A half-back and a Disston Reagan #9

[rob streeper]

I decided to expand my range and make a half-back saw. I got this one from Mike Wenzloff a few years ago and have always liked the design.


Wenzloff half back.jpg

So the firs thing I did was to cut out a plate.

half back plate.jpg

Since I didn't feel like making a pattern and cutting out a Wenzloff style handle I decided to try the handles I made a while back for my regular back saws.

The largest was too large.

handle too big.jpg


And the smallest was too small.

Handle too small.jpg


The medium one turned out to be just right.

this handles just right.jpg


Next to pick a back, I ultimately chose my heavy weight brass. While I was at it I decided to knock out a Disston #9 Reagan too. I got the pattern from Mike W's site. This one will have the stainless back.

Reagan with small handle and stainless back.jpg


I won't go into all of the details again but here are the plates with backs installed.

Backs installed on plates and handles.jpg


And here is the half-back with the plate/back assembly fitted up to the handle.

got the half back fitted to the handle.jpg

Cheers,
Rob

[Ron Bontz]

Hey, That's a really cool 3d leaf engraving. It almost looks real.
On a more serious note, it seems like I spent forever deciding on handles for my half backs. I started out by drawing in the various constraints. Hang angle, thrust vector height, etc. Then just keep the french curves handy on the drafting board and the tool bar open in the CAD drawing. I think I did a lot of blank staring as well. Good luck and enjoy.

[rob streeper]

Hang angle, thrust vector height, etc. Then just keep the french curves handy on the drafting board and the tool bar open in the CAD drawing. I think I did a lot of blank staring as well. Good luck and enjoy.

I seem to remember something from pheesics that went like 'The angle of the dangle is proportional to...'.

[rob streeper]

Here is a plate from the original Reagan patent. Note the four-fingered grip. It seems that this design relies exclusively on the thumb for directional control where the common three finger handle designs use both the thumb and forefinger to guide the saw.
Reagan Figures.jpg



The design that Mike Wenzloff has on his site (http://www.wenzloffandsons.com/faq/3...-patterns.html) appears to be a modification of the patent design in that the right side of the handle has a finger groove at the top opposite the thumb groove. Mike writes that this is the largest of three sizes of Reagan handles that were made. For me Mikes handles are a little small (Sz. 11 glove) and thus this is a 3 finger design, smaller would be unusable.
Disston Reagan handle drawing_Page_2.jpg





Has anybody seen a saw that conforms to the patent or are the only known examples the Disston versions for backsaws? How does this handle design work for those who have used it?

[rob streeper]

I got the #9 fit up and handle roughed in today. Sharpened and set the plate too.

Fit up and handle roughed in.jpg

Crosscut 12 ppi.

It works too.jpg

[Ron Bontz]

I try to align my index finger the way I normally have it cutting then draw a groove around it. I leave the beak area squared off. IMG_1939_zpscd9cab8c.jpg I had not trimmed the bolts yet when I snapped the pic. So they look too long in the pic. Actually, they were at the time.

[rob streeper]

I try to align my index finger the way I normally have it cutting then draw a groove around it. I leave the beak area squared off. IMG_1939_zpscd9cab8c.jpg I had not trimmed the bolts yet when I snapped the pic. So they look too long in the pic. Actually, they were at the time.

Hi again Ron,

Did you use a pattern for your handle, copy an original or spin your own interpretation? My tendency is to interpret rather than do a copy. Have you ever used an original? I read on the web that this handle design seems to lock the hand to the saw in a way that, to some, seems awkward or unnatural. I'm also wondering why Disston produced this style for what seems like a short time. Was it unpopular, too expensive or perhaps something else?
Nonetheless it's an interesting and eye catching design that merits revisiting. I may make a copy just to see how it feels.

Cheers,
Rob

[Ron Bontz]

All my Regans are a variant of the original. With respect to the sculpted thumb area and top horn. I still have a few handles, with a sculpted thumb I have not made. Time issues. I tried making one ( Tenon ) close to the original and did not care for it. The index finger pointed up too much. The biggest problem with Regan handles is that they are very hand specific, with respect to fit and feel. I don't make a lot of the Regan handles, but when I do I often send the handle to the owner for a trial fit and have him/her make notations or marks on the handle for a better fit, etc. A couple of years ago I drew up a whole series including a dovetail and carcass saw. They do feel different if you are not accustomed to them. When it comes to the grip, most saws are fairly generic. The Regan style handles are a bit like half backs. Either you like them or you don't.

[rob streeper]

Got the tote for the half back roughed in today.

half back rough.jpg

[rob streeper]

Just a few more things to do.

Half back pic #1.jpg

Half back handle detail.jpg

Reagan pic 1.jpg

[rob streeper]

Here's some better shots of the #9.

No 9 Reagan RHS.jpg



No 9 Reagan handle detail 2.jpg

[rob streeper]

Here's a couple of the half-back.

Half back RHS.jpg

Half back handle detail b.jpg

I haven't decided about making the saw-bolt heads and nut faces flush with the surfaces of the handles or not.

Both of these saws are handled in Palo Santo, the saw bolts are set in bronze bushings to ensure positive lock-up of the back/plate assembly to the handle.
The No. 9 above is 12 p.p.i. crosscut with 12^o rake, 15^o fleam, zero slope, 0.002" set and a 0.025" plate. The plate is lightly taper-ground and the back is folded stainless steel. Mass is 594.5 gm.
The half-back is 10 p.p.i. crosscut, 0.025" plate, 20^o rake, 15^o fleam, zero slope, 0.0035" set and the back is 1/8" brass. Mass is 737 gm.
Now they need to be engraved.