Table saw-> disc sander conversion question


I have read most of the messages about converting a (belt-driven) table saw to a disc sander. I have an older saw collecting dust in the corner (it's worthless as a table saw) and am considering one of the sanding discs for infrequent use. I expect it to ruin the saw or arbor bearing over time. I could care less.
The thing I am not clear on is RPM. My motor turns at 3450. The grizzly disc sander says it turns at 3450.
What should the disc spin at? It's just a pulley choice. The messages about the saw turning too fast and burning up wood don't seem clear. I assume this is because people are using the same pulley ratio as they were with the saw blade, which is faster than 3450?
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snipped-for-privacy@yahoo.com (in snipped-for-privacy@g47g2000cwa.googlegroups.com) said:
| I have read most of the messages about converting a (belt-driven) | table saw to a disc sander. I have an older saw collecting dust in | the corner (it's worthless as a table saw) and am considering one | of the sanding discs for infrequent use. I expect it to ruin the | saw or arbor bearing over time. I could care less. | | The thing I am not clear on is RPM. My motor turns at 3450. The | grizzly disc sander says it turns at 3450. | | What should the disc spin at? It's just a pulley choice. The | messages about the saw turning too fast and burning up wood don't | seem clear. I assume this is because people are using the same | pulley ratio as they were with the saw blade, which is faster than | 3450?
Saw speed works for me. I did burn some oak on the first try; but a little care goes a long way toward eliminating that problem. Worry about the pulley ratio if/when you decide the speed is actually a problem.
-- Morris Dovey DeSoto Solar DeSoto, Iowa USA http://www.iedu.com/DeSoto/solar.html
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Morris Dovey wrote:

Just take care and regulate your pressure and you should be cooking with gas :) John
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How do you get a saw to collect dust? People spend a lot of money on other machines to do that - my saws just seems to produce dust.
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You can slow down the burn rate and or surface speed by simply sanding closer to the center of the disk rather than the outer edge.
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