Fortuna model10A bell knife sharpener stone

[richco]

Hello All,

I am restoring this Fortuna model10A leather skiver,I am having trouble with understanding how the bell knife sharpener stone is held on the shaft it looks to me it was glued on when I tried to remove it from the shaft it broke in half stone measures 70x7x17.5 could anyone please confirm me if it glued on or there's any other part to keep it there.Thanks

[Beehive]

I'd back track operation instructions on replacing the grinding wheel. There has to be some kind of mechanical attachment to keep the wheel on the shaft. Shaft nut of some kind. Otherwise, you'd be reading about, "grinding wheel glue". 

 

Maybe the top of the Arbor shown in the picture expands out. Gripping the wheel by the arbor hole. I can't see if the middle of the arbor is threaded or if it's just a hole. 

 

 

[richco]

3 hours ago, Beehive said:

I'd back track operation instructions on replacing the grinding wheel. There has to be some kind of mechanical attachment to keep the wheel on the shaft. Shaft nut of some kind. Otherwise, you'd be reading about, "grinding wheel glue". 

 

Maybe the top of the Arbor shown in the picture expands out. Gripping the wheel by the arbor hole. I can't see if the middle of the arbor is threaded or if it's just a hole. 

 

 

Thanks for reply,the top part is solid and don't get expend while tight.

[Tigweldor]

Ask the manufacturer for a repair manual - they are still in business and they did make a repair manual for the 10A.

 

https://www.fortuna-gmbh.de/EN/CONTACT/content.php

 

[Tigweldor]

Here a vid - watch from about 17:30 on  --- looks like your stone is just stuck on the shaft - just pry it off.

Ask uploader where he got his replacement from.

Greetings

Hans

 

[Tigweldor]

Here is a vid of the shaft  assembly and of the different hardness stones that are available (read first comment) : 

If you click on the uploaders name - he has other videos as well on skiver maintenance and adjusting

 

Edited April 8 by Northmount
Removed redundant link

[xnikolaos]

https://www.tecon.it/en/skiving-knife-grinding-wheels/

In this address you will find everything you need for knife sharpening wheels. But first you have to disassemble the mechanism and do some simple diameter measurements to find what you need. There are 2 types of wheels.

[mbnaegle]

Some Fortuna and Italian skiver grind stones were/are hub-less, using a separate reusable nut and spacer, but some use a stone that has an epoxied aluminum hub that comes from the factory as one part. Both work fine and most of the time you can use either one on many machines (handy if you have an older skiver that someone lost the nut or spacer), and companies selling expendable skiver parts should have both, just tell them you need the stone with the aluminum center. I don't think the stone ID's are the same though and I wouldn't bother trying to glue a new stone onto an old hub. All of these wheels use the same left hand threads so they don't come apart when spinning, and most grinder spindles have a slot, hex socket, or a grip-able knurl on the bottom side of the pulley below the grinding wheel to hold it with, and you should only need to hand tighten the stone end when putting them together. If it's locked up, you might have to break the stone (you're halfway there!) and get some pliers on the hub.