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Coffin smoother converted to compass duty *PICS*

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Coffin smoother converted to compass duty *PICS*

#1

Coffin smoother converted to compass duty *PICS*

Scott in Douglassville, PA

>Hi, everyone -

Ok, so here's the latest project: I needed a compass/spoon-type plane to work Windsor seats. Somehow, Santa didn't come through on the Crown compass plane I asked for, so it was up to me. I found an old 6" coffin smoother on eBay for $4 plus shipping:



I took measurements from the Crown plane and transferred the axial radius to the plane and bandsawed it to shape. After that, I laid out the normal radius from the Crown, and set to work with my Stanley 18.

When the body was the way I wanted it, I Sharpied-up the bevel of the iron, installed it, and scribed the profile at the mouth. Some careful work with a grinder, then some tedious wet grinding to establish the bevel, and the iron was perfect.

Ended up something like this:




As you can see, the mouth is fairly wide (the term "gaping maw" has been bandied about), but the plane makes some pretty doggone fine 2x4 shavings. Since this is only ever going to see pine and poplar, I'm not to concerned right now.

I have a couple seats to saddle presently, and after the run-through, the plane'll be getting a few coats of BLO and a good waxing.

Thanks for looking.

Scott, butcher of fine planes since 2006

Re: Coffin smoother converted to compass duty *PICS*

#2

Looking good Scott!

Scott Burr in Ben Lomond CA

>Look like you did a fine job of turning a run of the mill plane to something usefull IMHO.

Sounds like it was a bit tricky to grind the blade to the proper radii.

The butcher of PA strikes again!

Re: Coffin smoother converted to compass duty *PICS*

#3

Having ground an iron for my No. 45

Bill Houghton, cold and rainy in Sebastopol, CA

>round base, I appreciate the work involved in matching the radius. Neat looking tool.

Re: Coffin smoother converted to compass duty *PICS*

#4

Re: Coffin smoother converted to compass duty *PIC

Dave Anderson Chester, NH

>Great job on the conversion Scott. FYI, the Crown compass planes do not have an exceptionally fine mouth or throat and still work fine. With the front to rear curve on the sole it's the projection of the blade that really seems to govern the both the thickness of the shaving and whether or not you get tearout. Experimetn a bit with the setting of the iron and I think you will make out just fine.

Re: Coffin smoother converted to compass duty *PICS*

#5

Re: Coffin smoother converted to compass duty *PIC

Phil Albany,NY

>Looks great. Regarding the mouth, what about shifting the curve drawn on the side of the plane down so that the vertex of the curve touches the original sole? That would close the mouth a bit. At this point, if it gives you trouble you could always patch but I doubt you'll need to. As you said, I don't think that it's critical for saddling seats with pine and poplar.

Enjoy,

Philip

Re: Coffin smoother converted to compass duty *PICS*

#6

Well...

Scott in Douglassville, PA

>Hi, Phil -

That's actually what I originally had laid out. Somehow, though, in shaping the side-to-side radius, I lost a good deal of the fore-to-aft curvature. I ended up doing a bit more shaping to reestablish the long radius, and ended up opening the mouth more.

I'd thought about patching the mouth before I started, essentially closing it completely, then tweaking it a bit after it opened up with the subsequent reshaping. If the mouth proves to be a problem, that's what I'll do on the next one.

Scott

Re: Coffin smoother converted to compass duty *PICS*

#7

Thanks, everyone!

Scott in Douglassville, PA

>I appreciate the comments. Like I said, I have a couple seats to make here presently, so the plane'll be getting a solid workout. Hopefully, the mouth issue won't be a problem.

Thanks again.

Scott

Re: Coffin smoother converted to compass duty *PICS*

#8

Re: Coffin smoother converted to compass duty *PIC

Paul in NJ

>That is a nice job Scott. If you are not happy with the mouth you might try closing it up with a mouth block like Steve Knight uses on his planes.

Paul Dzioba

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