Flat Router Bit

[dyazdani]

Is this a suitable bit for cutting the driver recesses? Just want to be sure before I pay for something I don't need.

In addition, I will be ordering a 1/4" spiral upcut, a good sized flush trim, a 3/4" roundover, and a 45 deg. chamfer bit.

Thanks!

[ThomasW]

Yep, I cut recesses for big drivers with a 3/4" flat bottom..

[Paul H]

Agreed, and go with 1/2" shafts wherever you can.

The larger the better for flush trim bits for speaker building. A small bit can be used to trim veneer, but if you're using it to cut extra mdf or ply flush to another surface, bigger is better (ie 1/2" shaft and cutter, 2" long cutter).

Paul

[dyazdani]

Thanks, I just wanted to be sure since they don't call it a "flat bottom bit" rather a "straight plunge cutter."

I'm planning on a 2" flush trim for sure, maybe a smaller one for more delicate work too. For now, I just need it to trim MDF on cabinets.

I plan to get 1/2 bits for everything except the 1/4" upcut, they supply a 1/2", but it's really a 1/4" bit with an adaptor, according to the website.

Thanks for the help.

[dawaro]

If you are using a circle jig like the Jasper you will also want to make sure you get the correct size bit for it. They are all calibrated to certain bit sizes. The smaller model jigs do not allow clearence for larger bits.

[PMazz]

I always use a template to route my finished baffles and use the #7684 bit.

http://mlcswoodworking.com/shopsite_sc/store/html/smarthtml/pages/bt_dado.html

Pete

[ThomasW]

Oh sure Pete be different just because you're the only professional woodworker posting to this thread......:wink:

[dyazdani]

The jasper jig is calibrated for a 1/4" bit IIRC, but you can use a different size, you just have to account for it when you set up the jig. It gives good instructions on how to do so, but it's not really rocket science anyway.

[ThomasW]

Using a 1/4" bit, all but the largest the Jasper jig is indexed for 1/8" adjustments.

[dyazdani]

I have both sizes of the Jasper Jig, according to the scales, both are in 1/16" increments. Did they change them from 1/8"?

The smaller jig (up to 7 1/2") will be limited to the bit diameter. The large jig should have no problem.

Pete,

I plan to use templates in the future when doing some of my own designs. For my sub project, I'll stick with the jasper jig for my 15" plus recess. I did see that bit previously though and made a mental note.

[ThomasW]

Did they change them from 1/8"?

My bad, operator error, posting before AM coffee .... ops:

[dyazdani]

My bad, operator error, posting before AM coffee .... ops:

:lol: I didn't want to call you out since you are "the man"

[ThomasW]

I didn't want to call you out since you are "the man"

Actually only 1/2 "the man" before the AM caffeine kicks in.. :B

[PMazz]

Oh sure Pete be different just because you're the only professional woodworker posting to this thread......:wink:

Just tryin to help out however little I can. Besides, I've always been "different".

Pete

[dyazdani]

Got my bits in from MLCS today! Just in time to practice this weekend...

Image not available

[ThomasW]

Two words .......dust mask.....:wink:

[ekkoville]

Pardon my ignorance, but is that THE Jasper jig or another model?

[ThomasW]

That's the Jasper model #200, it's the most popular. They make several other models.

[dyazdani]

That's the Jasper model #200, it's the most popular. They make several other models.

Yep, I've got the 400 as well, does up to a 7.5" circle. I have no need for it at the time, but PE offers a combo at a fairly attractive price.

[ekkoville]

So there must be a pin of sorts that goes in the center of your planned circle to cut around?

[ThomasW]

A 1/8" machinest's pin is the pivot point.

[wildfire99]

Am I the only one who cuts recesses with the 1/4" upcut bit and a jasper jig in multiple passes? It takes a few minutes more but I've never miscut for width (which I did with the plunge cutting bit), and I don't have to think about it.

[dyazdani]

I do the outermost with a 1/4" upcut and then plow out a wider recess with the flat bit. Then I go back to the upcut bit to cut out the middle.