To work properly, this page requires JavaScript to be enabled or to use the most recent versions of Google Chrome, Safari, or Firefox. 1996-2023, Amazon.com, Inc. or its affiliates. You will be redirected once the validation is complete. The service requires full cookie support in order to view this website. DOT grease for sticky pistons? | Mountain Bike Reviews Forum I don't think the grease will effect the seals, but the DOT will break down the grease more easily, and in turn can eventually start breaking down the seals. Learn more about grease and how it is formulated. The explanation was that the leaking greasediluted the open gear lubricant to the extent it changed its character and properties. Elastomers. Soaps made from simple lithium and calcium were compatible with each other, but not compatible with clay. Montagefett fr hydraulische Scheibenbremsen (zuvor als DOT-Montagefett bezeichnet) ist ein spezielles SRAM-Fett, das sowohl mit Minerall- als auch mit DOT-Bremssystemen kompatibel ist. Change description. Location. Additive compatibility with the metallurgy of the lubricated component must also be considered. This can often be done by dispensing the new grease into the space, where it will displace the old product. In bygone days, when simple soaps and clay were the primary thickener types, compatibility was relatively straightforward. Simply mixing two greases together to observe changes may not provide any obvious difference. This potential effect is not easily determined. This includes employees and contractors who may be working in the facility. The conditions observed are noted, and the grease is removed from the bearing. horsebacon 3 yr. ago I. DOT-Schmierfett wird auf das Sttzhlsengewinde aufgetragen. SRAM Montagefett fr hydraulische Scheibenbremsen (ehemals DOT-Montagefett) ist ein Schmierfett, das zur Montage von hydraulischen Scheibenbremsen von SRAM verwendet wird. A typical grease compatibility chart is shown in Figure 1. Required fields are marked *. Try to completely remove all of the old grease before applying new grease if a grease change is required. Chemical Compatability | Rubber | Elastomer - Hi-Tech Seals Inc. Dies sorgt fr eine knickfreie Hydraulik-Bremsleitung und einen freien Durchfluss. Beim Einbau von SRAM Sttzhlsen in die Innenhlle der Hydraulikbremsleitung schneiden wir ein Gewinde in die Leitung selbst. Somehow, though, these critical parameters are overlooked when utilizing grease compatibility charts. BUT---you can pick up some SilGlyde in a packet for $2 at AutoZone, which is allegedly DOT-compatible. The tests that are conducted should be agreed upon between the user and grease supplier to assure that the properties that are critical to the proper function of the product in service are covered. Lubrication, Posted in: Some polyurea thickeners are completely compatible with lithium and lithium complex thickeners, while other polyurea thickeners are definitely incompatible with the lithium and lithium complex thickeners. I have it and have used it to bring back some Elixirs from the dead . Wenn eine Dichtung durch ein nicht zugelassenes Fett oder eine nicht zugelassene Flssigkeit ber die Herstellerspezifikation hinaus aufquillt, kann das dazu fhren, dass die hydraulische Scheibenbremse blockiert, oder eine langsame Hebelbewegung verursachen. 2) Die berwurfmutter besteht aus Stahl; die Festigkeit von Stahl wird bentigt, da es sich um eine hohle Mutter handelt, die hohen Drehmomenten standhalten muss. r.queue=[],r.loaded=1*new Date,r.version="1.0.0", This article will describe the most common examples of incompatible grease mixing and how to determine if two greases are compatible. Note: This chart is a general guide to grease compatibility. These greases are very comparable based on their consistency and viscosity of the base oils. The following test results for binary grease mixtures were obtained using the previously described methods and the grease mixing test stand to mix and work the samples. This gives them the kind of soap thickener they need to manufacture grease from. If you want a general rule of thumbs, greases are considered to be compatible if certain specifications of both greases are similar. It is absolutely critical to take into consideration the base oil when determining the compatibility of greases. Some synthetic base oils are incompatible with mineral oils and other types of synthetics, just as in the mixing of lubricating oils. Lubricant Basics: Grease Compatibility - Fluid Life Please enable JavaScript on your browser and try again. DOT assembly grease should be used to lubricate all moving parts inside the lever and caliper assembly. Das Produkt hat noch immer seine orange Farbe und altert im Gegensatz zu DOT-Bremsflssigkeit nicht mit der Zeit. While you're busy planning next trip, we'll focus on finding you the offers and content that you care about. h=e.getElementsByTagName("head")[0]||e.getElementsByTagName("script")[0].parentNode; Das DOT-kompatible Montagefett von SRAM wurde fr alle unsere Bremssysteme getestet und zugelassen egal ob mit Mineral- oder DOT-Flssigkeit. If thats not possible, request a grease compatibility test. This is a fluid immiscibility problem. Conventional polyurea greases have a lot of problems with incompatibility against every other kind of grease except for Calcium Complex and sheer stable polyureas. Wenn du diese Hohlrume mit Fett fllst (was hier nicht der Fall ist), knnen die Gewinde ihr gewnschtes Drehmoment beibehalten. If not, the compatibility of the fluids is relatively easy to determine. It seems like a quick fix but often make piston imbalance worse. In The Grease Experts series, grease veterans Chris and Toby answer questions sourced from real operators to help answer some common questions about grease. It could be expected that the mixture may be subject to softening, oil separation and a tendency to channel when allowed to persist in a mixed state in the motor housing. This should be continued until the problem ceases. Click to expand. Sometimes, though, conditions dictate a change from one lubricant to another. Table 1. Ultimately, the safest practice is to avoid mixing of greases. The resulting mixtures are evaluated for changes in dropping point, shear stability and storage stability. DOT-Schmierfett ist fr das richtige Drehmoment von 8Nm unerlsslich. How to Determine Grease Compatibility and Why It's Important Some may have been referring to the same product categories but failed to use common nomenclature, so it is difficult to determine where there might be an overlap. Many charts include a disclaimer, usually stating that it would be preferable to clean out all old grease and avoid any mixing, or that the charts are believed to be accurate at the time of publication. Posted by: Der Grund dafr ist eine Wechselwirkung zwischen den beiden Materialien, bei der die Dichtungen je nach verwendetem Fett oder verwendeter Flssigkeit aufquellen oder sich zusammenziehen knnen. This is because of the wide variety of materials that can be reacted to form a thickener that is termed polyurea. Big diff. For the purpose of testing grease mixtures, the 25-75, 50-50 and 75-25 ratios are packed sequentially into the bearing by hand, and the adjacent housing area is packed half full. Some mixtures will cause the thickener to release the oil, with the separated phase running freely from the bearing, gear or housing. Contact Us | Sitemap | Terms of Service | Privacy Policy Incompatible - The properties of the mixture are significantly different than those of the individual greases. Das zweite mgliche Problem ist eine suboptimale Kolbenbewegung das liegt an der Konstruktion des Bremssattels, bei der eine Buchse verwendet wird, um das Vor- und Zurckschieben des Kolbens zu ermglichen. Obwohl DOT-Schmierfett den Lack nicht wie DOT-Bremsflssigkeit angreift, verwenden SRAM Bremsbefestigungsschrauben Medium Loctite zur Schmierung, um korrekte Drehmomentwerte zu erhalten und die Schraubenspannung zu gewhrleisten. By submitting this form, you consent to the processing of the above information in the U.S. by SRAM LLC. This begs the question what makes greases compatible vs. incompatible? SRAM hydraulic disc brake grease, formerly known as DOT Grease, is a specially formulated lubricating grease that plays a vital role in the installation of SRAM Hydraulic Disc Brakes. Relative Compatibility Rating B = Borderline C = Compatible I = Incompatible Note: This chart is a general guide to grease compatibility. SRAM Pitstop DOT Disc Brake Assembly Grease, 1oz 4.8 out of 5 stars278 $16.50$16.50$19.50$19.50 FREE delivery Apr 21 - 26 Or fastest delivery Apr 20 - 25 More Buying Choices$13.00(5 new offers) The grease is also evaluated by elemental spectroscopy to assess unexpected final ratios of additives as compared to the anticipated averaging of values seen in the original products, adjusting for mixing ratios. Greases are not created equal there are dozens of options to choose from, each type is designed to work better in a specific application. NFPA 400 states that a flammable . This leads to an oversight with compatibility issues. For a better experience please use a browser other than your current version of Internet Explorer. May 9, 2008. is a chemical effect. Today, with many new complex soaps, polyurea, calcium sulfonate and even more exotic thickeners being used in many greases, the issue of compatibility has become much more complicated. #2. A typical grease compatibility chart is shown in Figure 1. We recommend you consult with your equipment service manuals and/or conduct a grease compatibility test when in doubt. Krytox FAQ - Frequently Asked Questions - Industrial Uses If the grease thickeners are compatible but the base oils are not, the resulting mixture can be problematic. clicking on Submit you agree to terms and conditions and ourprivacy policy. Likewise, when greases are mixed where the base oil viscosities are significantly different, the resulting mixture will not be optimized for the application. For this reason, the mixture was not permitted at the facility, and the decision was made to keep two greases in place until the motors could be removed and thoroughly cleaned of the existing product. This may be due to the fact that polyurea grease can actually be made from lots of different kind of components, reacted together to form something that falls under the umbrella of being called polyurea. I agree to the Terms and Privacy*. All personnel involved in applying grease to equipment should be trained and receive instruction on the proper product to use on each piece of equipment and the location. Wenn die Montage unsachgem und ohne das richtige DOT-Schmierfett durchgefhrt wird, besteht die Mglichkeit, dass Bremsflssigkeit am Gewinde vorbei austritt. Go online to find information about the Moog ball joints. Thickener compatibility chart. Wenn du sprst, dass sich eine Schraube pltzlich leichter drehen lsst, ist in der Regel etwas schiefgelaufen. Die folgende Teilenummer und Beschreibung helfen dir bei deiner Bestellung. Grease Compatibility: Something To Pay Attention To - Bell Performance Save my name, email, and website in this browser for the next time I comment. It has a Lite side and a Dark side and it holdz the Universe together. Formulation or additive incompatibility this is dependent on the robustness of the thickener structure and can occur even when the thickener systems are the same, for example lithium/lithium. Unfortunately, very few charts give any reference for the origin of the data or any research utilized to establish the compatibility relationships described. To understand the issue, you first have to understand what grease actually is. In fact, incompatible greases can lead to ineffective lubrication - and even damage of the lubricated components - through significant hardening or softening of the grease mixture. Find all the documentation needed to set up, use, and maintain your components in the SRAM Service hub. Price and other details may vary based on product size and color. When taking a look at grease compatibility, you need to consider: base oils, additive packages and thickeners. Refer to 49 CFR, Part 172: . New bearings, gears, motors, etc., often come supplied with a product that is incompatible with the grease being used to relubricate. Compatibility of grease mixtures is typically categorized as follows: However, some grease specifications are based solely on grease performance and not on grease composition. This can lead to lubricant loss and cause catastrophic lubrication failure if the problem is not addressed. However, conditions for equipment can change leading to changes in grease types and re-greasing schedules. In grease-lubricated applications, on the other hand, it is usually impossible to remove all of the old grease from the application when changing products. Dielectric Grease/Silicone Paste/Waterproof Marine Grease (8 Oz.) Grease for PLA sprocket - 3D Printing Stack Exchange Compatibility of grease mixtures is typically categorized as follows: Compatible - The properties of the mixture are similar to those of the individual grease. Your email address will not be published. Either you have JavaScript disabled or your browser does not support JavaScript. Please enable cookies on your browser and try again. Base Oils. Some coments suggest using a high temperature silicone grease. When a grease mixture is introduced into a machine, such as a motor bearing, it will undergo significant mixing and working in a relatively short period of time. Jun 20, 2019 DOT 5 or 5.1? On the flip side, shear stable polyurea grease (which is different from conventional polyurea) is compatible with just as everything, Lithium Complex grease, the most popular choice in the marketplace, plays well with everything except Clay (Bentonite Clay), Barium Complex, and conventional Polyurea. (Selected: Fluorocarbon (FKM)) Perfluoroelastomer (FFKM) Fluorocarbon (FEPM - ETP) Tetrafluoroethylene-Propylene (FEPM) Fluorocarbon (FKM) Ethylene-Propylene (EPDM) Nitrile . #1 Gentlemen, i am planning to switch the clutch fluid in Motorcycle from DOT 4 to DOT 5 (Silicone). Compilation of 17 grease compatibility charts Basis for Grease Compatibility It is interesting to note that these grease compatibility charts focus only on the family of thickener involved.