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Setting power planer knifes.

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Forum topic by houdini0118 posted 08-16-2013 08:04 AM 1656 views 0 times favorited 12 replies Add to Favorites Watch
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houdini0118

9 posts in 1210 days


08-16-2013 08:04 AM

So i recently acquired a craftsman scroll saw, planer, and jointer off Craigslist. They seem to work great but the planer blades have some dings in them. I have heard most of these are reversible or the blades are cheap enough to replace but from what i have seen you need something called a knife gauge. Is there any way to set the knives back in without one as I don’t have one and cant seem to find were you would get one for a reasonable price.


12 replies so far

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houdini0118

9 posts in 1210 days


#1 posted 08-16-2013 11:46 AM

Ok so i think i found the knife gauge on sears website and its only 8$. Is it necessary to change the knifes?
Also the knives are not reversible so i have to get replacements but they don’t sell them on sears website or eBay how can i tell if the knives from another model are interchangeable? I have model 351.233731 thanks for any help.

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scotsman9

134 posts in 1351 days


#2 posted 08-16-2013 12:21 PM

.

-- Just a man and his opinion.

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houdini0118

9 posts in 1210 days


#3 posted 08-16-2013 12:24 PM

Its a 12 1/2 inch planer so imagine they are bigger than that.

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scotsman9

134 posts in 1351 days


#4 posted 08-16-2013 12:27 PM

.

-- Just a man and his opinion.

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Bogeyguy

548 posts in 1531 days


#5 posted 08-16-2013 12:28 PM

I’m betting you can have the existing blades ground and sharpened.

-- Art, Pittsburgh.

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scotsman9

134 posts in 1351 days


#6 posted 08-16-2013 12:32 PM

I use Amazon for all blade purchases…I have a prime account so I save every time on cost and shipping.

IMHO, grinding and sharpening a precision blade has to be done with extreme accuracy, without gauges to set and hold bevels on the knives you could run into some ugly problems.

Hope the link was helpful.

-- Just a man and his opinion.

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houdini0118

9 posts in 1210 days


#7 posted 08-16-2013 12:39 PM

would any 12 1/2 inch blade work? These look very similar http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290945151329 but the original have a flat back that buts up against the back of the cutter head as well as rust and large gouges. This looks like it would dull the other edge and im not positive they would be the same size, how close would they need to be?

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BacktotheWood

124 posts in 2484 days


#8 posted 08-16-2013 12:52 PM

If your knives aren’t too badly nicked, you can resharpen them with a simple jig and some sandpaper. Here’s how:

When making this sharpening jig it’s important to make the slots at the correct angle so the bevels of the blades lay perfectly horizontal. This way the sandpaper will have even contact. My jointer blades required a 38-degree angle but check yours because it may be different. I also had to saw the angled slots with the board on its edge. That’s because my tablesaw (like most) tilts to only 45 degrees. This is not far enough for the slot to be cut with the board laying flat. Cutting it on its edge solves this problem. Take a look at your saw and you will see what I mean. Double-check the angle of your jointer knives and saw the slots to match. I added a blade guard to keep things safe. For the sanding block I used chunks of 3/4-in. MDF with sheets of silicon carbide sandpaper attached with spray-on adhesive. I started with 220 grit and worked my way up to 600 grit for a final honing.

http://i1180.photobucket.com/albums/x403/Renaissance14/SimpleSharpeningJig-1.jpg

http://i1180.photobucket.com/albums/x403/Renaissance14/SimpleSharpeningJig-2.jpg

You can get much more elaborate with your jig. This is the most basic.

-- Bob, --Silence & smile are two powerful tools. Smile is the way to solve many problems & Silence is the way to avoid many problems.

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scotsman9

134 posts in 1351 days


#9 posted 08-16-2013 12:58 PM

http://www.amazon.com/POWERTEC-12-5-Planer-Blades-12-1/dp/B00302REH2/ref=pd_cp_hi_0

Above is a link to the exact knives for your Craftsman model #.

-- Just a man and his opinion.

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houdini0118

9 posts in 1210 days


#10 posted 08-16-2013 01:01 PM

Thank you i think the blades are nicked to badly to save so with those blades do i just shove them flush and tighten the bolts or is there more to it?

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scotsman9

134 posts in 1351 days


#11 posted 08-16-2013 01:08 PM

Once the blades are removed you’ll see “setting screws” under the blade on the mount.
They will have to be set level across and at the correct height, other wise you wont get a flat even cut and you could get a nasty dig out at the end of the cut.

I just set the tables level with the blade and use a perfectly flat (i use my combination square) gauge to set the blades at equal heights, and level across.

I hope I’m explaining that right…I need another cup of coffee.

Check this guy out: http://www.youtube.com/watch?v=fvbfdzkPPSg

-- Just a man and his opinion.

View Shawn Masterson's profile

Shawn Masterson

1297 posts in 1411 days


#12 posted 08-16-2013 01:08 PM

I am guessing it is a 2 knife cutter head. just slide one to the left and the other to the right.

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