01-14-2018, 02:02 PM
So I've got this Millers Falls #14 jack. I've had it in storage for awhile but got it out during my recent clean/refurb session. Its a red frog vintage and in really nice over all condition. I knew that the iron needed some grinder attention as the cutting edge had a couple of chips in it. But on closer inspection it turned out to be worse than I knew. I'm not sure what the guy was doing when he did this to the blade, but it wasn't a very good idea.
I'm just glad the mouth didn't receive any damage.
As you can see the cutting edge has been chipped all the way across. Good grief.
At some point in the past it had been hollow ground and an attempt at cambering the blade was made. Almost all of the camber is on one side.
Anyway, I have close to a dozen jack planes for some reason and have two I use most often; a Sargent 414 with the blade sharpened straight across that I use as a short jointer, and a 605 I use for face work that has a slight camber to the blade. What I didn't have rigged up was a jack with a pronounced camber in it for cross grain aggressive work. Well after looking closely at this plane iron it was apparent that grinding a radius on it wouldn't leave it in any worse shape. So I free handed a radius using a gallon paint can as a template and ground it at 25 degrees with a 30 degree secondary bevel. Getting the 30 degree bevel decent and consistent required a bit more than I anticipated, but I did manage to do a good job on my Veritas power sharpener. I don't often free hand stuff on this machine, but it can be done.
It works well. I tried it out cross grain on a cherry scrap.
I'm just glad the mouth didn't receive any damage.
As you can see the cutting edge has been chipped all the way across. Good grief.
At some point in the past it had been hollow ground and an attempt at cambering the blade was made. Almost all of the camber is on one side.
Anyway, I have close to a dozen jack planes for some reason and have two I use most often; a Sargent 414 with the blade sharpened straight across that I use as a short jointer, and a 605 I use for face work that has a slight camber to the blade. What I didn't have rigged up was a jack with a pronounced camber in it for cross grain aggressive work. Well after looking closely at this plane iron it was apparent that grinding a radius on it wouldn't leave it in any worse shape. So I free handed a radius using a gallon paint can as a template and ground it at 25 degrees with a 30 degree secondary bevel. Getting the 30 degree bevel decent and consistent required a bit more than I anticipated, but I did manage to do a good job on my Veritas power sharpener. I don't often free hand stuff on this machine, but it can be done.
It works well. I tried it out cross grain on a cherry scrap.