Hi all

Do any of you out there have any experience with grease selection of high load - low speed roller bearings, like in crane wheels?
I do have a problem with limited bearing-life.

Any recommendations from real life use, is highly appreciated.

Regards Lars

Hi Lars,

I do have experience with highly loaded, slow moving bearings on a Koppern roll press in a cement mill. The product used is a high viscosity grease containing graphite solids produced by Fuchs. The product is Stabyl HD.
Feel free to contact me with any questions.

Regard,
Henry

Not sure if it's available in Norway but Texas Refinery Corp. makes some really good grease. Their 880 Crown & Chassis Grease and Paragon 3000 Grease both have very good high load rating's. The 880 Crown & Chassis Grease was actually designed to lube the bearings on drilling rigs that support the weight of 2-3 miles of pipe in the ground.

Larse,

You may want to find a grease that has a high base oil viscosity, and also able to work at low temperature. Based on climate conditions in Norway, I may suggest to get some grease with a PAO base oil of a viscosity around 320 or 460 and a sound anti wear technology. Normal synthetic greases for low temperatures called "Arctic" are made with low base oil viscosities, so you will have to search well in the market.
Good luck.

quote:

Reply

Hi Larse, for Heavy Load slow speed bearing, normally following spec grease has proven successful since long in construction and heavy industries.
Specs;
Li or Li-Ca thickener
High Base oil viscosity of 1000 cst or more
Solid Lubricant combination of MoS2 and Graphite.

Carl Bechem Lubricant has got similar grease named High Lub FA 50 MO.

Pl. visit www.bechem.com to get contact details of nearest supplier.

Dipendra Jha
dipendra@bechemindia.com
0 93250 89751

In Sweden talk to Axel Christensen. They manufacture the grease you need.

Perhaps Mobilgrease XHP 322.

You can check the data sheet almost at any country´s mobil homepage.

larse,

What you may do is set the minimum requirements for base oil viscosity for grease (i.e. minimum 1000 cSt @ 40 degrees C), and Timken OK Load and Weld characteristics (i.e. 50 kg and 450 kg, respectively), and then try to find grease that meets those requirements. However, I would not advice you to look for a certain EP additive in grease, because by doing that you may limit your options. That way you can benefit from constant R&D programs of the grease manufacturers, where they are often breaking new grounds by discovering new and more effective additives chemistries.

Hi Lars,

Crane?
Grease is not the problem here, it is due to poor lubrication. In reality no one like to lubricate these lube points. Have you experienced to climb the topmost of unloader, doing acrobatic stunts to lubricate, I did that, so scary. You need automatic lubricators here, I have photo`s if you want to see.

Regards,
Danny

Thanks a lot for all info.
Conclusion so far, is that current grease is not very suitable for this application, and is going to be replaced.
Regards Lars

Hi

I think we have lubricated quite a few areas with very high loads, even shock loads, and low speeds with Molykote Longterm 2+. The mos2 (solids) help provide the emergency lubrication.

Also base oil viscosity is high.

You can pick up the data sheet at www.molykote.com

Hello all i would reccomend SE-100 grease its a calcium sulfonate grease that will take 600 F and a timken load of 75 or 80 its the best stuff we've ever come across its waterproof etc i just cant say enough about it and its at the best price we've ever found there a small family owned and operated company who sells the best grease i've ever seen at lower prices because there a smaller company without all the overhead costs etc STEWARD ENTERPRISE INC in APPLETON WI usa 800-569-6845 www.stewardenterprise.com ask for james steward

quote:

Originally posted by Satish Agrawal:
Hi

I think we have lubricated quite a few areas with very high loads, even shock loads, and low speeds with Molykote Longterm 2+. The mos2 (solids) help provide the emergency lubrication.

Also base oil viscosity is high.

You can pick up the data sheet at www.molykote.com

try also the stabyl hd from fuchs lubritec

Please Try STABYL HD OR RENOLIT FLM1002 FROM FUCHS - THEY ARE GOOD

I use Royal Purple Thermax with great success in these applications (High load with RPM under 500).