Frog casting ID on Stanley planes

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Forum topic by Ray posted 04-18-2013 06:17 AM 1074 views 0 times favorited 4 replies Add to Favorites Watch
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124 posts in 1842 days

04-18-2013 06:17 AM

I have two type 19 #3 planes. One frog has 7U and the other had 8U cast into it. I cannot see any obvious differences. Does anyone know if one is considered beter than the other?


-- Creating less fire wood every day

4 replies so far

View ksSlim's profile


1263 posts in 2729 days

#1 posted 04-18-2013 07:23 AM

-- Sawdust and shavings are therapeutic

View CharlieM1958's profile


16272 posts in 4057 days

#2 posted 04-18-2013 12:55 PM

For what it’s worth, I’ve heard people claim that the frogs from certain types are better than the frogs from other types, but I’ve never heard of a difference in quality between frogs within the same type.

I believe it is the design of the frog that makes one preferable to the other. So if the two frogs in question look the same other than the casting mark, I wouldn’t worry about it.

-- Charlie M. "Woodworking - patience = firewood"

View mandatory66's profile


202 posts in 1969 days

#3 posted 04-19-2013 01:33 AM

I believe some of the numbers refer to the different foundries that Stanley used to cast the planes. Can’t remember where i read it.

View bandit571's profile


18634 posts in 2522 days

#4 posted 04-19-2013 01:54 AM

Sounds like pattern numbers that were used to ID were in the mold they came from. Frogs MIGHT have been cast in groups of 4-8 at a time. Larger mold, one pour to make a bunch of smaller parts. The #7, or the #8 would be known as “Cavities” in the mold. You might even find a #1u-6U marked ones.

-- A Planer? I'M the planer, this is what I use

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