Thread: Radius Dresser

Funny that: Two days ago I got an SPI dresser delivered ex ebay. You are welcome to borrow it for a month or two until our grinder project is finished and we want to get fancy-schmancey with custom profiled wheels.

BTW...it looks well made, I don't think it is Chinese as so many SPI things are these days. It was old stock. It even has some Hurricane Sandy rust on it.

Greg

It is funny how that stuff happens, I also noticed Nick Muller, picked up a optidress for 80 euro in the last few days as well:S.

I would love a short video or pictures of the details would be great.

I may have to take you up on your offer as a stop gap since the idea of making the patterns, casting and aging the iron seems a little exhausting to me at the moment, especially in this heat. But I have people waiting for their sets of firmer chisels and that is the last step in the process as I didn't want to go flat to round to flat again with the wheel profile. They have waited a long time so another little bit wont matter too much I hope. I'm waiting on a call back about a new old stock one in Melbourne at the moment I will see how that goes first. I'm always a little nervous about getting second hand precision gear shipped, I'm glad yours arrived safe last time Ray and I did that we got a box of loose and dented angle plates and squares.

I have a rather beat up Yuasa 550-001N (see pdf below)
I bought it as a fixer-up but it is really too big for my needs (especially as I haven't even got a working grinder yet)
It's heavier and further away, but if you want to borrow it to unlock it's secrets then it's available.
One of hte interesting features of these is that one know does radial adjustment, the other angular, so there are some quite unexpected shapes that can be generated.
pg132-1.pdf

Michael

Negative worries. Let me know if/when you want it. Raymond may still want the stainless enclosure that I have here too.

Greg

BTW, I bought this along with a 5C indexing do-dad for gashing endmills on a surface grinder. They came mummified in the carton. I think my recycling bin is half full already just from the packaging.

Some sellers are gems, some are twats.

A simple yet time proven & accurate method of dressing profiles into grinding wheels on surface grinders is to "Crush Dress"
No conventional diamond dresser method is used, just a reverse of the profile machined into a cylindrical piece that is then mounted to freely revolve in a homemade holder.
The holder & the "Crusher" is mounted below the grinding wheel on the centre line of the wheel & is held by the magnetic chuck.
The grinding wheel is revolved by a hand winder at slow speed,(not power) & the wheel head fed down on to the "crusher" The crusher & the grinding wheel rotate with the hand driven grinding wheel driving or rotating the crusher until the form is completed.
The result is a grinding wheel formed to the pre required profile that cuts very efficiently.
I learnt this during tooling apprentice days & still have the holder made at the time. We used this system for grinding precision press tool die work.
If any one is interested I will set it up on my surface grinder & take some photos accordingly.
regards
Bruce

Bruce, please set it up and take some photos!
I'm very interested in the principle and seeing how it works. I understand the idea that it exposes the natural sharp-edged surfaces of the grains of the grinding wheel, rather than the -hopefully- sharp enough edges of diamond cut surfaces of those grains.

Originally Posted by Greg Q

Raymond may still want the stainless enclosure that I have here too.
.

Indeed he does...

Hi Michael,
Josh found a Yuasa 550-001N on ebay and promptly suggested I should buy it... I'm still trying to get a handle on the freight cost. But Shipitto is temporarily down.

Nice looking gizmo, looks interesting.


Thanks Bruce, we are definately interested in the crush dressing technique, that sound like just what we need..

Regards
Ray

PS Added ebay link.. Yuasa Model No 550 001 Radius and Angle Dresser | eBay

Originally Posted by Abratool

A simple yet time proven & accurate method of dressing profiles into grinding wheels on surface grinders is to "Crush Dress"
No conventional diamond dresser method is used, just a reverse of the profile machined into a cylindrical piece that is then mounted to freely revolve in a homemade holder.
The holder & the "Crusher" is mounted below the grinding wheel on the centre line of the wheel & is held by the magnetic chuck.
The grinding wheel is revolved by a hand winder at slow speed,(not power) & the wheel head fed down on to the "crusher" The crusher & the grinding wheel rotate with the hand driven grinding wheel driving or rotating the crusher until the form is completed.
The result is a grinding wheel formed to the pre required profile that cuts very efficiently.
I learnt this during tooling apprentice days & still have the holder made at the time. We used this system for grinding precision press tool die work.
If any one is interested I will set it up on my surface grinder & take some photos accordingly.
regards
Bruce

I know of the technique, but I have never seen it, and like Joe I would love to see it.

Originally Posted by Michael G

I have a rather beat up Yuasa 550-001N (see pdf below)
I bought it as a fixer-up but it is really too big for my needs (especially as I haven't even got a working grinder yet)
It's heavier and further away, but if you want to borrow it to unlock it's secrets then it's available.
One of hte interesting features of these is that one know does radial adjustment, the other angular, so there are some quite unexpected shapes that can be generated.
pg132-1.pdf

Michael

It looks to me like Yuasa Dressers is now GIN Chan.

I also found a manual for the Yuasa 550.

Originally Posted by Brobdingnagian

It looks to me like Yuasa Dressers is now GIN Chan.

These dressers are still on the Yuasa website (YUASA). From previous experiences I can say that the Chinese are very good at copying other's products regardless of IP rights. They could well have bought one and reverse engineered it. While some of their copies are very good, at other times it looks the part but isn't. I won't buy brand name items (Mitutoyo for example) from sellers in China because you just don't know.

Michael

Originally Posted by Michael G

These dressers are still on the Yuasa website (YUASA). From previous experiences I can say that the Chinese are very good at copying other's products regardless of IP rights. They could well have bought one and reverse engineered it. While some of their copies are very good, at other times it looks the part but isn't. I won't buy brand name items (Mitutoyo for example) from sellers in China because you just don't know.

Michael

The photo's on the Yuasa website have GiN stamped on the side (probably made under licence). I think there is nothing wrong with Taiwanese stuff, the few vertex accessories we have are good quality the only thing that lets them down is the neatness of castings in some places. I was also very unsure about the testing certificate that came with the small surface plate from carbatec, that was until I ran over it with the inferometer and sure enough it is within spec.

A simple yet time proven & accurate method of dressing profiles into grinding wheels on surface grinders is to "Crush Dress"

I have heard and seen crush dressing, but never used it.
The method I know works a bit different.
Your's seems to be more basic and way easier for the simple equipped (not simple minded!).

Is that just a simple round wheel? No coating? Hardened?
Please tell us more!

I would love a short video or pictures of the details would be great.

A video of the Optidress? Part is hard to make, because it requires a look through the optics.


Nick

Originally Posted by Brobdingnagian

It is funny how that stuff happens, I also noticed Nick Muller, picked up a optidress for 80 euro in the last few days as well:S.

I would love a short video or pictures of the details would be great.

I may have to take you up on your offer as a stop gap since the idea of making the patterns, casting and aging the iron seems a little exhausting to me at the moment, especially in this heat. But I have people waiting for their sets of firmer chisels and that is the last step in the process as I didn't want to go flat to round to flat again with the wheel profile. They have waited a long time so another little bit wont matter too much I hope. I'm waiting on a call back about a new old stock one in Melbourne at the moment I will see how that goes first. I'm always a little nervous about getting second hand precision gear shipped, I'm glad yours arrived safe last time Ray and I did that we got a box of loose and dented angle plates and squares.

I don't know about others but I don't care about waiting a bit longer - take it easy - get the right things so you are happy with the job and then we'll settle it all up and everyone will be content

Neil

One thing at the moment we won't need rust treatment around here (queanbeyan)

Originally Posted by MuellerNick

I have heard and seen crush dressing, but never used it.
The method I know works a bit different.
Your's seems to be more basic and way easier for the simple equipped (not simple minded!).

Is that just a simple round wheel? No coating? Hardened?
Please tell us more!



A video of the Optidress? Part is hard to make, because it requires a look through the optics.


Nick

All the information is valuable. Crush dressing seem a very useful technique to have in the brain toolbox.

As far as the optidress or any dresser for that matter, I just want to see how all the pieces work together. I can take a guess as to what you might see through the optics. most of the designs are quite novel for me as I have never used one or seen one in the flesh and I'm sure that there is subtilty there that I would miss otherwise.

-Josh