Butter problem

I’ve never seen blue lubricant. I’ve seen black ones, which are said to be heat-resistant, but I’m not aware of their exact composition or standards. We use them not for lubricating machine pumps, but rather for lubricating the gaskets of valves that are exposed to high temperatures. All those seen for use in mechanical pumps are yellow lithium-based greases, in accordance with GB/T 7324-2010 for general-purpose lithium-based greases

I think your question isn’t specific enough; you should first specify parameters such as the medium, operating temperature, working environment, and so on, in order to determine which type of grease to use. For ordinary applications, a lithium-based molybdenum disulfide grease will suffice, but in high-temperature environments, a heat-resistant grease is needed – the choice should be based on the grease’s dropping point and other properties.

It is usually a lithium-based molybdenum disulfide grease, but there are different grades available; choose the one that suits your temperature, speed, and other conditions

It’s the bearings of our ordinary motors – what type of grease do you use to lubricate the motors during regular maintenance?

It’s the ordinary motor we use; it’s the grease that is applied to the motor during regular maintenance

It’s just an ordinary motor; the grease that is applied during regular maintenance

This post was last edited by “Never be mediocre” on November 8, 2016, at 18:42. For our motors, we generally use the 3kg/bucket multi-purpose general-purpose grease, Bayi TBB1220-2002. It is yellow in color and is suitable for lubricating and protecting ground-based weapons and equipment such as artillery, shells, radars, directors, and **vehicles** operating within a temperature range of -50 to +180 degrees Celsius. It can replace general-purpose artillery grease as well as greases used for automotive and artillery bearings. Blue usually indicates a high-temperature grease; the blue color is simply a dye added to it. Possible models include: Zhongri Grease HP, Great Wall 7025, fully synthetic high-temperature grease, and fully synthetic grease suitable for both high and low temperatures, PHB71-461. High-temperature greases are not necessary for applications that don’t involve high temperatures – it would be a waste of money

For the 3rd and 5th floors, is molybdenum disulfide generally used? ? ? Let’s first clarify the difference between molybdenum disulfide and lithium-based greases. What is known as molybdenum disulfide grease is actually just lithium-based grease to which a certain proportion of molybdenum disulfide has been added. Lithium-based yellow grease is simply ordinary yellow grease without the addition of molybdenum disulfide. Lithium-based greases with molybdenum disulfide added to them experience a significant increase in their operating temperature; the higher the content of molybdenum disulfide, the higher the operating temperature possible. Butter containing 5% molybdenum disulfide can withstand temperatures of up to around 200 degrees Celsius, whereas regular butter can only handle temperatures of around 100 degrees Celsius. This means that ordinary lithium-based greases start to flow at working temperatures of around 100 degrees; if greasing is not done promptly, the components are prone to wear. However, greases containing molybdenum disulfide do not start to flow until temperatures reach 200 degrees, so the frequency of greasing required is much lower, typically 1:5 or better. However, the price is proportional as well; the higher the content of molybdenum disulfide, the higher the price. Yellow grease containing 3% molybdenum disulfide costs five times as much as regular yellow grease. What is molybdenum disulfide added to bearings for? Can withstand over 200 degrees? What’s the point? How high a temperature can a bearing withstand, man? At 100° it starts to smoke, and the bearing gets burned out. It’s not that you can’t add it, it’s just a waste, you know? It’s like buying a Mercedes to use for driving for Uber. Additionally, molybdenum disulfide is black, while regular butter is yellow. During inspection, it’s clear at a glance: even though butter was applied, it turned black, which indicates that the bearing is damaged and should be replaced ； The other one is black; how can you tell which one is good and which one is bad? Some wear is very subtle, and it may seem fine to the eye, but would you dare to use an old bearing? What if it’s a very important device? It takes half a month to order new bearings. Should we wait for them or use the old ones? Who dares to make the decision? If you’re using butter that’s dark in color, take a photo of it and show it to your supervisor; they will then know that the bearings are no longer in good condition.

The main function of molybdenum disulfide in friction materials is to reduce friction at low temperatures and increase it at high temperatures; it has a low loss on ignition, and is volatile in friction materials. It’s not accurate to say that adding molybdenum disulfide is solely for improving heat resistance – that’s a generalization. Furthermore, it is necessary to determine whether the cost of molybdenum disulfide or equipment stability is more important; how much extra maintenance cost do thousands of machines in a factory incur each year due to poor lubrication? Furthermore, the service life of better-quality lubricants also differs from that of bearings. To determine whether the bearing is damaged and needs to be replaced, if one has to wait for management to decide based on its color, and if even such basic causes of failure cannot be analyzed properly, then that organization is surely on the verge of collapse. Also, please clarify the concept: flow begins at 200 degrees, and 200 is already above the dropping point of lithium molybdenum disulfide grease. Also, aside from smaller motors, grease lubrication is generally not used in very important applications, I guess. Maybe I’m not well-informed, or perhaps the critical equipment I’ve seen is of extremely high quality and sophistication – those mining machines and fans are indeed important devices! ! ! Are you in a remote mountainous area? It takes half a month to buy a bearing – are there no standard bearings available in the market right now? Oh, right – you might be large state-owned enterprises or central state enterprises that strictly adhere to regulations; you need to go through OA and ERP systems, obtain approvals from managers, and conduct bidding processes as well. A bearing costs a few hundred yuan – is that enough to cover your electricity bills, paper costs, and other office expenses? You have no connection whatsoever with the suppliers; you don’t even go to the trouble of providing a bearing first and then handling the paperwork later – such integrity is truly admirable and deserves respect! I can’t afford a Mercedes, nor do I drive Didi; I just know that using molybdenum disulfide is the right choice. This forum is for exchanging technical knowledge, not for mocking people. If you are skilled, you can show it off, but please also respect others’ views, even if they aren’t entirely correct. It’s not your business whether someone understands or not; our leaders don’t say such things either. Who do you think you are?