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Old 09-25-2015, 09:33 AM   #1
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Which router and bit?


I need a recommendation on what type of router and bit I need to create an edge matching the attached image. The cut is the same on top and bottom of the edge. I'm working with poplar. I normally buy the best tools available, but in this case I really just need it to do a couple of sills, so don't want to spend more than is necessary to do a good job on these few sills.

Also, the sills pictured have been sitting in an air-conditioned space for a few years. Before I paint, I guess I may need to sand. I have a palm sander, and a random orbital sander, but would hand sanding with a fine grain sand paper work best?

Thanks for any help,
Bob

Which router and bit?-windowsilledge.jpg
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Old 09-25-2015, 10:01 AM   #2
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best tool for that job is a table mounted router, and guessing a 3/4" cove bit. that diameter appears greater than the 3/8" that it is cut in. router could be hand held if board is clamped securely.

palm sander with 150 will be fine.

Last edited by TimPa; 09-25-2015 at 10:03 AM.
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Old 09-25-2015, 05:42 PM   #3
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Box core bit with bottom bearing
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Old 09-25-2015, 06:07 PM   #4
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A cove bit is what you need as 1st poster said, core box won't cut that profile, as to size pretty hard to say from looking at the pic, but use a 1/2 " shank bit for sure.
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Old 09-25-2015, 06:30 PM   #5
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Multiple passes with the cove bit.
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Old 09-25-2015, 08:59 PM   #6
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Obviously a cove bit, with multiple thin passes given that poplar sometimes chips and or aplinters...but that said, to the orig poster, next time you have a similar issue, Google "router bit profiles" and you will get charts with virtually every router bit in existence along with a profile of the cut that it makes. Ron
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Old 09-26-2015, 11:53 AM   #7
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Thank you for your responses (and thanks for the search term and multi-pass advice ront2769). TimPA mentions a table router, which sounds like the best way, but probably not cost efficient for what I want to do. Could something along the lines of a trim router handle this? If so, are there accessories that I should get (i.e., edge guide, etc.)? And, most importantly, is this a job that a novice should take on? I'm very mechanical and renovated my entire house mostly on my own with help from here and other sources, but am I taking on more trouble than necessary for just a sill or two?

Last edited by Bob...; 09-26-2015 at 11:55 AM.
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Old 09-26-2015, 12:14 PM   #8
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Quote:
Originally Posted by Bob... View Post
Thank you for your responses (and thanks for the search term and multi-pass advice ront2769). TimPA mentions a table router, which sounds like the best way, but probably not cost efficient for what I want to do. Could something along the lines of a trim router handle this? If so, are there accessories that I should get (i.e., edge guide, etc.)? And, most importantly, is this a job that a novice should take on? I'm very mechanical and renovated my entire house mostly on my own with help from here and other sources, but am I taking on more trouble than necessary for just a sill or two?

Lowes has a skill 1.75hp router w/ 1/2" collet for under $70 that's ideal for a few sills. You need a larger base than a trim router has, ideally. The cove bit will have a rub bearing that guides-controls the line of the cut. Edge the bearing rides on needs to be straight and smooth. Small imperfections may "telegraph" into the cut profile.

Do a few practice passes on scrap, let the tool do the work and sand the mill marks from the cutter out of the profile. It'll turn out well.

Last edited by Wild Willard; 09-26-2015 at 12:17 PM.
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Old 09-26-2015, 12:21 PM   #9
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Thanks Wild Willard. And good timing...I had just decided that I might run to Home Depot or Lowes to see what their offerings were, and you've given me a bit more to go on.
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Old 09-26-2015, 01:45 PM   #10
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All good advice---a 1/2" collet machine will also come with a 1/4" collet---allowing you to use whatever bit you can find---1/2" bits are very popular right now, and are on sale more often than the 1/4" bits.

A table can be made out of a scrap of 1/2" cabinet ply---hole for the bit--base screwed in from below---a straight board clamped for a fence---

Look at 'Woodworking Talk' for home made table plans.Woodworking Talk - Woodworkers Forum
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Old 09-26-2015, 02:28 PM   #11
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Thanks for the confirmation and link. I already picked up the router and am looking at bits now. No 1/2" shank cove bits available at HD or Lowes, so I'm getting a 1/4 shank 1/4 cove bit for now. I won't be doing this til Monday, so I'll check supply distributors to see what's available and bring this back if need be. Again, thanks to all for all the help!
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Old 09-26-2015, 02:51 PM   #12
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If you decide to go with that 1/4" shank bit, be sure you take very light cuts, the last thing you want is for that bit to snap, and chase you around the shop, here's a link to bits and free shipping.

http://www.mlcswoodworking.com/shops...t=3+4+%22+cove
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Old 09-26-2015, 03:17 PM   #13
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I've been doing router work since the 1960s---I've never snapped off a 1/4" bit--

I do prefer 1/2" bits--but I never had a real issue with a 1/4" one.
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Old 09-26-2015, 03:54 PM   #14
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Quote:
Originally Posted by oh'mike View Post
I've been doing router work since the 1960s
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Old 09-26-2015, 04:23 PM   #15
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I decided to wait on the bit until monday. The selections were too slim at the big box stores. The best I could find was a 1/4" shank 1/4" cove or a 1/2" shank 5/8 cove. One seemed to big, one (maybe) too small.
@Canarywood1 : Those are about 1/3 of the price of those I saw at HD. Are those decent bits?
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