A plane iron sharpening jig - Router Forums
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post #1 of 7 (permalink) Old 09-03-2019, 07:49 AM Thread Starter
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Default A plane iron sharpening jig

Amongst my emails today was this interesting jig, I'm sure that most of us have one of those sharpening jigs and with this addition it will be so easy and accurate to set the required angle.
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post #2 of 7 (permalink) Old 09-03-2019, 09:26 AM
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Harry, that is indeed interesting. A problem I have always had, is keeping the iron square to the holder. This jig sorts that out. Somewhere on Youtube I saw a guide to improving the Eclipse-type holder in your images. Now if it would only hold bevel chisels flat - mine used to twist around, and get unintended cambers.

I bought the Lee Valley sharpening system some years ago, and got very poor results - the blade was supposed to be automatically squared by the apparatus, but wasn’t, and the hold-down thumbscrew did not keep it fixed in position, if one adjusted it manually.
Shortly thereafter, they brought out the Mk II, which Stick praises. Just my luck.
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post #3 of 7 (permalink) Old 09-03-2019, 11:27 AM
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Nice. As far as I am concerned, a plane iron is the only thing you need a sharpening jig for.

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post #4 of 7 (permalink) Old 09-03-2019, 11:28 AM
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I have a Stanley jig like the one in this ebay ad https://www.ebay.com/itm/VINTAGE-TOO...wAAOSwuXtdF8Bz that works similarly Harry. It being made for Stanley plane irons it had a post with a roller on one end and a shoulder that fit in the iron slot at the top end. All the slots must have been the same size for the irons it was meant to work with. I found it wouldn't fit the shorter block plane irons. It has a brass arm on the jig marked 25* and 30* and when you align the end of the iron to those marks it will hone those angles. It does a pretty good job. As long as the iron is already reasonably square across the end it will maintain it square and because plane irons are wide it is very stable on a hone, even with the single wheel.

Keep in mind that the measurements you show in your photo are specific to that jig. You are working with the legs of a triangle with the height of the jig as one of the legs. Since similar triangles have legs with proportionate lengths that means that if your jig height is different then the leg that the plane iron makes will be proportionately different as well.

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post #5 of 7 (permalink) Old 09-04-2019, 08:26 AM
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The German caption for the string mounted piece says
"By adding a wooden spacer between the stop and the cutting edge, the bevel angle can be further increased, e.g. when you want a secondary bevel."
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post #6 of 7 (permalink) Old 09-04-2019, 09:16 AM Thread Starter
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Quote:
Originally Posted by Wood Chip View Post
The German caption for the string mounted piece says
"By adding a wooden spacer between the stop and the cutting edge, the bevel angle can be further increased, e.g. when you want a secondary bevel."
Thank you Gary for the translation, I couldn't figure out what the item was for.

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post #7 of 7 (permalink) Old 09-04-2019, 09:20 AM Thread Starter
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"Keep in mind that the measurements you show in your photo are specific to that jig. You are working with the legs of a triangle with the height of the jig as one of the legs. Since similar triangles have legs with proportionate lengths that means that if your jig height is different then the leg that the plane iron makes will be proportionately different as well."

The reason Charles that I didn't think of that is because I've seen what appears to be identical jigs for, it seems like forever so I assumed they were all identical irrespective of the maker.
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