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Thread: Compass Plane

  1. #11
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    Here's a picture of the last bow rocker I made.

    The compass plane would have made the job easier, I'll keep looking at the trash & treasure markets......


    Colin
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  2. #12
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    Having mucked around with planes I'd say that the timber is key. Beech, oak or the like is what used to be used for compass planes working on curved parts. Aussie timbers are not like that. Softwood would be a PITB.

    My best curves have involved careful band sawing with a fine saw blade, going really slow. And then my 3" belt sander with 240grit followed by hand sanding to as fine as was still creating dust. Scraping is good in theory but the grain is not uniform on a curve so also difficult.

    Hand sanding always wins in the end and is controllable.






    Quote Originally Posted by gromit View Post
    Amongst many projects I'm making a rocking horse on bow rockers and would like to track down a compass (or circular) hand plane.

    I found a Stanley #113 some years back but it's incomplete, the knob that controls the curvature of the base is missing. It has a LH thread on the outside and a RH thread internally. To add to the pain the cast section it screws into has been broken and bronze welded so the thread may need cleaning up which means determining the thread and organsing a LH tap. Mine is also missing the palm rest behind the blade.



    I found a knob on Ebay which after adding freight etc. comes to over $60. I'm just trying to convince myself that a $60 knob is worthwhile especially as the thread may still need re-tapping.

    The outside of the curve I can probably do with a conventional hand plane, the inside with spokeshaves. Neither will be easy to get an even curve.

    Any other ideas how to finish plane a large curved piece of timber ?

    Colin

  3. #13
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    Quote Originally Posted by Parker View Post
    Having mucked around with planes I'd say that the timber is key. Beech, oak or the like is what used to be used for compass planes working on curved parts. Aussie timbers are not like that. Softwood would be a PITB.

    My best curves have involved careful band sawing with a fine saw blade, going really slow. And then my 3" belt sander with 240grit followed by hand sanding to as fine as was still creating dust. Scraping is good in theory but the grain is not uniform on a curve so also difficult.

    Hand sanding always wins in the end and is controllable.

    Last bows I made were European Beech.
    Horse is from 'clear pine', no knots and fairly easy to carve.

    Bows are made in two pieces joined in the centre.

    Colin
    '56 Series 1 with homemade welder
    '65 Series IIa Dormobile
    '70 SIIa GS
    '76 SIII 88" (Isuzu C240)
    '81 SIII FFR
    '95 Defender Tanami
    '58 Series II (sold)
    Motorcycles :-
    Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C

  4. #14
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    Rocking horse runners

    Re metal plane. your local men’s shed will likely have to tools and experience to help, and if not will refer you to one that does.
    They are a great and very economical resource for that type of one off work.

    The runners are easy to make with a full size pattern drawn to full size onto say Bunnings thin ply and then cut out, as already advised, by band saw. The fact that you need the bottom cut at an angle is easily fixed by cutting on a band saw table set at the angle required, and remembering that the two sides may be different as a result of course, depending on your profile. Then finish with spoke shave sanding etc.
    As a amateur boat builder that type of cutting is often needed as you can imagine.
    Cheers

  5. #15
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    Quote Originally Posted by Bigpete View Post
    Re metal plane. your local men’s shed will likely have to tools and experience to help, and if not will refer you to one that does.
    They are a great and very economical resource for that type of one off work.

    The runners are easy to make with a full size pattern drawn to full size onto say Bunnings thin ply and then cut out, as already advised, by band saw. The fact that you need the bottom cut at an angle is easily fixed by cutting on a band saw table set at the angle required, and remembering that the two sides may be different as a result of course, depending on your profile. Then finish with spoke shave sanding etc.
    As a amateur boat builder that type of cutting is often needed as you can imagine.
    Cheers
    I'm a member of the local woodwork club (registered as a Mens Shed) and they have few hand tools and limited experience with hand tools. I regularly take down hand planes and they are often surprised that I still use them.
    I was the first to hand carve a horse, they have all used angle grinders !

    If you read the thread I've already made one set, just looking for a easier way of finishing the concave/convex surfaces. Patterns are hanging in the shed.



    Colin
    '56 Series 1 with homemade welder
    '65 Series IIa Dormobile
    '70 SIIa GS
    '76 SIII 88" (Isuzu C240)
    '81 SIII FFR
    '95 Defender Tanami
    '58 Series II (sold)
    Motorcycles :-
    Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C

  6. #16
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    Rocking horse

    Quote Originally Posted by gromit View Post
    I'm a member of the local woodwork club (registered as a Mens Shed) and they have few hand tools and limited experience with hand tools. I regularly take down hand planes and they are often surprised that I still use them.
    I was the first to hand carve a horse, they have all used angle grinders !

    If you read the thread I've already made one set, just looking for a easier way of finishing the concave/convex surfaces. Patterns are hanging in the shed.



    Colin
    Oh ok got it. We have a full metal shop at ours, so metal jobs and thread cutting etc is easy here, and yes I see you have made one before....very nice it looks too.
    No easier way that I know of than setting up a good band saw to cut the profile and angles....then use a spoke shave to get close to your desired under runner profile and finish it off with a scraper blade that you grind to the concave final surface you want.
    If as you seem to, like using hand tools then a non abrasive way is with planes and scrapers for the under runner side. The inside of the runners would be ok with a convex plane. But by the time you go to the trouble of finding the best tool for the job, for what I presume is a one off more or less, just go with what you have?
    Cheers

  7. #17
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    Quote Originally Posted by Bigpete View Post
    Oh ok got it. We have a full metal shop at ours, so metal jobs and thread cutting etc is easy here, and yes I see you have made one before....very nice it looks too.
    No easier way that I know of than setting up a good band saw to cut the profile and angles....then use a spoke shave to get close to your desired under runner profile and finish it off with a scraper blade that you grind to the concave final surface you want.
    If as you seem to, like using hand tools then a non abrasive way is with planes and scrapers for the under runner side. The inside of the runners would be ok with a convex plane. But by the time you go to the trouble of finding the best tool for the job, for what I presume is a one off more or less, just go with what you have?
    Cheers
    I'm almost there with an incomplete Compass plane so I'll have to stick with a spokeshave and sanding for now.

    Our woodwork club has Mens Shed status mainly for funding purposes. I only attend on a Wednesday evening as I work full time but I get the impression there are only a few with any real woodworking skills.
    Fortunately I have a lathe, mill etc. at home for metalworking.

    Here's another horse on an unusual safety stand. Hand made bridle & saddle, missing a mane in this picture.

    IMG_0753 by Colin Radley, on Flickr

    Colin
    '56 Series 1 with homemade welder
    '65 Series IIa Dormobile
    '70 SIIa GS
    '76 SIII 88" (Isuzu C240)
    '81 SIII FFR
    '95 Defender Tanami
    '58 Series II (sold)
    Motorcycles :-
    Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C

  8. #18
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    I spoke to my friend. He has one that is around 150 years old ( he won't lend it ). He says you should continue with fixing yours as you won't regret it. They can still be obtained, but the price?
    https://www.thewoodworks.com.au/shop...planes-compass
    ​JayTee

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  9. #19
    TonyC is offline Master Silver Subscriber
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    Hi Colin,
    I have a plane that looks the same as the one pictured, it's missing it's blade.
    No I don't want to part with it, but if I can provide any measurements or photos let me know.

    Tony

  10. #20
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    Quote Originally Posted by TonyC View Post
    Hi Colin,
    I have a plane that looks the same as the one pictured, it's missing it's blade.
    No I don't want to part with it, but if I can provide any measurements or photos let me know.

    Tony
    Thanks Tony,

    Details of the external lefthand thread on the curvature adjustment knob would be helpful.
    I could make a knob, it won't be as ornate as the original but would allow me to at least use it in anger.

    Thanks,


    Colin
    '56 Series 1 with homemade welder
    '65 Series IIa Dormobile
    '70 SIIa GS
    '76 SIII 88" (Isuzu C240)
    '81 SIII FFR
    '95 Defender Tanami
    '58 Series II (sold)
    Motorcycles :-
    Vincent Rapide, Panther M100, Norton BIG4, Electra & Navigator, Matchless G80C

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