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Slab flattening router sled/mill router bit capabilities

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Forum topic by Wildpyro posted 04-02-2020 04:15 PM 500 views 0 times favorited 11 replies Add to Favorites Watch
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Wildpyro

14 posts in 63 days


04-02-2020 04:15 PM

Topic tags/keywords: router sled slab flattening router bits planing

So I built a router sled/slab flattening mill. I built the sled around my PC 690 1.75 hp router. I have a large list of priority investments for my shop and a new 3+ hp router is nowhere near the top of that list. I’m not doing large 10’+ long 30”+ wide slabs so this thing isn’t huge 24” wide 72” long 3 1/4” depth. It would be nice to be able to go 2” wide on passes but I guess that’s not realistic. I really just want to know if anyone thinks swinging a 1/2” shank 1 1/2” dado/planing bit would be impractical or dangerous or if this router would be just plain underpowered for the job and I should stick to a 3/4” – 1” bits. (It takes for-EVER). I’m open to any other pro tips or advice as well. Thanks for any input.


11 replies so far

View HokieKen's profile

HokieKen

13632 posts in 1878 days


#1 posted 04-02-2020 05:34 PM

I have a 690 and love it but I’m not sure I’d be thrilled using it with my router sled… That being said, I think you can swing the 1.5” bit just fine with it. You may end up taking lighter passes than you can with the smaller bit though so I don’t know if it will be any more efficient overall. I’d say you’re just gonna have to give it a shot and see what works best for you.

-- Kenny, SW VA, Go Hokies!!!

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Wildpyro

14 posts in 63 days


#2 posted 04-02-2020 06:17 PM

Hey HokieKen, thanks for the input. I’m not super thrilled about it either but it’s what I got. My only other router is my little 450. Like I said I have other investment priorities but ideally I’d like to get a more powerful router for the sled and maybe undermount my 690 on a table? I’m already taking 1/16” passes, I really just would like to go a little wider. Thanks again

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HokieKen

13632 posts in 1878 days


#3 posted 04-02-2020 06:19 PM

At 1/16” depth of cut, I think you’ll probably be fine :-)

-- Kenny, SW VA, Go Hokies!!!

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SMP

2014 posts in 645 days


#4 posted 04-02-2020 06:25 PM

A Sledmill sounds like an exercise machine for wood!

View Wildpyro's profile

Wildpyro

14 posts in 63 days


#5 posted 04-02-2020 06:40 PM

It is really. Unfortunately, a planer large enough for the job is way outside my budget. I’m a hobbyist and not a professional so it would be difficult to justify that kind of purchase anyway. My hand planer is good to an extent, but I found that this is a better way for the results I want.

View Davevand's profile

Davevand

177 posts in 1576 days


#6 posted 04-02-2020 07:49 PM

I would not, that router is spinning way too fast for a 1.5” bit

View tynewman's profile

tynewman

167 posts in 452 days


#7 posted 04-02-2020 08:28 PM

For a bit that size they do recommend to slow down your speed for a bit.Though, I honestly think you would be fine if you are just skimming 1/16th off the top. You could get a speed controller like this:
https://www.amazon.com/Electronic-Controller-Variable-Adjuster-Hydroponics/dp/B07T9BLJ7L/ref=sr_1_18?dchild=1&keywords=router+variable+speed&qid=1585859004&s=hi&sr=1-18
if you wanted to be able to adjust the speed.

-- Ty

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Wildpyro

14 posts in 63 days


#8 posted 04-02-2020 09:09 PM

I was thinking 27,500 is quite fast for something that large. I was also thinking it would be ok lightly skimming though. If I were to buy a larger router, something with variable speed and soft start functionality, I would likely move away from the porter cable models. Any routers you guys think would be a good fit for something like this? Do I really need 3 hp?

View AndyJ1s's profile

AndyJ1s

309 posts in 495 days


#9 posted 04-02-2020 09:54 PM

Of course you don’t NEED 3HP, but it would speed up the process by taking bigger bites, whether by faster feed rates or deeper cuts. If this is a type of work you plan to do a lot of, a more powerful router is probably a good bet.

The variable speed controls into which you plug a router greatly reduce power at lower speed. You want the modern EVS routers that maintain speed under varying loads (to a point).

Maybe a middle-of-the-road choice would be a 2+ HP EVS router?

I like my 2.4 HP Milwaukee 5916 very much, but there are plenty of other good brand/model choices. I have the fixed (w/body grip) and plunge bases for it, and it does time in my router table/lift too. The size, power and bases make it (and similar models from other manufacturers) a very versatile router.

If my 5616 router runs out of steam, I will probably get their 3.5 HP EVS 5625 model.

-- Andy - Arlington TX

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Wildpyro

14 posts in 63 days


#10 posted 04-02-2020 10:06 PM

I really appreciate the input Andy. As I said, I’m a hobbyist. Although I have sold a few small pieces, my primary, unrelated career funds my shop (and various other hobbies). I’ll do a bit more research and find something suitable. Thanks again for the advice.

View HokieKen's profile

HokieKen

13632 posts in 1878 days


#11 posted 04-03-2020 12:58 PM

I have the PC 7539 that I use in my router table and for my sled. It’s a beast and a well-made tool. Highly recommend it for the sled. Not so much for the table unless you have a lift or want to put the Router Raizer kit on it.

-- Kenny, SW VA, Go Hokies!!!

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