Koehler K94400 / K94490 Emcor Grease Testing Machine

Condition: New Brand new item from stock or on order from manufacturer
Stock #:
Available In Stock (request a quote)
Dimensions (approx.):
48.5"W x 15"D x 11"H (outside)
Specify 115 or 230 Volts, 50/60 Hz,
Product Description Measures the ability of a grease to protect a bearing against corrosion in the presence of water. Two sets of grease-coated bearings per station are partially immersed in water and rotated at a speed of 80 rpm in a sequence of running and resting periods. At the end of the test, the raceways of the bearing outer rings are inspected for rust.

Features and Benefits:
- Conforms to ASTM D6138, IP 220, DIN 51802, and related international test methods
- Evaluates the rust preventive properties of greases and oils
- Performs both standing and dynamic testing

The Emcor Grease Testing Machine evaluates the rust preventive properties of greases on bearing components, measuring the ability of a grease to protect a bearing against corrosion in the presence of water. As bearings are normally used in environments exposed to humidity and temperature variations, condensation may form on the bearing thus promoting the onset of rust. Rust is detrimental to proper bearing operation and will compromise the longevity of the bearing. A good quality grease should be designed to protect the bearing from rust and corrosion under these conditions.
The Emcor test is performed by mounting a double-row bearing per test station for up to 8 separate test stations. The test bearings are specially-treated 1306K/236725 double row self-aligning ball bearings. The bearings are washed carefully, filled with the appropriate quantity of test grease and fitted on the shaft with the help of a nylon sleeve and nut. The seals are fitted and the specified quantity of water is introduced into the housings. The bearings are placed in the housings, and the housings are closed and sealed. The test is conducted with the bearings partially immersed in water and in a sequence of running and resting over a period of one week. This also determines whether the thin oil film left in the contact zone of rollers and raceways is able to protect the bearings against corrosion while the bearings are standing. At the end of the test, the raceways of the bearing outer rings are inspected for rust. The Emcor system features test method versatility, since both greases and oils can be tested as well as variations can be made with regard to the test medium (e.g., brine instead of water). The costs for running these tests are minimal. The two test bearings are the only machined parts that have to be renewed for each test, and the polyamide material for the housing is rigid and strong and rarely ever needs replacement.


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