Flat Bottom? - Woodworking Talk - Woodworkers Forum
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post #1 of 5 Old 03-12-2013, 12:13 PM Thread Starter
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Flat Bottom?

I purchased 3 Stanley planes from a neighbor for $20.00 and am restoring them. I have never done a plane restoration but thanks to all the info gathered on this forum I am giving it a go.

While flattening the sole on 220# paper mounted on 3/8" piece of glass I find after doing two of them that both seem to be concave in the middle of the sole.Is this normal? How much of that should be removed before it is considered flat enough?
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post #2 of 5 Old 03-12-2013, 01:07 PM
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The only places that need to be flat and coplaner are the heel, toe fore and aft of the mouth.
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post #3 of 5 Old 03-12-2013, 01:51 PM
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This may have more eyes if it had been posted in the Hand Tools forum.

I recently sharpened the blade and lapped the sole for a friend's Stanley No. 4 which was originally purchased by his father.

The father likely used this for his woodworking hobby.

After a slight lapping I could see the sole was concave side to side. This may have been from the factory, but was more likely wear over the decades from planing edges of boards.

As Bonka mentioned, the area around the mouth is the most important.

I lapped until the area in front of and behind the mouth were level. This ended up with most of the toe being level and the outside edges being level.

If the area around the mouth is not level, the plane will work, but the shavings will not be consistent thickness across the shaving width.
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post #4 of 5 Old 03-12-2013, 04:08 PM
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I don't get too obsessive abt. sole flattening. Some wanna get nuts about it, but the avove suggestions are worthy.
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post #5 of 5 Old 03-13-2013, 12:35 AM
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Sounds like the glass is flexing. A completely flat sole is not too difficult to achieve and will give you far better results than a plane with slight variances. Try using a jointer bed or table saw top as your flattening surface, or get a large piece of granite or marble. Sometimes is just takes a while, keep at it.
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