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Planer question

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Forum topic by Betsy posted 103 days ago 157 views 0 times favorited 7 replies Add to Favorites
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Betsy

1785 posts in 383 days


103 days ago

Topic tags/keywords: planer shearing action

I was reading Marc Adams’ safety article in this month’s Popular Woodworking and this raised a question. (It does aggravate me when I see these articles and they show only those large machines that most of us hobby folks could not hope to own—- but that’s another post.)

He spoke of the “shearing” action of the planer if you angled the work piece going into the planer.

I’m assuming this “shearing” action is the same as if, when using a hand plane, you skew the plane in one direction or the other instead of going straight on the board. Is this right?

It seems to me that on a small lunch box planer like most hobby folks have this will greatly limit the size of boards you can run through the planer. However, if you have a particularly narly board, it may be a good idea.

What are your thoughts on this?

-- Betsy - GO BUCKS!

View EdC's profile

EdC

420 posts in 327 days


103 days ago

Betsy,
A lunchbox planer is 12-13” in general, how often are you running wide boards thru? I can see having wide glue ups. I normally use stock 6” or less in width due to the movement in the wood being greater with wide boards. With a 6”-8” board you should still be able to feed the stock on a angle with a “lunchbox”.
Besides it’s still more fun putting the good old hand planes to work??
Have fun,
PS, how are you feeling now, from the accident?

-- Ed Collinge- Edmonds, WA.

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Sac

192 posts in 120 days


102 days ago

How do you like the Popular Woodworking magizine?

I agree, I have always hated articles in magizines where they are referring to machines that the average wood worker will not have due to it’s cost.

I’ve yet to even turn on my planer to even test it to see if it works. It’s a Ryobi. So I am learning the logo used with this and all other tools from here at LJ’s. I will have to test this out since I have alot of rough lumber to plane.

-- Jerry, Measure 10 times cut once. Set in the foothills of the Smokey's

View Don Newton's profile

Don Newton

105 posts in 105 days


102 days ago

Jerry,
I love Norm dearly but he makes me crazy with the machines he has. How many people have the room he has or that Timesaver drum sander! I often wonder if a lot of what he does is prepared by others?

-- Don, Pittsburgh

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Betsy

1785 posts in 383 days


102 days ago

Ed – I have to agree the hand planes are more fun. Thanks for asking how I’m doing. I’m holding up. I’m having a lot of arm problems from a disc issue in my neck. I see the doctor on the 9th and he’ll tell me what I’ll have to do to fix the problem. The arm is what is keeping me from the shop – although I’m learning to do a lot of stuff left handed—- I just don’t understand how lefties made it through evolution. :-)

Sac – I like Popular Woodworking OK. I usually only subscribe for a year at a time. I’ve found that most, if not all, the magazines, simply rehash the same stuff over and over and so i take a year’s worth, then stop it for two years or so. So when I pick it up again, it’s fresher.

Jerry – I don’t know all that much about Norm – but I’ve heard that he does all the work himself. The only thing behind the scenes are the camera guys. The shop that is on the show is not his. His shop is apparently very modest in size. I understand that Norm is a super nice guy that is very down to earth and very personable.

-- Betsy - GO BUCKS!

View GaryK's profile

GaryK

8489 posts in 475 days


102 days ago

Skewing any blade from square will help it cut better.

It’s cutting action is more like slicing rather then chopping.

It’s like those knife sharpening commericals on TV. If you notice they chop straight down with the “dull” blade, but take long slices with the “sharpened” blade.

Width permitting, I always run my boards through the planer at an angle, and not straight through. It also make the blades stay sharper by using more of it for the cut.

-- Gary, East TX -- The longest journey begins with a single step.

View Betsy's profile

Betsy

1785 posts in 383 days


102 days ago

That’s good enough for me. Thanks Gary.

Where have you been hiding, have not seen you much lately?

-- Betsy - GO BUCKS!

View Earle Wright's profile

Earle Wright

122 posts in 207 days


102 days ago

There is a subtle flaw in the logic of Marc Adams suggestion. Angling the work (wood) has nothing at all to do with the angle of the cut. The cut is determined by the relative angle of the blade edge to the center of rotation of the turning cylinder. In the case of a traditional planer, the blade is ALWAYS parallel to the center of rotation. Every time a blade meets the wood it is chopping rather than slicing. By angling the wood, the planer is only chopping it at a different angle on the wood. It is NOT slicing it.

An improvement over the traditional arrangement described above was to arrange small square blade segments in a spiral around the cylinder. Each segment still remained parallel to the center of rotation, but the one big ‘chop’ was segmented into a series of small chops occurring sequentially.

With a newer technology (the Byrd ‘shelical’ head, for instance, found on the newer Powermatic planers), the blade edges of the segments are not parallel to the center of rotation. Rather, the cutting edge of each segment is angled to follow a spiral around the cylinder. This is the first TRUE application of a shearing cut in the examples presented.

-- Earle Wright, Lenoir City, Tennessee

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