K94300 Grease Noise Tester


Features and Benefits
• Quantitative Assessment of grease/bearing noise characteristics

• Fast and Reliable Data Analysis

• Peak Detection Algorithm to filter the input signal and retain vibration peaks only

• Data Acquisition Software package to monitor, record, and evaluate test results on a PC

• PC includes special interface and program to carry out measurements automatically and store the data results

• Semi-automated operation

• High quality test spindle rotating at 1800 rpm

• Special adapter to hold the test bearing; features grease inlet and outlet and an inlet for compressed air

• Pneumatic loading device for the test bearing

• Grease Dosage Unit for automatically controlled dosage application of the test grease into the test bearing

• Peak Detection Algorithm

• Printer / Plotter optional to print out tabular reports or line charts of the data results


K93800 Grease Noise Tester
This instrument is used to test the lubrication integrity of greases. The use of clean lubricants is essential for obtaining long bearing life. Many factors affect the degree of cleanliness of greases during normal operation but a clean grease for initial lubrication as well as re-lubrication is essential to ensure machine longevity. In applications where bearing fatigue life is not critical (i.e. - low operating loads), clean grease is still essential to ensure low bearing noise required for many electric motor applications. Therefore, the grease noise tester is an invaluable tool to determine quiet running characteristics of various grease lubricants. Our grease noise tester has two major advantages over other noise testers:

1. Provides a quantitative assessment of the noise characteristics of the grease

2. Provides the tools and resources for fast and reliable analysis

Quantitative Assessment
The grease noise tester is able to measure the specific distrubance caused by the rolling of particulate, called vibration peaks. The tester contains a proprietary Peak Detection Algorithm which enables these vibration peaks to be singled out from the total bearing vibration signal. The number of vibration peaks detected, as well as their intensity, can be evaluated to determine a quantitative value for quiet running behavior of the bearing. Furthermore, the tester can perform "grease damping ability" which allows for a direct comparison between the running of a dry bearing vs. the running of a lubricated bearing.

Fast and Reliable Analysis
The grease noise tester is semi-automated and is designed to allow for proper testing while minimizing the risk of outside contamination of the test grease lubricant. This is done through computer-controlled grease dosages and peak measurements on a single test bearing of special low noise quality. The operator simply mounts the test bearing and test grease syringe into the tester, programs the test parameters into the computer, and starts the test. The test results can be monitored, recorded, and evaluated on a PC with the provided data acquisition software package.

Spindle System: Hydrodynamic Oil Spindle

Air Supply: Pneumatic System min. 5.5 Bar Clean and Dry Air

Axial Loading System: Pneumatic, max. 30 N

Spindle Speed; 1800 rpm

Industrial PC:
233 MHz CPU
SVGA, 2 MB VRAM, 15" monitor
Data Acquisition Board with Loudspeaker
Hard Disk, 1 GB capacity
Windows NT Operating System

Sensor: Velocity Proportional Sensor

Measuring Modes:
Start-Up: measures grease noise during the start-up phase of the bearing
BEQUIET: measurse vibration peak values and grease quality classification
BEQUIET +: measures "grease dampening ability"

Electrical Requirements
Various electrical specifications are available, please contact Koehler Customer Service.

Included Accessories
Pick-Up Sensors (2)
Test Bearing
Calibration Unit

Ordering Information



Product Description

Electrical Requirements


Grease Noise Tester

Various electrical specifications are available. Please contact Koehler Customer Service.