What size of contact wheel

alexmin said:
Does anyone knows if I can use standart KMG work rest with 10" wheel?(on KMG grinder of course)

Thanks,
Alex
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I'm not sure, but I'd be willing to bet that you can build an extension from an existing one, or Rob makes/or will make one that will fit.

At the time I got my Burr Kings, the rest was made for an 8" wheel only. I just fashioned an extension that bolted on to the existing arm and had a place for the workrest to bolt on further out. took me about 10 minutes to make it.
Of course, they now make workrests for the 10" wheel.
 
rfrink said:
Yep! It used to be the 8" as the most popular...but now I ship way more 10".

I can't stress enough....there are a million other useful ways to use a contact wheel ...other than hollow grinding. Contact wheels are much more efficient that the platen attachment. They require less hp and give you much better belt life. They remove material faster and easier with better finishes.

But they don't make things flat. So you still need the platen.
Click to expand...

Rob,

can you please list some uses for contact wheels other than hollow grinding and profiling. I need to have a rock solid base for justifying this purchace to my wife :)

Alex
 
Yes Rob, it seems I am under-utelizing mine. The more uses the better, no sarcasm.
Also, at the risk of hijacking the thread could someone answer my platen question please?;)

Mike
 
miden said:
Thanks rashid11.
On the subject of curved platens and platens in general, I have only used contact wheels, never a platen but I want to build one.
The platen is stationary though and the belt is moving pretty fast over it.

Obviously there has to be a heck of a lot of friction so the platen has got to wear down.

Of more concern is the fact that the belt will heat up too, will that not cause the join in the belt to let go?:eek:

Mike
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Yes there is a lot of friction especially if you press to hard.
Platen also wears down pretty fast. You have'll to resurface often. I use pyroceram glass glued to steel platen with doublestick tape. Pyroceram lasts much LONGER than bare stell plate. I never heard of joins breaking.
Other problem with platen that with finer grit belts join will "bump" when it hits platen
 
Ok,

much much fear in using platens in this forum I sense.
Afraid be not - it is greatly overstated.

In my home-made grinder, I use flat platens exclusively (just
never loved the hollow grind that much).

It works just fine and let me tell you, it's taken much abuse w/o many issues. I can hog some serious steel - like 1/4 outline against 36 grit,
same for flat grinds in 1 1/2 to 2 wide blades (kitchen-type). Never ever
did I break a belt or sensed much heat in it. If I put too much pressure,
I will slower my meager 3/4HP motor down. Belts simply wear out.





I welded the platen myself (just like the grinder itself). It is 3/16 HRS from Lowes or HD, 2" wide. On top of the metal, I glued a piece of ceramic
tile, again from HD or Lowes. Get them large enough - look for nice flat ones, with rougher backs and cut it to size. It helps a LOT to have the lift/right edges rounded - this way you can overhang the belt w/o it catching and then sky is the limit as to the complexity of outlines/shapes you can grind.

When I see ceramic is wearing out, I simply break it off, regrind the
metal backing plate, to get the glue off, and glue (liquid nails) a new piece. It is important to glue it on right. If it breaks off the backing plate,
the belt will drive it into the tracking roller and there will be damage
galore.

Here's the standard disclaimer: I am just a hobbyist. For a production setup
pyroceram is probably a better choice. I work mostly in 10xx or O1, higher
Cr steels might put a higher wear/tear on the belt.

On subject of belts: quality belts: 3M or Nortons, are a must.
They are increadibly tough, track very nicely. Norton ceramics (aka
Hogger) and 3M structured abrasives are most incredible.

I've also had very good luck with generic Norton belts I get @ McMaster.
Trugrit.com for everything else.
 
rashid11 said:
Ok,
much much fear in using platens in this forum I sense.
Click to expand...

That's downright humorous, considering 90% of the people who frequent here flatgrind. :D
 
For myself alone I speak, afraid I am not.
Unschooled I am, 'tis all, and an education I be seeking.
As for the hollow grind, I fear it not, except when at the ricasso side I grind, and use it for a sharpening tool!:D :D

Mike I am
 
miden said:
For myself alone I speak, afraid I am not.
Unschooled I am, 'tis all, and an education I be seeking.
As for the hollow grind, I fear it not, except when at the ricasso side I grind, and use it for a sharpening tool!:D :D

Mike I am
Click to expand...
aye I see you to do be an ole fart too and ay man after me own heart in the die and die trade.:D :thumbup:
.
.
.
.
I only know of being old
where I have 20:20 hindsight to use as a tool ..
to use the past to look forward to know what I have to do now.
,,to not to look back:eek: what a waste of time wev'e made of it...
:)
 
Hmm, I have a new 12" serrated contact wheel laying in my shop; never used it. You guys have me wanting to go and try it out now. ;) :)
 
Use it Danbo, I hear the serrated ones can make a thunderous noise when used properly.

Dan (Gray) yes, I am getting to the old fart stage, it is taking me all night to do what I used to do all night!:D
I am trying to wear the title with distinction tho, as a good old buddy used to say, getting older ain't for sissies!!;)

.....And the Force be with you all, and may the knifemaking gods smile upon your efforts.:D :D
 
miden said:
Use it Danbo, I hear the serrated ones can make a thunderous noise when used properly.

Dan (Gray) yes, I am getting to the old fart stage, it is taking me all night to do what I used to do all night!:D
I am trying to wear the title with distinction tho, as a good old buddy used to say, getting older ain't for sissies!!;)

.....And the Force be with you all, and may the knifemaking gods smile upon your efforts.:D :D
Click to expand...
:D sissies get old too but they must not hurt so much..
ye ole past doth catch up with thee.:)
 
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