Thread: Hollow grinder

The wheel is very small in dia.
A double hollow is something like 4" over 5"

Thank you Bruno for your input I just figured since it was advertised as such it would work an it would do the job just fine. As for it being slow since I'm thinking of starting out, slow would be good so I don't rush it.

10 pups do you mean that the top wheel should be 4" an the bottom should be 5"?

I also found this one what do you think of this one?

I’ve used something similar to the grizzly (i.e. a Scheppach TIGER2500S) for the final grinding on a couple of razors I have made out of old files.

It’s painfully slow, and you will want (need) something faster to the initial hollow grinding of the hardened steel. I used a 6’ bench grinder with a Norton 3X wheel, they run really cool, but do throw of a bit of dust.

I also modified the water grinder to make it run twice as fast (by putting a collar around the drive shaft) and put a courser/narrower wheel on it (10x1 inch 46 grit bench grinder wheel) to improve its cutting power (compared to the 200 grit 2 inch wide wheel it came with).

I had the water grinder lying about (from a previous life sharpening wood working tools) and it did the job, but I wouldn’t buy one for the sole purpose of grinding razors.

If I had to start out again I would probably just use a bench grinder with a CBN wheel (CBN Grinding Wheels| D-Way Tools), they run absolutely cool (no need for water cooling) and they are explosion proof (so you can take the guards of and run a bigger wheel on a small grinder).

FYI I’m in the process of upgrading from the Scheppach, to something similar to (although homemade and not nearly as aesthetically pleasing as) the water-cooled grinding wheel used by mastro livi.

Thank you DrDalton. I kinda thought that I was just gonna have to shell out some cash to build something better instead of trying to get by with something cheaper I just wasn't sure since these items claim to be built for these kinds of projects. That's why I came here so I could get good input not just guessing.

I just meant the smaller the radius the more difficult to hollow. The smallest I have heard of anybody using is 4" and 5" to do a double hollow. That would be grind the bottom half of the blade to 5" dia. and then on top of it with a 4 " wheel. Not too many do that. I use 6 and 8" wish I had a 10" . If you look at blade profiles you will see the radius I am talking about. Some of the wedges look like over 18" dia. You can do it with a smaller wheel it's just a PITA IMHO :<0)

For What it's worth. I have ground a few blanks with the WEN/ Sears type machines.
They are nice for a refund on an older wedgey blade. I did cut one wheel down to about 1.5"dia.
Slow and there is barely enough clearance for scales on a long blade. Cheap at garage sales.
But! Damn good for a starter!
~Richard

A lot of us started with pretty simple tools. Check out post #28 here; http://straightrazorpalace.com/get-t...as-meet-3.html

Charlie Lewis had many grinders made from shopping cart wheels and such.

For what it is worth we are all using 2"x72" belt grinders now.

That is a Chinese copy of a Tomek sharpening machine and it runs at 90 RPM.

Originally Posted by KsStraightShaver

Thank you Bruno for your input I just figured since it was advertised as such it would work an it would do the job just fine. As for it being slow since I'm thinking of starting out, slow would be good so I don't rush it.

10 pups do you mean that the top wheel should be 4" an the bottom should be 5"?

I also found this one what do you think of this one?

WEN- have one that I got in a bunch of tools I bought, kinda worthless IMO for razor grinding.

I have an 2"X72" Belt grinder which should be the minimum for serious grinding, an 1x30" will work but they are in the slow class almost as slow as the wen, which would burn out 2-3 motors to clean up 1 razor blank.

The Grinder for making Razors that would be interesting, has a pair of counter rotating wheels that I have seen Old Razor Grinders from the early 1900's sported.

Where are these grinders now? There has to be a few still around and WHO made them?

Blueprints of the grinders should still be found if we can find the original makers names.