In the world of modern industry and auto repair, choosing the right lubricant is a critical step in equipment maintenance. Tomflon SK 250 has proven itself as a reliable solution for units operating under high load conditions. This product is designed to be durable and stable over a wide temperature range.
This material is based on high-quality mineral oil thickened with a lithium complex, which provides it with excellent mechanical stability. The composition also includes special additives that give the lubricant anti-corrosion and extreme pressure properties. Usage Tomflon SK 250 allows you to significantly extend the life of operating mechanisms.
When choosing a lubricant, it is important to consider not only the price, but also the technical parameters declared by the manufacturer. In this article we will analyze in detail the features of the composition, scope of application and advantages of this product over competitors. You will find out why this particular composition is often recommended for maintenance plain bearings and rolling.
Chemical composition and physical properties
The base component of the product in question is purified, high-viscosity mineral oil. It is this that ensures the creation of a durable oil film between the rubbing surfaces. Thickener based lithium soap gives the structure the necessary density and prevents leakage from friction units when heated.
Visually, the material is a homogeneous mass of yellow or light brown color. The consistency of the product corresponds to the NLGI 2 classification, which means its ability to be retained in open and closed mechanisms. An important characteristic is the dropping temperature, which for this brand reaches 180 degrees Celsius.
⚠️ Attention: Despite the high dropping point, it is not recommended to use the lubricant in components where local heating exceeds 130°C, as rheological properties may change.
The additives included in the composition play the role of antioxidants, slowing down the aging process of oil under the influence of oxygen and high temperatures. There are also components that reduce friction and wear of metal parts. It does Tomflon SK 250 a universal tool for servicing a variety of equipment.
When storing lubricant in an open container, ensure that the surface is clean to prevent the ingress of abrasive particles that could damage the bearings.
Specifications and Standards
For professional use, it is necessary to rely on specific digital parameter values. Tomflon SK 250 complies with a number of international and domestic quality standards. Understanding these characteristics allows you to choose the right analogue if replacement is necessary.
Below is a table with basic technical data that will help you navigate the capabilities of the product. These parameters are averaged and may vary slightly depending on the production batch.
| Parameter | Meaning | Test method |
|---|---|---|
| Penetration (60 double strokes) | 265-295 mm/10 | ASTM D217 |
| Dropping point | min. 180°C | ASTM D2265 |
| Operating temperature range | -30...+120°C | Experienced data |
| Color | Yellow/Brown | Visually |
It is important to note that the product has good water resistance, as confirmed by the DIN 51 502 (K2K) standard. This means that the lubricant can withstand short-term exposure to water without losing its protective properties. However, continuous immersion in water is not recommended.
Application areas of the lubricant
Scope of use Tomflon SK 250 quite wide due to its balanced composition. First of all, this material is intended for lubricating rolling and sliding bearings of electric motors. It is perfect for units operating at moderate speeds.
In the automotive industry, the lubricant is used to service constant velocity joints (CV joints), if they do not require specialized molybdenum compounds with molybdenum disulfide. It is also effective in:
- 🔧 Bearings of generators and starters
- 🔧 Cardan shaft joints
- 🔧 Brake caliper guides (with caution)
- 🔧 Low and medium power gearboxes
Industrial applications include the lubrication of friction units of machine tools, conveyor lines and agricultural machinery. Tomflon has proven itself in mechanisms that require long-term operation without frequent maintenance. The main condition is the absence of extreme loads and ultra-high speeds.
⚠️ Attention: Do not use this lubricant for components with very high rotation speeds (more than 300,000 rpm * dN), as the thickener may not withstand such loads.
Compatible with materials and other lubricants
One of the key issues when servicing equipment is the compatibility of materials. Tomflon SK 250 inert towards most structural metals, including steel, cast iron and non-ferrous metals. It does not cause corrosion and does not destroy the surface of parts.
As for polymers and elastomers, the situation is as follows: the lubricant is compatible with most standard rubber products (RTI). However, if the assembly uses specific types of plastic or rubber, it is recommended to conduct a preliminary compatibility test.
When mixed with other lubricants, different reactions are possible. Lithium greases are generally compatible with each other, but mixing with calcium or sodium compounds may cause the mixture to thin out or over-harden.
What happens if you mix different types of lubricants?
Mixing incompatible thickeners can lead to stratification of the mixture, loss of load-bearing capacity and oil leakage from the friction unit, which will cause rapid wear of parts.
If you are switching from one type of lubricant to another, the ideal option would be to completely clean the assembly of old material. This ensures that Tomflon SK 250 will work with the declared efficiency without the interference of foreign components.
Advantages over competitors
There are many analogues on the lubricants market, but Tomflon SK 250 stands out with a number of advantages. First of all, it is an affordable price while maintaining the high quality of the base oil. The product is manufactured under strict quality control standards.
Other advantages include:
- 🛡️ Excellent corrosion protection in high humidity conditions
- 🛡️ Viscosity stability under temperature changes
- 🛡️ Low volatility of the oil base
- 🛡️ Good anti-friction properties
Long service life reduces the frequency of equipment maintenance. This is especially true for industrial enterprises, where downtime of equipment leads to financial losses. Using a quality lubricant is an investment in reliability.
The main advantage of Tomflon SK 250 is the optimal price-quality ratio for standard friction units operating in moderate temperature conditions.
Instructions for correct application
To achieve the maximum effect from using a lubricant, it is necessary to follow the technology for its application. Before starting work, make sure that the friction unit is cleaned of dirt, dust and old lubricant residues. This can be done using a solvent or special washing liquid.
The process of lubricating bearings can be done manually or using a grease gun. It is important to fill the space between the rolling elements evenly, but not to overdo it. Overfilling a bearing with grease can lead to overheating during operation.
☑️ Procedure for lubrication
When packing grease into sealed bearings, it is recommended to fill approximately 30-50% of the free volume. For open units operating in difficult conditions, the filling degree can be increased to 70%. After application, the shaft must be rotated by hand to ensure there are no jams.
⚠️ Attention: If during operation you notice a change in the color of the lubricant to black or the appearance of metal shavings, this is a signal that you need to replace the lubricant and diagnose the unit.
Frequently asked questions (FAQ)
Is it possible to use Tomflon SK 250 at subzero temperatures?
Yes, the lubricant retains its properties at temperatures down to -30°C. However, at extremely low temperatures (below -40°C), it is recommended to use synthetic lubricants based on PAO or esters, as the mineral base may thicken.
Is this grease suitable for high speed bearings?
For high-speed bearings (speed coefficient dN > 300,000), it is better to use specialized lubricants with a synthetic base and low rolling resistance. Tomphlon SK 250 is more focused on medium speeds and loads.
What is the shelf life of lubricant in a closed container?
If storage conditions are observed (dry room, temperature from -20 to +40°C), the shelf life is 5 years from the date of production. After opening the container, it is recommended to use the product within one year, ensuring that the packaging is sealed.
How can I replace Tomflon SK 250 if it is not available?
As analogues, other general purpose lithium greases that comply with the NLGI 2 standard can be considered. Examples include products such as Litol-24, Shell Gadus S2 V220 2 or Mobilgrease XHP 222, however, their characteristics may differ slightly.
Is this lubricant safe for food processing?
No, Tomflon SK 250 does not have NSF H1 approval and is not intended for contact with food. For food production it is necessary to use specialized food lubricants that have the appropriate certification.