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1200 rpm bench grinder?

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Forum topic by woodnoobie posted 01-16-2010 08:56 AM 3184 views 0 times favorited 3 replies Add to Favorites Watch
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woodnoobie

5 posts in 2552 days


01-16-2010 08:56 AM

A few sources have recommended using a 1200 rpm bench grinder for sharpening. None have offered a manufacturer or model. Anyone have a recommendation?

The closest I’ve found are variable speed grinders with the slowest speed at 1725 rpm. These are Delta and Craftsman, which bear an eerie resemblance to one another.

http://www.amazon.com/dp/B0000B3AQQ/ref=asc_df_B0000B3AQQ994674?smid=ATVPDKIKX0DER&tag=googlecom09c9-20&linkCode=asn&creative=380341&creativeASIN=B0000B3AQQ

http://www.sears.com/shc/s/p_10153_12605_00921162000P

Anyone care to offer thoughts on the differences of having a 1200-1725 rpm vs. a standard 3400~ grinder?

Thanks!
Erik


3 replies so far

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Paul M Cohen

86 posts in 3240 days


#1 posted 01-16-2010 09:14 AM

I think you are looking for a 120 RPM or less grinder. Something like a Tormak which I think runs at 90 RPM.

-- Paul, Beaverton OR, www.TravelbyPaul.com

View SKFrog16's profile

SKFrog16

661 posts in 2662 days


#2 posted 01-16-2010 09:21 PM

If you already have a grinder, you may want to look at this website. Fine woodworking has quoted them, along with making the website a readers choice. This company offers stones for both 1725 and 3450 rpm as well as jigs to aid in sharpening your tools.
http://www.oneway.ca/sharpening/index.htm
There is a book offered by Taunton Press called Grind Perfect Edges Without Burning In just seconds, get a tool ready for honing
by Joel Moskowitz
This book explains how to use a higher speed grinder and jigs for sharpening.

-- Methods are many,Principles are few.Methods change often,Principles never do.

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TopamaxSurvivor

17664 posts in 3138 days


#3 posted 01-17-2010 01:08 AM

1725 and 3450 rpm are the standard motor speeds depending on whether it is 2 or 4 pole motor. Anything else will have to be gear driven to change teh speed or changed electronically. I don’t have any issues using a 1750 grinder for sharpening.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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