Mezzaluna/pizza cutter

[Philip Davies]

I wanted to make a drawknife.

One of these,

With an 8” blade will set you back £172 (from Axminster tools) I wanted a drawknife with a 12” blade, or longer.
I had a tyre lever long enough.
It was a bugger to bend. (Consider, that as you pene out the bevel, it will cause the material to bend, so you have to bend it first in the opposite direction.)
This took quite a long time, but eventually I had bevelled the blade, with a slight concave, and drawn out tangs at each end, oriented as I wanted. I took a final heat, just to check the line.

I had a mishap. A moment’s inattention and there was a burnt bit in the middle.
That was VERY annoying.



Not willing to waste all that work ...... it was no good for a Woodworking tool, there would always be a soft spot and even if I heat treated it successfully, it might well crack in use.
I turned the tangs around, peened out the blade again and ground it up.

I think it will cut pizza. Maybe it will stay sharp to chop herbs. But it would look all right perhaps on a farmhouse kitchen wall.
We haven’t got a farmhouse kitchen.
Or it might cut fodder for rabbits. It looks like a garden tool, Mrs Davies observed.

The handles are recycled walnut, laminated. The rivets are from old handsaws. I do not know whether you can buy new saw handle rivets any more, but about 20 years ago they were about £1 apiece, so it’s worth salvaging an old saw, even one that’s been left to rot outside. I found a Disston like that once, 5 rivets and almost nothing else.
The blade guard is plastic hose.

[Toolmaker51]

I knew of 'mezzaluna' ('half moons' in Italian) as a pasta variety, kind of ravioli, being stuffed. A knife too? Who knew?

Mark of a craftsman. When at first it falls short, reinvent! How many common tools aren't like what they started out as?
Meanwhile, having a small turret lathe, is there a niche for saw rivets?

[Philip Davies]

I knew of 'mezzaluna' ('half moons' in Italian) as a pasta variety, kind of ravioli, being stuffed. A knife too? Who knew?

Mark of a craftsman. When at first it falls short, reinvent! How many common tools aren't like what they started out as?
Meanwhile, having a small turret lathe, is there a niche for saw rivets?

Thank you kindly. But how many craftsmen want extra rivets for their handsaws? It appears that manufacturing them would require up to a dozen machining processes. The male half has a ribbed shank, the female is a slot screw.

[Toolmaker51]

Thank you kindly. But how many craftsmen want extra rivets for their handsaws? It appears that manufacturing them would require up to a dozen machining processes. The male half has a ribbed shank, the female is a slot screw.

The male half has a ribbed shank, the female is a slot screw.
Knurling works on faces like diameters, and form tools......well, it's all about how many of that dozen operations are accomplished per chucking. As seen here at HMT.net an auxiliary milling spindle could slot screw heads, just need turned around.

[Philip Davies]

The male half has a ribbed shank, the female is a slot screw.
Knurling works on faces like diameters, and form tools......well, it's all about how many of that dozen operations are accomplished per chucking. As seen here at HMT.net an auxiliary milling spindle could slot screw heads, just need turned around.

Just curious to know how long it would take to make one.

[katy]

They're called sex bolts and other names: https://www.fastenright.com/products...SAAEgKP6vD_BwE

[Philip Davies]

Well I never!

[Toolmaker51]

Just curious to know how long it would take to make one.

The ribs too far apart for conventional knurl. They likely ran in four-slides, machine figuratively a 4-sided punch press, ribs and head via simple die hits and sheared from wire spool. Process generally known as "Upsetting". Nobody will have one in garage, Phillip......

Instead a guy we all know & love has
88 ton ironworker ,
85 ton OBI punch press ,
turret lathe .
1] Fed individually to head and rib (both 'coined', plastic deformation) the 'nut' 3-4 seconds each. Turret lathe, bushed in a collet for drill and tap, 10-12 seconds. 'Bolt' side same way, shank a bit oversize turn and thread acorn or geometric, maybe 15-20; no immediate solution to holding a formed part. That end could run as bar stock - turn/ face/ thread same way/ part off. Either process, slotting is singly or gang up, piece of cake.
Overall ~ Equivalent time, but cost rises due chips and waste. Stamping a nice logo, PD comes to mind ��. <- ah hell; that should have been a funny emoji

First few hundreds or so, solution is just turned parts, with straight very coarse knurl. Dieset for 'nut' would be next. Betting a bagful not much of an issue; but initials might change.......

They're called sex bolts and other names: https://www.fastenright.com/products...SAAEgKP6vD_BwE

aka "Binding Screws", but most seem around 1/4" 6mm, and aluminum. Googled that, 'binding screws', with results in many diameters.
https://www.google.com/search?q=bras...client=gws-wiz

But no initials .

[Toolmaker51]

Well I never!

Told this before, still fun.
I worked in an auto parts store, while finishing school. Had terrific interactions with customers, one a rampant practical joker.
Knowing my attraction to Hispanic females; he sent an absolutely gorgeous doll in after carburetor fittings. No one had cell phones, I-Pads, google search, electronic assistants; of course.

She read off her handwritten list - 3/8" bulkhead, barbs, couplers, compression what not. I don't think she was given all the details purposely.

List didn't specify male or female, so with all my usual customer friendly professional manner, calmly asked "male or female?".
She answered in complete sincerity and innocence "What's the difference"?

The whole counter went into a roar. I picked up a sample and demonstrated how they worked.
WE made a friend, they looked at their feet.




After all these years, interacting components are still classified by gender. I cannot conceive how the nonsense [IYKWIM] came to be.

[DIYer]

Thanks Philip Davies! We've added your Pizza Cutter to our Culinary category,
as well as to your builder page: Philip Davies's Homemade Tools. Your receipt:

Pizza Cutter by Philip Davies

tags: pizza cutter