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Forum topic by Marn64 posted 11-12-2016 03:13 PM 519 views 0 times favorited 5 replies Add to Favorites Watch
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Marn64

295 posts in 619 days


11-12-2016 03:13 PM

Topic tags/keywords: question plane

Hey everybody,
So I recently inherited a Sargent 3415 transitional that belonged to my great grandfather and I lapped the mating surface with the blade up to 2000 grit but I wasn’t very scientific about it and I am now concerned that I potentially skewed the frog or something like that. What is an accurate way to check the squareness of the frog?
Thanks,
Benjamin

-- Benjamin, Milwaukee


5 replies so far

View HokieKen's profile

HokieKen

4505 posts in 972 days


#1 posted 11-13-2016 03:19 AM

It’s unlikely you removed that much material during lapping. As long as your iron sits flat, just set it flush with the sole and see if it’s square with the mouth.

-- Kenny, SW VA, Go Hokies!!!

View Tim's profile

Tim

3679 posts in 1795 days


#2 posted 11-13-2016 05:05 PM

A dial indicator and a sine bar on a surface plate would do it, but there’s unlikely to be a reason to go that far. So I agree with Ken.

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Marn64

295 posts in 619 days


#3 posted 11-13-2016 06:52 PM

Thanks you two, I just wanted some advice because I was worried that I had hurt a family antique. I started at 80 grit, even then do you think it is ok?

-- Benjamin, Milwaukee

View Don W's profile

Don W

18520 posts in 2401 days


#4 posted 11-13-2016 09:28 PM

I think its ok, but you should NOT polish the face of the frog. Friction holds the cutter in place, so if you have problem with it slipping, you may need to go back to 80 grit and leave it.

I agree with a transitional, it’s unlikely you took to much off. Honing the face of a transitional isn’t necessary, most of the mating surface is the wood below. Just line it up, and make sure its sharp and you should be good to go.

Note the edit to add the “NOT” in the first sentence.

-- http://timetestedtools.net - Collecting is an investment in the past, and the future.

View Marn64's profile

Marn64

295 posts in 619 days


#5 posted 11-13-2016 11:28 PM



I think its ok, but you should NOT polish the face of the frog. Friction holds the cutter in place, so if you have problem with it slipping, you may need to go back to 80 grit and leave it.

I agree with a transitional, it s unlikely you took to much off. Honing the face of a transitional isn t necessary, most of the mating surface is the wood below. Just line it up, and make sure its sharp and you should be good to go.

Note the edit to add the “NOT” in the first sentence.

- Don W


Thanks for the tip! I learn something new from you every day.

-- Benjamin, Milwaukee

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