TSB: DIN 51517 Part 3 (CLP) Specification Update

TSB: ID-2004-11-4

AMSOIL Technical Service Bulletin

Original Date: 11/15/04
Revision: 8/4/10
Updated: 06/26/24

SUBJECT: DIN 51517 Part 3 (CLP) Specification Update

Below is a description of the changes to the DIN 51517 gear oil standard. We also offer two AMSOIL Gear Oils that meet the DIN 51517 Part 3 (CLP) specification.

We can offer AMSOIL Synthetic Oils at wholesale in the US and Canada. Request a wholesale price using the form on this page. Add “DIN 51517” to the subject line. Or or call us at 1-800-748-5781.

OBJECTIVE:

Define changes to the DIN 51517 industrial gear oil standard and provide the best-suited AMSOIL Synthetic Gear Lubes that meet it.

ISSUES:

DIN 51517 provides a specification for end users, original equipment builders, gear manufacturers and lubricant suppliers. It contains minimum performance guidelines for lubricants used with enclosed and open gearing installed in general industrial and power transmission applications. DIN 51517 was updated in 2004 to more closely align it with current International Organization for Standardization (ISO) standards.

DESCRIPTION:

DIN 51517 describes three types of industrial gear oils depending on application and severity: Part 1 (C), Part 2 (CL) and Part 3 (CLP).

  • Part 1 (C) gear oils are primarily recommended for constant circulation and immersion lubrication in applications requiring only modest lubrication (additive-free lube oil raffinate).
  • Part 2 (CL) gear oils are primarily recommended for constant circulation lubrication; they are formulated with age resistant and anti-corrosion properties enhanced by rust and oxidation additives.
  • Part 3 (CLP) gear oils are primarily recommended for constant circulation and immersion lubrication, and are most commonly used in enclosed industrial gear boxes. In addition to anti-corrosion and counter oxidant properties, they have excellent anti-wear characteristics.

The DIN 51517 changes are restricted to Part 3 (CLP) gear oils:

1. The addition of the FE8 bearing test, which tests for reduced friction and wear and measures gear lube film thickness.
2. A change to the ASTM D2893B oxidation procedure. This severe oxidation test runs for 312 hours at 121ºC (250ºF), and is equivalent to the U.S. Steel 224 S-200 oxidation test.
3. The inclusion of specified limits for the elastomer compatibility test, which tests SRE-NBR 28 rubber seal compatibility.

PRODUCT RECOMMENDATIONS:

AMSOIL offers two products that meet the DIN 51517 Part 3 standard. Use the ISO grade as suggested by the equipment manufacturer.

SG Series Synthetic EP Gear Oils passes the DIN 51517 Part 3 (CLP) tests.

RC Series Synthetic R&O Oil (ISO 150, 220, 320, 460 only) meets the DIN 51517 Part 3 specification.