black grease uses
#1
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black grease uses
Hello , i got as a gift a little bucket of black grease plus the mini-dispenser. Since i already own a couple of different types (blu grease, lithium and silicon), for what specific purpose the black one seems to be the best choice (bike related ofc)?
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You won't have to clean as often as it will not show up as badly on a black groupset and hubs or a black frame.
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What a ridiculous thing to say.
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#4
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( Warning : Aussie spelling ahead ).
Typically the black greases I have bought over the years have been that colour due to the presence of the chemical molybdenum disulphide ( "moly" ). This is a particularly low friction substance so these greases are more "slippery". A very common application is in constant velocity joints in autos. ( Though I would imagine graphite containing greases are also black / grey. )
I would suggest it's not going to make a lot of difference to the average mechanic whether you use this or not. Just use it wherever you might use a regular grease. I once read that it should not be used in ball and roller bearings as the theory was it was so slippery that the balls or rollers would slide instead of roll on their tracks, hence ironically increasing bearing wear. Nowadays I am not so sure if this wasn't an old wives tale. You would need an engineering analysis to determine that.
Speaking of which, here is a fascinating piece of history ( for mechanical engineers, which I am not ) from NASA ( or the organisation which preceded it perhaps ). .pdf at bottom.
Seeing the typed pages is quite poignant ( to me anyway ).
https://ntrs.nasa.gov/citations/19930086694
Edit: Upon reflection, personally, I would (still) NOT use moly grease in ball or roller bearings or on seat-posts, but don't know in practice whether it would matter. I WOULD use it on any plain bearing / sliding ( metal ) surfaces, like brake lever and derailleur pivots.
Typically the black greases I have bought over the years have been that colour due to the presence of the chemical molybdenum disulphide ( "moly" ). This is a particularly low friction substance so these greases are more "slippery". A very common application is in constant velocity joints in autos. ( Though I would imagine graphite containing greases are also black / grey. )
I would suggest it's not going to make a lot of difference to the average mechanic whether you use this or not. Just use it wherever you might use a regular grease. I once read that it should not be used in ball and roller bearings as the theory was it was so slippery that the balls or rollers would slide instead of roll on their tracks, hence ironically increasing bearing wear. Nowadays I am not so sure if this wasn't an old wives tale. You would need an engineering analysis to determine that.
Speaking of which, here is a fascinating piece of history ( for mechanical engineers, which I am not ) from NASA ( or the organisation which preceded it perhaps ). .pdf at bottom.
Seeing the typed pages is quite poignant ( to me anyway ).
https://ntrs.nasa.gov/citations/19930086694
Edit: Upon reflection, personally, I would (still) NOT use moly grease in ball or roller bearings or on seat-posts, but don't know in practice whether it would matter. I WOULD use it on any plain bearing / sliding ( metal ) surfaces, like brake lever and derailleur pivots.
Last edited by redshift1; 04-13-22 at 05:45 PM. Reason: Add info.
#5
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Do not judge by the color of the grease, but by the contents on the label.
I guess if you want to tar & feather someone and happen to be out of tar?
I guess if you want to tar & feather someone and happen to be out of tar?
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If it is the SuperWeb grease it is typically a very sticky grease for heavy usage. I think they recommend it for bearings but it will really stain and stick around. However like cxwrench said we have no idea what it is other than giving us color. Pretty typical around here though "I have stuff and what is it"
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Typically the black greases I have bought over the years have been that colour due to the presence of the chemical molybdenum disulphide ( "moly" ). This is a particularly low friction substance so these greases are more "slippery". A very common application is in constant velocity joints in autos. ( Though I would imagine graphite containing greases are also black / grey. )
I would suggest it's not going to make a lot of difference to the average mechanic whether you use this or not.
I would suggest it's not going to make a lot of difference to the average mechanic whether you use this or not.
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Go as a singing minstrel during Halloween or if you simply want to be "cancelled."
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Last edited by easyupbug; 04-14-22 at 10:48 PM.
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( Warning : Aussie spelling ahead ).
Seeing the typed pages is quite poignant ( to me anyway ).
https://ntrs.nasa.gov/citations/19930086694
Seeing the typed pages is quite poignant ( to me anyway ).
https://ntrs.nasa.gov/citations/19930086694
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Nice recap on grease for anyone really interested:
EVERYTHING YOU NEED TO KNOW ABOUT GREASE
EVERYTHING YOU NEED TO KNOW ABOUT GREASE
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Virtually all bearings on a bike are low speed high load bearing. The headset being the one with high pressure high impact. IMO they should all have heavy sticky grease. Your "black" grease as someone mentioned probably is moly grease with a heavy base, and would be fine for the bike.
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I once read that it should not be used in ball and roller bearings as the theory was it was so slippery that the balls or rollers would slide instead of roll on their tracks, hence ironically increasing bearing wear. Nowadays I am not so sure if this wasn't an old wives tale.
#18
Newbie
I have tubs of grease from various sources that come with recommendations that seem virtuous but ultimately do not apply to me.
For example - the very expensive high temp red grease - great, but no application for me.
I have looked at my requirements and they are constant use in rainy conditions in a high salt environment. So I use marine prop grease for all bearing applications and ACF-50 for exposed moving parts and surfaces.
That said, I don't apply and forget - I regularly inspect, repack and regrease/reapply.
My bike is silent, shiny, and efficient at all times.
For example - the very expensive high temp red grease - great, but no application for me.
I have looked at my requirements and they are constant use in rainy conditions in a high salt environment. So I use marine prop grease for all bearing applications and ACF-50 for exposed moving parts and surfaces.
That said, I don't apply and forget - I regularly inspect, repack and regrease/reapply.
My bike is silent, shiny, and efficient at all times.
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