Lubing Leaky Faucets

The alarm jolts me from my slumber…no wait, it’s my daughter shaking me to tell me the faucet is leaking. Been in my home 13 years, yep, that’s about right for plumbing repairs to start kicking in. Just as we age, O-rings can age and dry out if they don’t have the proper lubricant. When plumbing fixtures and faucets need replacing, existing valve stems are usually removed so that new parts can be installed. The repair work is much smoother if a high quality plumber’s grease is used, like PST-599. PST-599 is used by leading faucet manufacturers for O-rings in faucet cartridges. The reason it is widely used by plumbers is that PST-599 is NSF Certified, Standard 61 Approved for drinking water. Plumber’s grease, like PST-599, outperforms standard greases in preventing water washout and withstanding high temperatures up to 400F degrees. So for that next home plumbing project, be sure to get a high quality plumber’s grease for ease of installation and repair. And remember, G-MAN™ always hits the spot.

Starter Motor Grease- what kind of grease do I need?

Vortex blasts, bitter cold temperatures, snow storms, and cars that don’t start…the joys of winter. These extreme conditions can really cause havoc on starter motors if they are not lubricated with the right starter motor grease. Greases are typically comprised of a base oil, thickening system, and additives. Older technology greases that utilize mineral (crude-based) stocks are becoming less desirable for use in rotating electrical applications, such as starter motors.

Today’s starter motor grease needs to be effective in cold temperatures without thickening, and operate in high temperatures without losing its lubricating base oil. Synthetic and silicone greases have a much wider operating range than conventional greases. PolySi® G-MAN™ Lubricants’ PST-433 Extreme Low Temperature Grease has long been the lubricant chosen by OE’s (original equipment manufacturers) and starter motor rebuilders. G-MAN™’s PST-433 can operate down to -60℃ without any signs of performance failure. When it’s hotter than blazes outside, PST-433 handles 400℉ (204℃) with ease.

So to avoid the car that seems as frozen as the treetops in a winter storm, or an overheated car in the height of summer, be sure you have a high quality lubricant in the starter motor.  And remember, G-MAN™ hits the spot every time.  For more information, please visit http://www.polysi.com.

Brake Grease Blues; What is important in a Brake Grease?

During my morning commute to work, I idled up to a stop light only to hear a very nice sports car making a loud SCREECHING noise as it rolled up next to me. Wow, screeching brakes on a hot car really kills a look. That screeching noise was from brakes in need of the right grease. Now that may not sound right, grease on brakes, but it does if you understand how brakes are put together.

Grease never should not come in contact with the braking surface, but there are multiple greases used on brake units. A grease which prevents that awful screeching sound on brakes is G-MAN™ PST-477 by PolySi® Lubricants. G-MAN™ PST-477 is used on the BACK of the brake pad, between the brake pad and the metal shim. The metal shim rubbing on the brake pad is where the awful screeching sound is derived. By putting G-MAN™ PST-477 between the brake pad and the metal shim, noise is eliminated.

Will any grease work on brakes? NO! Your brake grease has to contain a solid lubricant. Brake pads generate extreme heat that can dry out brake grease, so what is left behind is the most important ingredient. G-MAN™ PST-477 has a superior solid lubricant additive package that leaves behind a coating between the shim and the brake pad. The solid lubricant actually burnishes into the metal surface, leaving a protective coating that lubricates the metal surface, and eliminates squeaking.

So, the next time you have a brake job, be sure you use G-MAN™ PST-477 lubricant, because G-MAN™ hits the spot every time.  And remember, G-MAN™ hits the spot every time. For more information, please visit http://www.polysi.com.

Lubrication Basics; How Greases Work

How Lubricants Work

Lubricants are designed to control friction and wear between two solid surfaces that are moving. This is done by varying degrees of physical separation of the surfaces, combined with chemical action at the surfaces, often referred to as boundary lubrication. Lubrication engineering is the process of selection and design of lubricants to function in a specific application or group of applications.

The contact zone is the area or space where two surfaces come together in motion. In elastohydrodynamic (EHD) conditions, the two surfaces are separated by the lubricant. EHD is achieved if the combination of speed and fluid viscosity are enough to overcome the normal load acting on the two surfaces. If the conditions are not sufficient to be in EHD, boundary contact occurs in a greater degree until the load is no longer supported by EHD forces, but by a boundary contact alone.

Lubricants come in many forms. Solid lubricants are solids that tend to reduce friction and wear in a contact. Polytetrafluoroethylene (PTFE) and polyethylene are solid lubricants that work due to a low coefficient of friction between the solid lubricant and the surfaces they separate. Molybdenum disulfide, graphite, and hexagonal boron nitride (hBN) are solids that are constructed of stronger layers that are connected weakly to each other. This structure reduces friction as the layers slide.

Liquid lubricants are composed of base oil, a blend of oils, or an emulsion. They may have additives that are soluble or dispersible in the liquid. A liquid lubricant can have a colloidal dispersion of a solid lubricant that is held in suspension. Liquid lubricants become less viscous with increasing temperature. Viscosity Index is one number that is calculated to quantify to what degree a liquid changes with respect to temperature. Liquids become more viscous under increasing pressure. These properties are important when selecting a lubricant to function in an application where the contact temperature and pressure can be very high.

Semisolid lubricants are most commonly referred to as greases. They are formed when liquid lubricant is gelled making the mixture non-Newtonian. This means that the observed or apparent viscosity of the lubricant changes depending on the amount of shear. In general, as shear rate increases, apparent viscosity decreases. Shear stability describes the ability of grease to regain its consistency after being subjected to shear. Solid lubricants are often added to grease as semisolids allow for stable suspension of incorporated solids. Additives can be dissolved or dispersed into lubricants. Additives can improve thermo-oxidative stability, friction and wear characteristics, corrosion prevention, and load carrying.

Lubricant Selection and Design

Many factors can be considered when selecting or designing a lubricant to perform in an application. The materials that come into contact are an important input. In boundary, friction is the result of load acting on two surfaces in contact due to plastic and elastic deformation of asperities on the surfaces. The area of real asperity contact increases with load. Contact between two hard surfaces results in low area and high contact pressure. If one or both of the surfaces is soft, the pressure will be lower. For instance, silicone based lubricants tend to not carry loads well and are not recommended for many metal on metal contacts. The operating environment is another important input. The temperature and exposure to oxygen, debris, dirt, moisture, and other factors can greatly affect how a lubricant performs. The duration that the lubricant must work is also part of the operating environment.

The cost of lubrication is not just the unit cost of the lubricant. Cost is also a function of the amount of lubricant needed for the application over a set period of time. If a lubricant lasts longer or less is needed, input, repair and warranties costs are reduced. Packaging and delivery method are often overlooked inputs. A central lubrication system or automated lubrication system can restrict the kind of lubricant that can be used. Package size, type, and material can affect the selection or design of a lubricant. PolySi® G-MAN™ Lubricants is uniquely qualified to assist client’s in selecting the right lubricant for their application. Our chemists and experienced sales staff can work with you from design to implementation. Call today to discuss your lubrication needs.  And remember, G-MAN™ hits the spot every time.