LGEM 2 Solid Lubricant-Containing High-Viscosity Bearing Grease

Specifications

How to choose Grease

Points to check when selecting, with the values for this product (LGEM 2).

1. 1. Check the operating temperature range and dropping point

   This product: Operating Temperature Range –20 ～ +120 °C

   First confirm that the operating temperature falls within the service temperature range. Listed dropping points range from 120 to 300°C, which indicate the temperature at which the grease softens and flows at high temperature, but the dropping point is not the same as the continuous service temperature. On the low-temperature side, starting torque and pumpability are affected.

2. 2. Select base oil viscosity to suit speed and load

   This product: Base oil kinematic viscosity (40°C) 500 mm2/s

   The base oil kinematic viscosity at 40°C varies widely among listed products, from 18 to 1370 mm2/s. Low viscosity suits high-speed rotation or low-torque applications, while high viscosity suits low-speed, high-load applications where an oil film must be maintained. Estimate the required viscosity from bearing speed, load and operating temperature.

3. 3. Evaluate water and heat resistance by thickener

   This product: Thickener Lithium/calcium

   Lithium soap is general purpose, lithium complex tends toward higher-temperature use, and calcium sulfonate complex tends to be resistant to large amounts of water and high loads. Greases with different thickeners may soften when mixed, so confirm compatibility with the existing grease when replenishing.

4. 4. Match the NLGI consistency grade to the lubrication method

   This product: NLGI viscosity grade (consistency number) 2

   In NLGI grades, a smaller number means a softer grease. Grade 1 is used for pumpability in centralized lubrication, grade 2 for general bearings, and grade 3 for locations where grease tends to flow out, such as vertical shafts and large bearings. Also check the worked penetration range.

5. 5. Check extreme pressure performance for high-load applications

   This product: Four-ball welding load Min. 3400 N

   For shock loads or low-speed, high-load conditions, the four-ball weld load (2000 to 8000 N among listed products) serves as a guide to extreme pressure performance. Where micro-slip or oil film breakdown is likely, grades containing solid lubricants such as molybdenum disulfide or graphite are also candidates.

6. 6. Select base oil type for special environments

   This product: Base oil type (kind) Mineral oil

   Mineral oil grades are used for general applications, synthetic oils such as PAO for low temperatures down to around -50°C or ultra-high speeds, ester-based biodegradable grades for environmental considerations, and fluorine-based grades for vacuum and clean environments. For vacuum applications, also check the ambient pressure, cleanliness level and evaporation loss data.

This guide was written by AI based on the listed products' documents and specification items.

About Grease and all products

Description

A high-viscosity mineral oil-based grease with lithium/calcium soap thickener, blended with molybdenum disulfide and graphite. Maintains lubrication performance even when the oil film is depleted.

FAQ

Q. What is the operating temperature range and dropping point of LGEM 2?

A. The operating temperature range is –20 to +120 °C, and the dropping point is >180 °C.

Q. What applications is LGEM 2 suitable for?

A. It is suitable for rolling bearings operating at low speed and high load, jaw crushers, track-type vehicles, lift mast wheels, and construction equipment such as pile drivers and cranes. It is designed for severe construction equipment applications involving high load, high vibration, and low-speed rotation.

Q. What are the lubrication performance features of LGEM 2?

A. It contains molybdenum disulfide and graphite, which maintain lubrication performance even when the oil film is depleted. High oxidation stability is also a key feature.

Q. What are the thickener, base oil, and NLGI consistency grade of LGEM 2?

A. The thickener is lithium/calcium, the base oil is mineral oil, and the NLGI consistency grade (worked penetration number) is 2.

Q. What are the DIN 51825 code and base oil kinematic viscosity of LGEM 2?

A. The DIN 51825 code is KPF2K-20. The base oil kinematic viscosity is 500 mm2/s at 40 °C and 32 mm2/s at 100 °C.

Written by AI based on the content of the source documents.

Source documents

• Catalog SKFメンテナンス製品と潤滑製品 204 pages Open page 147
  Found on: https://azuma-eg.com/catalogue/