Juuma low angle jack plane sole flattening
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Hi ! I acquired this plane two days ago and quality seems to me very high. The iron in very hard and i had to work 15 minutes to bring it to 6000 grit. After that i stropped it following Paul instruction and now is very very sharp and seems to maintain its sharpness….
This plane has got an adjustable mouth, so my question: how to flatten the sole? what’s the correct postion of the mouth i must set before rubbing the plane on wet&dry sandpaper? Thank you, Carlo-13 May 2014 at 9:28 pm #57094Why do you want to flatten sole the quality of that plane should be well within tolerances. If sole within 3 thou or less
no need to flatten. As for mouth opening the amount it moves would not make to much difference where it is if you decide to flatten. If you do flatten make sure you do on a known flat surface like piece of granite or float glass.
The mouth is closed to the iron for finer shaving and opened for thicker shavings.I have a piece of glass 1 meter long 15 cm wide 2 cm thick which i glue up sandpaper. glass is the flattest surface mere mortals could afford. sometimes glass is not so flat as we would .. So which is the method to control the sole flatness withouth rubbing it on sandpaper? how could i check those 3 thousands you spoke about?
13 May 2014 at 10:39 pm #57099My big question how dose your plane perform now?
Place an engineered straight edge in middle of plane sole and get a 3 thou feeler gauge if gauge slips under straight edge you may need to flatten also do test with straight edge diagonally from corner to corner of sole.
The other way is to place plane on flat surface and try and slip feeler gauge between sole and flat surface all the way round.
An engineered straight edge is quite a good thing to have because at least you have a reference for straight like having a good known square that is square. You need to check your glass to see how flat it is. If it is more than a thou out could make things worse.
Abrasive I would probably start at 120 Grit up to about Max 400 Grit.
You can use Diamond plates which better makes are within 1/2 a thou.
The problem with Diamond plate is that I find them too small for task as you can tip either end of plate which defeats the object of trying to keep flat.
I am no authority on flattening plane soles but have performed technic on several older planes.
Other people my have different views on matter and may be worth listening to them as well.Hi Carlo, Mark ,
It happens that I have got a Juuma 5 several weeks ago , and I can say it’ s the best tool I have. As for the sole , I do not think that it needs to be rectified : the sole should be flattened -I think – only to an old plane or a used one which needs restoration or maintennance.
Try to use -it as a mirror , looking to a square grid. You will know , then , if the sole really needs to be flattened.
Enjoy your jack plane.Thanks for your anzwer mark and Mihai,
I’m not so experienced on planing wood by hand but i own an old no..4 restored that does its work, nothing better. I own a full set of ECE plane with wooden wedge: they needed a lot of flattening and fully re-fitting the blade to bed. ECE smoothing plane performs well, so does the scrub plane. The jointer is a pain to work with…that’s all my experience with handplane. All in all i beliebve that my low angle juuma performs well,i obtain nice shavings: very thick shavings if i want to remove much material or thinner shaving mouth almost closed, shavings probably thinner than those i obtain using Noò.4 Stanley or Ece smoothing plane. At the end, i believe it’s a good tool.14 May 2014 at 12:17 am #57109I bought a low angle jack a few weeks ago by Quangsheng which I do believe make Woodriver and Juuma they are quite good Planes with a pretty good spec if plane was outside 3 thou tolerance I would have sent it back. I can manage easily get less than a thou shaving with my Quangsheng low angle plane.
If you bought a LN or Veritas plane and it was outside those tolerances you wold definitely send it back.
I have 25 or more bench planes Records and Stanley’s Mainly and all work pretty well. The key is to have a sharp Iron.
Carlo now go and make some shavings 😉 -
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