K93100 Four Ball Tester


Features and Benefits
• Conforms to ASTM D2266, D2596, D2783, D4172, D5183; IP239 and IP300 test standards. (Note: for IP300, the optional peristaltic pump, pitting detector and ball cup with ball race are required)

• Performs Wear Preventative (WP) and Extreme Pressure (EP) tests

• Electronically controlled test speed and temperature

• Windows® 95/98/NT WinLube Data Acquisition Software and Card included to record and graph temperature, normal load and friction force parameters in real-time

• CCD Camera, Video Card and Wear Scar Analysis Software are available for wear scar imaging and measurement

• Custom configurations are available


K93100 Four Ball Tester
The Four Ball Tester is used to test the Wear Preventive (WP) and Extreme Pressure (EP) characteristics of greases and lubricating oils in sliding steel-on-steel applications. The point contact interface is obtained by rotating a 12.7mm diameter steel ball under load against three stationary steel balls immersed in the lubricant. The normal load, frictional force, and temperature can be monitored using WinLube, the supplied Windows-based Data Acquisition Software. The rotating speed, normal load, and temperature can be adjusted in accordance with published ASTM and IP test standards. For evaluating the Wear Preventive characteristics of lubricants, the subsequent wear scar diameters on the balls can be measured using a graduated-scale microscope. The wear scar can also be captured using an optional Closed Circuit Digital (CCD) camera and measured using our Wear Scar Analysis Software. For evaluating the Extreme-Pressure (load-carrying) capacity of lubricants, the normal load at which welding occurs at the contact interface can be recorded.

Conforms to: ASTM D2266, D2596, D2783, D4172, D5183; IP 239, IP 300

Electrical Requirements:
220V, 60Hz*
440V, 50Hz*
*Other electrical specifications are available. Please contact Koehler Customer Service.

Drive Motor Power: 1.5 kW

Test Speeds: 1200, 1440, 1760 rpm (adjustable)

Optional Test Speeds: 300/3000,1000/3000 and 2000/10000 rpm

Maximum Axial Load: 10000 N at 3000 rpm or 12000 N at 1800 rpm

Test Duration : 1 to 9999 min

Test Ball diameter: 12.7mm

Included Accessories
Set of Weights
12.7mm Ball Chucks (2)
Ball Pot (2)
Ball Pot Heater
Ball Chuck Remover
Ball Inserter/Extractor Tool
Set of Hand Tools
Torque Wrench
Illuminated, Graduated-scale Microscope (x30 mag)
Temperature Sensor, spare
Heater Cartridges (2), spare
Fuses (2), spare
Electronic Controller
Connecting Cables
Data Acquisition Card
Data Acquisition Software
Operating and Maintenance Manuals
Calibration and Test Reports

Ordering Information



Product Description

Electrical Requirements


Four Ball Tester

220V, 60Hz*


Four Ball Tester

440V, 50Hz*


*Other electrical specifications are available. Please contact Koehler Customer Service.




Product Description


CCD Camera, Video Card and Wear Scar Analysis Software


Pitting Detector


Peristaltic Pump


Running Ball Cup with Ball Race