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#3313303 - 03/16/14 04:39 AM Moly Grease
bogan Offline


Registered: 10/08/11
Posts: 42
Loc: Australia
Hello Guys,

Can I use automotive moly grease on my bottom bracket and skewers?

I have Lithium grease here but I like the thickness of the moly grease...

What do you guys think??

Cheers Greg. smile

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#3313306 - 03/16/14 04:51 AM Re: Moly Grease [Re: bogan]
Olas Offline


Registered: 12/11/13
Posts: 1065
Loc: Manchester, England
Use with confidence smile

I moly my cars, bikes, guns, even my fridge door!!

moly is the goodness
_________________________
1982 VW Scirocco
1457cc
98 bhp
78000 miles
Redline fluids
Mann/Mahle filters

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#3313314 - 03/16/14 05:54 AM Re: Moly Grease [Re: Olas]
bogan Offline


Registered: 10/08/11
Posts: 42
Loc: Australia
Thanks....

I see all this Park tool grease and shimano grease..

I thought my black moly grease would do just a good job ,if not better..

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#3313320 - 03/16/14 06:20 AM Re: Moly Grease [Re: bogan]
Olas Offline


Registered: 12/11/13
Posts: 1065
Loc: Manchester, England
between moly, lithium and copper grease there's nothing I wouldn't lube up. ask my girlfriend wink
_________________________
1982 VW Scirocco
1457cc
98 bhp
78000 miles
Redline fluids
Mann/Mahle filters

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#3313331 - 03/16/14 06:48 AM Re: Moly Grease [Re: Olas]
bogan Offline


Registered: 10/08/11
Posts: 42
Loc: Australia
looool smile

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#3314403 - 03/17/14 12:54 AM Re: Moly Grease [Re: bogan]
Surestick Offline


Registered: 09/10/08
Posts: 71
Loc: Quebec, Canada
I believe you have to be careful with lithium and moly greases with plastics so keep it off your suspension and out of your shifters.

You might want to find something else to lube your seatpost with before insertion too - You are looking for waterproofing and corrosion protection there, not friction reduction (as anyone who's ever had to resolve slipping seatpost issues will tell you). More of an issue on mountain bikes with a QR clamping the seatpost instead of a bolt but still...

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#3314493 - 03/17/14 05:31 AM Re: Moly Grease [Re: bogan]
bogan Offline


Registered: 10/08/11
Posts: 42
Loc: Australia
Good point
Cheers.

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#3315559 - 03/18/14 07:38 AM Re: Moly Grease [Re: bogan]
miro Offline


Registered: 05/05/13
Posts: 75
Loc: the Netherlands
You have to keep in mind that we are living in Moly hype era. Yes Molibdenium difulfide and liquid form of moly are fantastic AW and EP additive in today high demining lubrication.
Unfortunately no one is perfect. E.g try to use moly in high speed rolling/ball bearing application and look what happen.
Back to the topic, The bicycle bearings are low demanding application Low speed, very low loads, temperature doesn’t exceed 40…42C.
Water washout and corrosion protection are number one requirements.
Personally I have tried Moly grease for bike but I don’t like the dark color. I use Mobil products as Mobil SHC 100, 220 and XHP 222.
Only place where I still use moly in bike is my chain. I stove my moly mixturer at T=100C for my race and trekking bikes. In this we have dry lubrication and I have consciously choosen moly – not because it is hype and everybody use it.


Edited by miro (03/18/14 07:42 AM)

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#3315771 - 03/18/14 12:15 PM Re: Moly Grease [Re: bogan]
UG_Passat Offline


Registered: 05/27/08
Posts: 1158
Loc: NJ
I just use marine grade grease (which is made for wheel bearings) as my primary grease, from the QR axles to lubing my speedplay pedals on my road bike

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#3315881 - 03/18/14 02:32 PM Re: Moly Grease [Re: UG_Passat]
miro Offline


Registered: 05/05/13
Posts: 75
Loc: the Netherlands
Originally Posted By: UG_Passat
I just use marine grade grease (which is made for wheel bearings) as my primary grease, from the QR axles to lubing my speedplay pedals on my road bike

That is one of the best bicycle grease


Edited by miro (03/18/14 02:33 PM)

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#3316197 - 03/18/14 08:00 PM Re: Moly Grease [Re: miro]
Surestick Offline


Registered: 09/10/08
Posts: 71
Loc: Quebec, Canada
Originally Posted By: miro

Back to the topic, The bicycle bearings are low demanding application Low speed, very low loads, temperature doesn’t exceed 40…42C.
Water washout and corrosion protection are number one requirements.


Given the bearing issues people have with bikes, especially bottom bracket bearings I'd disagree... To a point.

True, the temps are low but the demands on performance of the bearings in terms of weight, low drag and packaging are high.

Bikes, especially mountain bikes function in a dirty environment where the requirements of good sealing and low drag conflict. Additionally weight and the need to fit bearings in parts that meet certain size standards seem to mean that bikes sometimes end up with either poorly sealed bearing or bearings undersized for the load. Maintenance, of course, is a factor but who wants a BB or hubs you have to rebuild every week.

I'm surprised we don't see more bike parts with grease injection ports. I believe Suntour used to make hubs but otherwise nothing.

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#3316617 - 03/19/14 08:33 AM Re: Moly Grease [Re: bogan]
UG_Passat Offline


Registered: 05/27/08
Posts: 1158
Loc: NJ
More and more loose bearing components are being replaced by cartridge bearings (with appropriate dust/grease seals), which would negate the need to disassemble the bearing assembly, clean them and relube them.

Shimano is still be big proponent of the loose bearing/cone assembly for their wheels though.

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#3317099 - 03/19/14 02:52 PM Re: Moly Grease [Re: UG_Passat]
Surestick Offline


Registered: 09/10/08
Posts: 71
Loc: Quebec, Canada
Originally Posted By: UG_Passat
More and more loose bearing components are being replaced by cartridge bearings (with appropriate dust/grease seals), which would negate the need to disassemble the bearing assembly, clean them and relube them.

Shimano is still be big proponent of the loose bearing/cone assembly for their wheels though.


You can still pick the seals off with a dental pick, re-grease them and push the seals back in place.

The big advantage of cartridge bearings is they take the unskilled user out of the loop so the bearings aren't adjusted too loose or tight and damaged.

There is still the trade-off of effective sealing vs. seal-drag.

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#3317195 - 03/19/14 04:37 PM Re: Moly Grease [Re: bogan]
miro Offline


Registered: 05/05/13
Posts: 75
Loc: the Netherlands
Lets put some numbers
300kg do you thinkthat this is demanding application for Bb
3w are losses in pedal,bb and whell
Around 11w in chain
30....80w in rolling wheel at 30kmh

I use SKF bb, I have made 20000km on it, world cyclist reports 100 000 average, bb has huge warranty time, price 100.120 euro....200$

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#3317569 - 03/19/14 10:28 PM Re: Moly Grease [Re: miro]
Surestick Offline


Registered: 09/10/08
Posts: 71
Loc: Quebec, Canada
How much maintenance have you have to do over the 20K Km you have on your BB.
How much maintenance to reach 100K Km?

If you had to service your car's wheel bearings as frequently would you not begin to think they might need a more robust design?

Their life is hard, as I stated, due to the conflicting requirements put on them of low drag, dirty environment and weight. You even said that "Water washout and corrosion protection are number one requirements". Designing a bearing that can take the weight & power output of a cyclist isn't hard. Designing one that will fit in one of the current BB standards, be sealed well enough to last and still spin with minimum drag from the seals takes a bit more thought (and the resulting product will require some extra care from the end-user, no spraying a hose directly at the bearings when cleaning the bike for example).

If 3 Watts for a BB (assuming that's correct, I don't know where you got your figures) is nothing why are ceramic bearings for hubs, bottom brackets and even derailleur pulleys selling?

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