 AM
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You want to use a "up spiral" bit, so that it removes the material from the cut. If you use a down spiral it will leave all the dust in the cut and make it wear faster, since you will recutting everything you already did.

A 1/4" bit will work fine for what you need. I've cut over 30 holes with mine and there is no signs of hear stress, burned cuts, or wear. It looks like it's new, and it's still as sharp as it was when I got it. I did my cuts in 3/4" MDF with three passes. Yes I could have done it in one, but I just cut a little at a time and I let the tool do the work, don't force it. Plus the jasper jig is set up for a 1/4" bit.

If your router doesn't line up with the jasper hole patterns, just drill your own holes. There is screws on your router base plate that you can use as a template.
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post #14 of 22 Old 08-21-2014, 09:11 AM
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You guys with over 3hp handheld routers are bigger men than I. I've done it and find it's hard to hang onto if it hits a blemish.


Whiteside is always my first stop for router bits. They make great bits and their customer service is second to none.
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post #15 of 22 Old 08-21-2014, 01:26 PM
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Got a local Rockler or Woodcraft store? They typically have Whiteside bits on the rack.

Like a lot of the other folks here, I use Whiteside's 1/4" solid carbide upcut spiral bits with my Jasper Jig, I made a LOT of speakers before I dulled the first one (most of my work is not MDF though). Cutting through a drywall screw is what did it in. I cut enough circles to where I have a router dedicated to the Jasper Jig.

You can also wave the bits in from Amazon.
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post #16 of 22 Old 08-21-2014, 01:47 PM
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I've had really good experiences buying my bits from Hartville Tool. Fast free shipping and if you spend $50 you get free furniture plans.
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post #17 of 22 Old 08-21-2014, 07:00 PM
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Originally Posted by Black Cat 13 View Post
you provide a link for 1/2 spiral upcut. thanx
http://www.mlcswoodworking.com/shops...ghlight=up+cut
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post #18 of 22 Old 08-22-2014, 01:38 AM - Thread Starter
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ok... i bought a fued diablo 1/4 upcut spiral bit at home depot. this was just for testing. very impressed! it took 2 passes to cut through 3/4" baltic birch ply. zero burns and a perfect circle. my only complaint is with the jasper jig. it tends to lift a little during the cutting. i couldnt find the rods that come with the jasper jig pro 200. used the drill bit to hold the jig down. any suggestions on keep the jig down during cutting? over-all... this rig is very solid. very impressed with the porter cable router. very smooth!
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post #19 of 22 Old 08-22-2014, 09:42 PM - Thread Starter
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anybody?
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post #20 of 22 Old 08-23-2014, 09:22 AM
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Quote:
Originally Posted by Black Cat 13 View Post
anybody?
Try using a larger diameter bit, one that fits snugly into the jasper jig. The little piece that comes with the jig fits pretty tight.
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post #21 of 22 Old 08-23-2014, 04:30 PM
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post #22 of 22 Old 08-24-2014, 07:46 AM
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Quote:
Originally Posted by Black Cat 13 View Post
very impressed! it took 2 passes to cut through 3/4" baltic birch ply. zero burns and a perfect circle.
3/8" per pass is a little much. If you want the bit to last take 1/4"or less per pass
Quote:
my only complaint is with the jasper jig. it tends to lift a little during the cutting
My guess is it's riding up on the pin because you're pulling the router too fast.
Quote:
i couldnt find the rods that come with the jasper jig pro 200
They're 1/8" stainless steel machinist pins. You can buy lengths of 1/8" SS rod and make your own pins. Look on Amazon or eBay for the rods
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