Crocus cloth substitute????

mickyd · Post by **mickyd** » Sun Feb 15, 2009 6:58 pm

Can't locate any crocus cloth here in San Diego. Nick's sawdust session 22

http://www.shopsmithacademy.com/SS_Arch ... rn_Pt2.htm

discussed using it as the final step for preparing the tubes after scothbriting and 600 grit wet/dry sandpaper.

Can anyone recommed a substitute? I was going to use some 1800 grit wet/dry sandpaper instead but wanted to get some opinions in.

horologist · Post by **horologist** » Sun Feb 15, 2009 9:19 pm

1800 is much too fine. When we cleaned my way tubes we used 320 for the bad bits and 400 overall. This matched the factory finish very nicely. If you go in stages from 600 to 1800 you will have a near mirror finish which will be prone to scratching and I expect the carriage lock will slip. I think a little surface roughness is needed to ensure a good grip.

Troy

mickyd · Post by **mickyd** » Thu Feb 26, 2009 1:35 pm

horologist wrote:1800 is much too fine. When we cleaned my way tubes we used 320 for the bad bits and 400 overall. This matched the factory finish very nicely. If you go in stages from 600 to 1800 you will have a near mirror finish which will be prone to scratching and I expect the carriage lock will slip. I think a little surface roughness is needed to ensure a good grip.

Troy

horologist....wet sand or dry sand?

Maybe Nick can share his thoughts on his process of scotchbrite, 600 wet sand, 1800 crocus.

8iowa · Post by **8iowa** » Thu Feb 26, 2009 4:29 pm

Mike:

since I helped Horologist clean up his bench and way tubes I know what he is talking about.

However. if you would like to obtain a supply of crocus cloth try McMaster Carr; http://www.mcmaster.com/#crocus-cloth/=rvtbf

wood_butcher · Post by **wood_butcher** » Thu Feb 26, 2009 5:26 pm

Found similar material at Auto zone or auto supply houses.

horologist · Post by **horologist** » Sat Feb 28, 2009 1:14 am

mickyd wrote:horologist....wet sand or dry sand?

Maybe Nick can share his thoughts on his process of scotchbrite, 600 wet sand, 1800 crocus.

Mike,

Wet sand. I chucked one end up in a four jaw chuck on a lathe and held the other end by hand with a wadded up piece of towel. 8iowa did the sanding. The finish is identical to the factory finish.

I have a series of lapping plates, glass plates with abrasive paper glued on. To achieve a "black polish" I work through the grades to 2000 grit and then use green rouge. This is a finish that is mirror like and under certain lighting conditions the metal appears to be black instead of the bright silver. The photo below is an example. This sort of finish would be overkill, difficult to maintain, and probably would impair the function of the carriage locks.
In my opinion anything finer than 400 or 600 grit is counterproductive.

[ATTACH]3390[/ATTACH]

mickyd · Post by **mickyd** » Sat Feb 28, 2009 10:10 am

Troy,

Interesting info on the black polish.

You have a photo of your SS? I'd to see it.

horologist · Post by **horologist** » Sat Feb 28, 2009 11:04 pm

mickyd wrote:Troy,

Interesting info on the black polish.

You have a photo of your SS? I'd to see it.

Mike,

Here is a closeup of a way tube. Don't pay too much attention to the dust. My Shopsmith was basically never used and after spending 10 years in a Florida barn had a few corrosion issues. The rust was only deep in a few spots and there is still some pitting there. The rest cleaned up nicely.

Troy

[ATTACH]3393[/ATTACH]

charlese · Post by **charlese** » Sun Mar 01, 2009 1:38 am

Troy, your tube looks better than mine which has never been rusty. Mine shows minor scratch marks from movement of the headstock and carriage.

mickyd · Post by **mickyd** » Sun Mar 01, 2009 5:46 am

horologist wrote:Mike,

Here is a closeup of a way tube. Don't pay too much attention to the dust. My Shopsmith was basically never used and after spending 10 years in a Florida barn had a few corrosion issues. The rust was only deep in a few spots and there is still some pitting there. The rest cleaned up nicely.

Troy

[ATTACH]3393[/ATTACH]

Wow....impressive. Can't wait to work on mine. Took mine (bench tubes) out of the electrolysis bath late last night. Mine were pretty rusty but they looked like they cleaned up real nice.

I'll be hitting them with sandpaper (320 grit) early AM to get the residual electrolysis staining off them. I'll post some pics of the before and after.