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EXSEV®-EX (Grease)

EXSEV® / JTEKT Corporation (Official website) / Listed on page 10 of the document

Fluorinated grease for vacuum environments with low particle generation. Usable in rolling bearings, linear motion bearings, and ball screws.

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EXSEV®-EX (Grease) on page 10 of JTEKT Corporation "特殊環境用 EXSEV 商品ガイド"
Source: JTEKT Corporation「特殊環境用 EXSEV 商品ガイド」page 10
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Specifications

Cleanliness level Class 100
Operating Temperature Range -50～260 ℃
Atmospheric pressure Atmospheric pressure to 10-5 Pa

EXSEV® model comparison

Compare 9 models in the same series by specification.

Model Operating Temperature Range Cleanliness level Atmospheric pressure Permissible rotational speed Permissible radial load
EXSEV®-EX -50～260 ℃ Class 100 Atmospheric pressure to 10-5 Pa dmn value < 72000 min-1 —
EXSEV®-EX（グリース） This product -50～260 ℃ Class 100 Atmospheric pressure to 10-5 Pa — —
EXSEV®-FA -100～200 ℃ Class 1000 Atmospheric pressure to 10-5 Pa dmn value < 18000, max. 1000 min-1 Approx. 1% or less of basic dynamic load rating
EXSEV®-MG -200～350 ℃ — 10-5～10-10 Pa dmn value < 18000, max. 1000 min-1 Approx. 3% or less of basic dynamic load rating
EXSEV®-MO -100～300 ℃ — Atmospheric pressure to 10-5 Pa dmn value < 18000, max. 1000 min-1 Approx. 3% or less of basic dynamic load rating
EXSEV®-PN -30～300 ℃ — Atmospheric pressure to 10-5 Pa dmn value < 18000, max. 1000 min-1 Approx. 3% or less of basic dynamic load rating
EXSEV®-SK -30～120 ℃ — — — —
EXSEV®-WS -100～350 ℃ — Atmospheric pressure to 10-5 Pa dmn value < 7200, max. 500 min-1 Approx. 5% or less of basic dynamic load rating
EXSEV®-XT 200～300 ℃ — Atmospheric pressure to 10-5 Pa dmn value < 7200 min-1 —

How to choose Grease

Points to check when selecting, with the values for this product (EXSEV®-EX (Grease)).

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

    This product: Operating Temperature Range -50～260 ℃

    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

    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

    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

    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

    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

    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

Fluorinated grease for vacuum environments with low particle generation. Delivers high performance in rolling bearings, linear motion bearings, and ball screws.

Features

  • Low particle generation
  • For vacuum environments

FAQ

Q. What equipment and components can EXSEV®-EX (Grease) be used in?
A. It can be used in rolling bearings, linear motion bearings, and ball screws. It is a fluorinated grease for vacuum environments with low particle generation.
Q. What are the operating temperature range and ambient pressure range of EXSEV®-EX (Grease)?
A. The operating temperature range is -50 to 260 ℃. The ambient pressure range is atmospheric pressure to 10-5 Pa.
Q. What is the cleanliness level of EXSEV®-EX (Grease)?
A. The cleanliness level is Class 100.

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

Source documents

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