grinder parts

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davburner

Joined
Aug 21, 2000
Messages
1
I have many questions so bear with me thanks.

I'm building my own belt grinder and was looking for rubber edged contact wheels.
I can only find one place that sells them
for about $150 for an 8 in. and $200 for 10in. Is this the going rate? Does anybody know where to get one for less?

I also have a 1hp 1750 rpm this should do right? Sould I have a belt pulley system
between the motor and contact wheel or can i mount the wheel right on the motor?
I planed on only having two wheels is this
ok or should i go with three?

Thank you and GOD bless us all

david sewell
 
david welcome there is a thread by rfrink on designing a grinder its here in the shop forum. this will cover alot of your questions and get you up to speed.

------------------
Laurence Segal www.RHINOKNIVES.com
 
hi
I agree with lurance, rob Frink
is building a grinder for a good price he is in the stages of it now,he does great work
and is working on contact wheel also
keep your eyes open
I am sure he will post it when it
is done, he is a great guy and does awsome work.
 
As far as the contact wheel goes, do not mount it directly to the motor, you may find that you won't have enough room on one side or the other to properly grind. Get some pillow block bearings and buy the round stock and have a machinist thread the end for you. Drive this shaft with the contact wheel mounted on it with a belt via the motor.

The price you quoted for a contact wheel is about the going price. Check with the follow folks and get a hardness of the rubber of 60 to 80 durometer. I prefer 60 myself but some folks like a harder wheel.
http://www.contactrubber.com/home.htm

I would use a rubber covered idler wheel as well. Check out Texas Knifemaker's Supply, they carry one. This will dampen the belt somewhat and make your machine smoother.

One mistake that folks make when mounting their pillow block bearings on a table is that the surface is not flat and the bearing are put in a bind causing vibration. One wayh around this is to first pour a thick epoxy like bedding compound or shaft epoxy and set the pillow block bearings on top of them. Of course make sure everything is lined up first. This will have a levelling effect. After the epoxy sets up (24 hours or so), drill your mounting holes and tighten the nuts and bolts. This is kind of how it is done in the compressor industry when setting a machine on the foundation. It keeps everything level and lined up with very little vibration.

Since you have the motor, you are well on your way, the contact wheel is the most expensive part. If you can, try to mount it on a metal table. It will tend to be more stable than on a wooden one.
 
Coote has 6-8-10" contact wheels. My 10" cost all of $60. Worth every penny
biggrin.gif

That was with one of his grinders though.
He advertises in Blade Magazine. Maybe someone has his phone #. He is a great guy and very helpfull. You might get some really good tips on building your grinder!
 
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