Thread: Is my near-wedge a near-wedge?

Originally Posted by Neil Miller

One thing to take into consideration is 'bursting force', that is the amount of speed the wheel can cope with before bursting asunder, which was a common occurrence with the natural sandstone that was used. Once you know how much the wheel can stand before this happens, you can decide on an optimal speed for a particular size wheel, and add a safety factor by keeping well under this speed.

Geeze I'm sorry I don't think Darry would be straddling a 3 foot diameter grinding wheel when there's a "Busting Force" that's probably coming.
The closest Ive come to that was once while working on a Blanchard grinder the power went out during a cut and the electro magnet threw a lower die shoe off the table into the metal guards ripping them off the machine and exploding the wheel segments. Was never more scared in my life. I was also soaked with rancid coolant.
Good Times Har!!!

Originally Posted by CtwoHsix0h

My wife might disagree. For some reason, she thinks nobody needs more than one razor.

Does she HAVE a straight razor? Does she SHAVE with a straight razor? Tell her she doesn't know what she's talking about then

Originally Posted by carlmaloschneider

Does she HAVE a straight razor? Does she SHAVE with a straight razor? Tell her she doesn't know what she's talking about then

Ha ha! No, she doesn't shave with a straight. But we've come up with an unspoken agreement -- I don't give her a hard time when she buys too many clothes and she doesn't give me a hard time when I buy too many razors.

Besides, mate, like you she's an Aussie. And I've learned over the years never to tell an Aussie she doesn't know what she's talking about.

Originally Posted by CtwoHsix0h

I don't think so. I know "Keilschliff" translates to "wedge cut" in English. "Stosser" is, I think the transliteration of "Stoßer," which means something like "piercing" or "pushing." I should probably ask my German brother-in-law to give me an official translation. But that would mean actually talking to him. :|

Rob,

No need to call the brother-in-law , they both mean wedge:

- Keilschliff = literal translation

- Stosser = old tradename that became synonymous with 'wedge' and which was/is used by many razor makers: Tuckmar Stosser, Schulze Stosser, Wacker Stosser etc They're all Keilschliffs.

Originally Posted by MichaelS

- Stosser = old tradename that became synonymous with 'wedge' and which was/is used by many razor makers: Tuckmar Stosser, Schulze Stosser, Wacker Stosser etc They're all Keilschliffs.

Only my Stosser isn't a Keilschliff. I wonder if Stosser was pre-printed on the blank that Herr Wacker acquired, then he decided to grind it hollow?

Originally Posted by onimaru55

Neil, I'd reckon less is more likely.
My 8" wet grinder runs @140rpm. I'd have thought 600 rpm would kick up quite a rooster tail of water on large diameter stones ?

I think you are correct Oz.

I have seen mention of 50 and 60 rpm, but it wasn'coupled with any other data. Some of those water troughs weredivided into three sections, for instance, so that three wheels could be run, all of different diameters, and the separate power take-off pulleys were like step-pulleys, ie they were arranged with at least three steps, giving the choice of three speeds.

In one the pics of a grinder at work, you can see that most every part of the wheel housing is covered with serried rows of gunk, the build up of sto e particles and ground metal that hags on after the water that carried it has run off.

In fact, so much water was lost from the trows that wooden boards were often fitted in front of the wheel as splashboards, allowing the water to run back, and huge pails of water were kept between griding stations for topping up purposes.

No doubt the physical size of the wheels played more of a part in this than the speed, though. There is probably a table of sfpm showing what sfpm is most suitable for each commonly used grinding material and type of steel to give an effective cutting action.

Trouble is, I have only been able to find such tables for modern materials.

These days (I know they had them in the past, eg 1940s 50s) you can buy little guages with a wheel that you press against the spindle to get a direct read out of rpm which gives you a starting point ffrom which to calculate sfpm, but I doubt they had them in the early days of waterwheel power.

Instead, like metal puddling and casting, a skilled persons experience was the guage for these kinds of operations.

Regards,
Neil

Originally Posted by CtwoHsix0h

Only my Stosser isn't a Keilschliff. I wonder if Stosser was pre-printed on the blank that Herr Wacker acquired, then he decided to grind it hollow?

I dont think so, I mean that the blanks were just that, blank razor shaped bits of steel, either hand forged or pressed out of a sheet with a tilt hammer, untempered, and very thick to allow for subsequent grinding.

The sides would be thick enough to allow for most types of grinding, so it would be useless to add any marking at this stage, as it would be ground off again.

Cant tell from the photo, but the blade markings look laser etched or something similar, and this would be appled as one of the last stages in production.

Regards,
Neil

Originally Posted by Neil Miller

Cant tell from the photo, but the blade markings look laser etched or something similar, and this would be appled as one of the last stages in production.

Regards,
Neil

You're right -- all markings on the blade are etched, not stamped. So they must have been applied after grinding:




Which leaves me somewhat baffled as to why the back of the tang is marked "Stosser" if, indeed, Stosser is a trade name for wedge.

Edit: I'm also baffled as to why my photos are attached upside down.

My Heartring Stosser is a quarter hollow - nowhere near a wedge.

And I can't find a literal definition of Keilschliff online"?

Regards,
Neil

Keil is German for "wedge" and Schliff means "cut." It's a literal translation from German to English.

What I still have trouble identifying is Stosser. I think it translates to something like "sharp" or "piercing," but the post from MichaelS above suggests it's a trade name.