Jasper Model 274 Random Noob Questions - Router Forums
 
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post #1 of 4 (permalink) Old 03-05-2011, 10:49 AM Thread Starter
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Default Jasper Model 274 Random Noob Questions

Hello all,
I’m new to this forum and woodworking in general so I hope my questions aren’t too vague. If you need more info please ask.

These questions could be in a couple of different forum categories so I hope I’m in the correct one.

I just bought a Craftsman 17543 router from Sears and will be using it to create speaker spacer rings for some new car audio speakers. I also just ordered a Jasper Model 274 combo kit that is on the way.

Here’s some info about the project. These rings will need to have an O.D. of 7 11/16” (to fit into the space on the inner door panel) and an I.D. of 5 ¾” (so the speaker will drop into the ring). These spacer rings are used to push the new speakers outward to clear the door glass. I’ll be using ¾” MDF for these rings. I’ll actually be gluing two of these rings together to create a 1½” thick spacer ring.

Ok, here come the questions. The downloaded Jasper manual states to use a ¼” router bit.

Is that the shank dia. and the cutter dia.?

I found this router bit on the web and it appears to be what I need:

Freud 04-108 Straight Router Bit, Carb. Ht.1", OD 1/4"
Shank...1/4" Overall Diameter- 1/4" Carbide Height...1" Overall Length...2-1/2"

When using a router bit do I attempt to cut the entire ¾” MDF thickness in one pass or should I do it with two or more passes?

I’ll also need to coat the MDF with something to inhibit moisture since these rings will be inside the door panel. I live in the Pacific Northwest so moisture is an issue. I’m thinking of using varnish but I’m open to suggestions.

Is there another wood that I could use that would work well for this application?

Thanks in advance for any advice!
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post #2 of 4 (permalink) Old 03-05-2011, 11:27 AM
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Quote:
Originally Posted by nwsalmon View Post
Hello all,
I’m new to this forum and woodworking in general so I hope my questions aren’t too vague. If you need more info please ask.

These questions could be in a couple of different forum categories so I hope I’m in the correct one.

I just bought a Craftsman 17543 router from Sears and will be using it to create speaker spacer rings for some new car audio speakers. I also just ordered a Jasper Model 274 combo kit that is on the way.

Here’s some info about the project. These rings will need to have an O.D. of 7 11/16” (to fit into the space on the inner door panel) and an I.D. of 5 ¾” (so the speaker will drop into the ring). These spacer rings are used to push the new speakers outward to clear the door glass. I’ll be using ¾” MDF for these rings. I’ll actually be gluing two of these rings together to create a 1½” thick spacer ring.

Ok, here come the questions. The downloaded Jasper manual states to use a ¼” router bit.

Is that the shank dia. and the cutter dia.?

I found this router bit on the web and it appears to be what I need:

Freud 04-108 Straight Router Bit, Carb. Ht.1", OD 1/4"
Shank...1/4" Overall Diameter- 1/4" Carbide Height...1" Overall Length...2-1/2"

When using a router bit do I attempt to cut the entire ¾” MDF thickness in one pass or should I do it with two or more passes?

I’ll also need to coat the MDF with something to inhibit moisture since these rings will be inside the door panel. I live in the Pacific Northwest so moisture is an issue. I’m thinking of using varnish but I’m open to suggestions.

Is there another wood that I could use that would work well for this application?

Thanks in advance for any advice!
Hi Carter - Welcome to the forum
That bit will work but you cannot plunge, ie dive straight into the face of the stock, with it. It will need to start the cut off the edge of the stock. More expensive but will plunge is a spiral bit, MLCS solid carbide router bits. Spiral bit has cutting edges along the bottom allowing it to cut straight into the stock. The straight bit you referred to does not. There are some straight bits with a cutting edge on the bottom but I was unable to quickly locate one in 1/4" size. Possibly a search of higher end bit distributors such as tools today or eagle america will find one.
Cutting depth - No, I wouldn't recommend taking the full 3/4" in one pass. The deepest I would go with a 1/4" bit would be 3/16" and that's pushing it, 1/8" is recommended.
For finish I would go with boiled linseed oil. Urethane may also be an option.
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post #3 of 4 (permalink) Old 03-05-2011, 11:28 AM
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Hi Carter


The Jasper will come setup for the 1/4" bit ( shank and cutting diam.) But once you get it I suggest you drill the hole out to 3/4" ID diam. or 1" diam. so you can use the brass guides with your Craftsman router and the Jasper..
This will let you use the bigger bits plus the cord will not wind up around the router , plus you will not need to screw the Jasper to your router when you want to use your Jasper..just drop the guide in the hole and cut out ring or hole with a 1/4",3/8" or 1/2" bit.

9 Piece Router Template Guide Set

Note,, very easy to drill it out on dead center,, chuck up a 1/4" drill bit in the drill press push the bit down in the hole, lock the Jasper to the top with some plywood scrap under it, now chuck up a 3/4" bit and drill it out..

Note====the 3/4" brass guides are a bit to long to use it on the Jasper you will need to grind/cut it down to 1/4" long stem in order to use it in the Jasper..but that's not a big deal..

Here's a very easy jig you can make if you want to cut it off on the band saw..
http://www.routerforums.com/jigs-fix...ss-guides.html

=======
=========

Quote:
Originally Posted by nwsalmon View Post
Hello all,
I’m new to this forum and woodworking in general so I hope my questions aren’t too vague. If you need more info please ask.

These questions could be in a couple of different forum categories so I hope I’m in the correct one.

I just bought a Craftsman 17543 router from Sears and will be using it to create speaker spacer rings for some new car audio speakers. I also just ordered a Jasper Model 274 combo kit that is on the way.

Here’s some info about the project. These rings will need to have an O.D. of 7 11/16” (to fit into the space on the inner door panel) and an I.D. of 5 ¾” (so the speaker will drop into the ring). These spacer rings are used to push the new speakers outward to clear the door glass. I’ll be using ¾” MDF for these rings. I’ll actually be gluing two of these rings together to create a 1½” thick spacer ring.

Ok, here come the questions. The downloaded Jasper manual states to use a ¼” router bit.

Is that the shank dia. and the cutter dia.?

I found this router bit on the web and it appears to be what I need:

Freud 04-108 Straight Router Bit, Carb. Ht.1", OD 1/4"
Shank...1/4" Overall Diameter- 1/4" Carbide Height...1" Overall Length...2-1/2"

When using a router bit do I attempt to cut the entire ¾” MDF thickness in one pass or should I do it with two or more passes?

I’ll also need to coat the MDF with something to inhibit moisture since these rings will be inside the door panel. I live in the Pacific Northwest so moisture is an issue. I’m thinking of using varnish but I’m open to suggestions.

Is there another wood that I could use that would work well for this application?

Thanks in advance for any advice!


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Last edited by bobj3; 03-05-2011 at 11:41 AM.
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post #4 of 4 (permalink) Old 03-06-2011, 10:00 AM Thread Starter
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Default Thanks for the advice!

Hello all and thanks for the advice. It looks like I'll be creating a new shopping list.

I went to the MLCS site (thanks for the link) and bought three spiral bits so that should get me started.

I spent a couple of hours roaming that site and learned a lot about bits in general. They have a lot of good info to read. After perusing the site I see a lot of projects I could do around the house too.

Thanks again and it looks like I'll be spending some quality time on this site.

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