Re: Eagle Suirface Grinder

On May 26, 12:06 pm, Peter Neill <panuno95-uk...@xxxxxxxxxxx> wrote:
On Mon, 26 May 2008 03:42:08 -0700 (PDT), the wizard

<ingen...@xxxxxxxxxxxxx> wrote:
Hi to all you knowledgable and helpful people,
Enough buttering up, is there someone out there with an Eagle surface
grinder. I bought one yesterday without handbook or grinding wheel,
but at a very advantageous price.
The question is, what size wheel is "standard" and for that matter
what grit/bonding mix.do I need for good finish on steel, The grinder
will not be used in a commercial time constraint situation, so stock
removal rates are less important than finish accuracy and appearence.
Suggestions as to where I can get a copy/scan/loan of the handbook,
anyone?
Thanks in advance.
T,W
,

Standard wheel size is 7" x1/2" x1.25" bore (180 x 13 x 31.75mm),
however if you want to use a thinner wheel, you will need to make a
new hub clamp disc, as on the Eagles these tend to be specific for the
width of the wheel - important to check.
Check the wheel rotation too, (should be anti-clockwise IIRC) as the
hub clamp is held on with a normal right hand threaded nut.

As for wheel grit types, there is as much debate here as the HSS vs
Carbide debate. In general, a harder steel needs a softer wheel, and
vice versa. A 46 grit size is a good general standard to start with,
in a 38A or WA (white alumdum) material in perhaps an H hardness.

Lots of good information direct from Norton in the following link:http://www.ind.nortonabrasives.com/Data/Element/Node/ProductLine/prod...
Do be careful if you're new to grinding though, as IMO a grinder can
be one of the msot dangerous machines in the workshop.
Small light cuts (0.003" is a large cut), don't feed too fast (or too
slow), and about 0.010"- 0.015" crossfeed will give a nice finish.
And always find the high-spots first before you index a grind across
the whole part.

IIRC the handwheel for feeding the knee is indexed in half thou'
divisions.

Peter

Cheers for that Peter, I knew interwebb would come in handy one day.
T.W.
.

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