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Hello. I found these new hones from Germany and wondered if any of you guys have any experience with them? They are really cheap and promise to be around 5k…
RIESIG ! GRAUER BROCKEN 220x60x32 AbziehStein bis #6000 SchärfStein Schleifstein | eBay
Kristian
Other than the text being in german, I see no where where it says that they are german stones. In fact there is no mention there of their origin at all.
good point! I fell for the "broken" with I took as a German origen. I will ask the seller :-)Quote:
Originally Posted by Munichjoe
It looks a bit like the plainer type of Rozsutec hone from Slovakia - Mala-Fatra mountains I believe. The stated grit equivalence is about the same as is usually quoted, although users say it is finer, and it is hard - very hard - like it says in the item description.
They come in blocks or flat - the flat ones are fairly cheap. Some seem to have bands of quite striking colours, while others look like a faintly banded greyish stone.
The greyish ones seem to be most used as scythe stones - canoe-shaped often, and as such I expect that they are of a coarser grit than the more colourful ones - can't see someone labouring for ages on a scythe-edge!
The hardness makes it a slow stone to use, and while hard to lap it lasts in a trued condition for a very, very long time.
Not saying that is what it is, but it does seem to share some characteristics.
Be interesting to find out exactly what it is.
Regards,
Neil
Brocken is German for piece of rock. THis one is a quartz sandstone, 4-6K accoriding to seller, 7 on Mohs scale of hardness. It has 2 sides, the one flat the other gefasst: a German word I don't know in this sense.
Im pretty sure that "gefaßte Kanten" is a misspell. It probably should be "gefräste Kanten", in which fräsen means milling, so gefräst means milled edges.
Also, its not 1x, but 2x flat sides, though to be more specific, "plan" or "plane Fläche" means not just flat, but plane surfaces, ie. lapped surfaces.
I have the stone already 2 years in my possession. Stone number 231 is a "Bergischerland Sandstein", 220 x 60 x 32.5mm, weighing 1132 grams. The Scratch resistance = 800 grams (Sclerometer) and its mass is 2.65 g/cm3. The stone is quite coarse and by using a diamond stone to flatten, it seems to get a finer structure but it increases the cutting speed. Diamond is so hard that the tops of the quartz crystals are flattened. IMHO, the actual grain is around 800 a 1000.