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Posted by David on May 16, 2008, 4:21 pm
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Well, I have gone and done it now. Ground them up.
I was surprised as to how much I had to take off to clean them up
thoroughly.
I marked each jaw with black marker then ground them. The first strikes were
at the rear of the jaw and I set my dial index. By the time I had cleaned
all 3 jaws, I had taken about 0.28mm off (radius).
No wonder my bars were never round and I also had probs with small bar
riding over the tool. (I know, a bad workman never blames his tools, I
wasn't blaming them, I just never took account of this problem...)
Anyhow, all done. Just have to do it again on my other lathe when I have
that up and running.
I fastened my grinder to a bar with some hose (jubilee) clips. This bar I
mounted in my toolpost. I had problems with the grinder moving when I
switched it on initially. However, when it was stable, I was then able to
work with it. I think I will make a proper clamping arrangement for it.
Best regards,
Dave Colliver.
http://www.AshfieldFOCUS.com
~~
http://www.FOCUSPortals.com - Local franchises available
> Hi all,
>
> Towards the bottom of this page
> http://homemetalshopclub.org/news/aug04/aug04.html is an article on
> grinding chuch jaws. The method seems to make some sort of sense.
>
> I have a Toledo TCT 15 Combimachine grinder (struggling to find any decent
> images, but look here
> http://www.wowowo.co.uk/top_products/5292/5292-30.htm about a 1/3rd way
> down).
>
> I need to somehow mount the grinder to my lathe in order to grind the
> jaws. My lathe is a boxford cud (4.5" center height). If I were to stick
> the grinder direct onto my compound slide (replace the toolpost), it will
> be about center height, but as the case is plastic and no flats on it, I
> am not sure how I would mount it.
>
> Looking for ideas (or if anyone has done something similar, perhaps some
> photos).
>
>
> On another note, when I can get it mounted, no doubt I could do
> cylindrical grinding... (I used to be a trained grinder before I joined
> the airforce). I would prefer to dress the wheel prior to grinding. I have
> a diamond dresser, any ideas how I would mount it in order to dress my
> wheel parallel?
>
> Thanks.
>
> Best regards,
> Dave Colliver.
> http://www.AshfieldFOCUS.com
> ~~
> http://www.FOCUSPortals.com - Local franchises available
>
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>
> Towards the bottom of this page
> http://homemetalshopclub.org/news/aug04/aug04.html is an article on
> grinding chuch jaws. The method seems to make some sort of sense.
>
> I have a Toledo TCT 15 Combimachine grinder (struggling to find any decent
> images, but look here
> http://www.wowowo.co.uk/top_products/5292/5292-30.htm about a 1/3rd way
> down).
>
> I need to somehow mount the grinder to my lathe in order to grind the
> jaws. My lathe is a boxford cud (4.5" center height). If I were to stick
> the grinder direct onto my compound slide (replace the toolpost), it will
> be about center height, but as the case is plastic and no flats on it, I
> am not sure how I would mount it.
>
> Looking for ideas (or if anyone has done something similar, perhaps some
> photos).
>
>
> On another note, when I can get it mounted, no doubt I could do
> cylindrical grinding... (I used to be a trained grinder before I joined
> the airforce). I would prefer to dress the wheel prior to grinding. I have
> a diamond dresser, any ideas how I would mount it in order to dress my
> wheel parallel?
>
> Thanks.
>
> Best regards,
> Dave Colliver.
> http://www.AshfieldFOCUS.com
> ~~
> http://www.FOCUSPortals.com - Local franchises available
>