- Joined
- Oct 13, 2010
- Messages
- 444
Please excuse my ignorance but what is the sander/grinder in the attached picture? Where can I get these? Thanks
Kaleb
Kaleb
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Disk sander
- Thread starter theflyingplatypus
- Start date
- Joined
- Oct 13, 2010
- Messages
- 444
I should be a little bit more specific. I am looking to find something that can go down to say 30rpm and up to about 1000rpm. The disk can be bought I know that but I am unsure about how to go about the rpm thing. I am not very good at electronics and all that, so simple is better for me. Thanks
Kaleb
Kaleb
Stacy E. Apelt - Bladesmith
ilmarinen - MODERATOR
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Knifemaker / Craftsman / Service Provider
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- Aug 20, 2004
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- 38,479
That is a slow speed disc sander, also called a lapping disc. The old Grizzly lapping/surface grinders pop up on ebay from time to time.
To make one use a motor with a gear reduction drive, and mount a 1/2 to 3/4" thick disc on it. The 12" disc is what costs, as it is lath turned to have a precision flat surface. A smaller unit can be made using a commercial 9" disc from Beaumont Knife supply (KMG), or any of the knife supplier catalog companies.
A variable speed DC drive motor will work,too. Ebay has both.
A unit can be made with a lot of versatility by using a 3PH motor and a VFD, which allows the unit to be used as a standard horizontal disc sander ( I couldn't live without mine), and to also be dialed down to dead slow to allow flat lapping of small folder blades and parts.
To make one use a motor with a gear reduction drive, and mount a 1/2 to 3/4" thick disc on it. The 12" disc is what costs, as it is lath turned to have a precision flat surface. A smaller unit can be made using a commercial 9" disc from Beaumont Knife supply (KMG), or any of the knife supplier catalog companies.
A variable speed DC drive motor will work,too. Ebay has both.
A unit can be made with a lot of versatility by using a 3PH motor and a VFD, which allows the unit to be used as a standard horizontal disc sander ( I couldn't live without mine), and to also be dialed down to dead slow to allow flat lapping of small folder blades and parts.