Contact us

Please leave a message

×

Invalid Captcha
Thank you for your message. A representative will get in touch with you shortly.
Koehler - Tribology - Four Ball Tester

Koehler’s Four Ball Tester determines the Wear Preventative (WP) and Extreme Pressure (EP) characteristics of lubricating oils and greases in sliding steel-on-steel applications. The test consists of rotating a steel ball under load against three stationary steel balls coated with lubricant. Measurements are taken at the rotating speeds, temperatures, and duration as specified by published standards. The load-wear index can be calculated from the weld point in EP tests, and lubricant comparisons can be made based upon scar diameters incurred from wear tests.

Available models

Koehler - Tribology - Four Ball Tester
Conformation of specifications
ASTM D2266, D2596, D2783, D4172, D5183*, IP 239
Drive Motor
1.5 kW
Test Speeds
1200, 1440, 1760 rpm
Optional Test Speeds (min/max)
1000/3000, 300/3000 rpm
Maximum Axial Load
10000 N at 3000 rpm or 12000 N at 1800 rpm
Test Duration (min/max)
1/9999 min
Test Ball diameter
12.7 mm
  • Model No: K93100
  • 220V,60 Hz
Koehler - Tribology - Four Ball Tester
Conformation of specifications
ASTM D2266, D2596, D2783, D4172, D5183*, IP 239
Drive Motor
1.5 kW
Test Speeds
1200, 1440, 1760 rpm
Optional Test Speeds (min/max)
1000/3000, 300/3000 rpm
Maximum Axial Load
10000 N at 3000 rpm or 12000 N at 1800 rpm
Test Duration (min/max)
1/9999 min
Test Ball diameter
12.7 mm
  • Model No: K93100-PN
  • 220V,60 Hz
Koehler - Tribology - Four Ball Tester
Conformation of specifications
ASTM D2266, D2596, D2783, D4172, D5183*, IP 239
Drive Motor
1.5 kW
Test Speeds
1200, 1440, 1760 rpm
Optional Test Speeds (min/max)
1000/3000, 300/3000 rpm
Maximum Axial Load
10000 N at 3000 rpm or 12000 N at 1800 rpm
Test Duration (min/max)
1/9999 min
Test Ball diameter
12.7 mm
  • Model No: K93190
  • 380V,50 Hz
Koehler - Tribology - Four Ball Tester
Conformation of specifications
ASTM D2266, D2596, D2783, D4172, D5183*, IP 239
Drive Motor
1.5 kW
Test Speeds
1200, 1440, 1760 rpm
Optional Test Speeds (min/max)
1000/3000, 300/3000 rpm
Maximum Axial Load
10000 N at 3000 rpm or 12000 N at 1800 rpm
Test Duration (min/max)
1/9999 min
Test Ball diameter
12.7 mm
  • Model No: K93190-PN
  • 380V,50 Hz

Key features

  • Conforms to ASTM D2266, D2596, IP 239, and related specifications
  • Performs Wear Preventative (WP) and Extreme Pressure (EP) tests
  • Displays and records normal load, frictional torque, time, and temperature
  • Test speeds and temperatures are electronically controlled
  • Data Acquisition Software and Card are included
  • Custom configurations are available
  • Precise variable loading capability
  • Automotive
  • Chemical
  • Machinery & Manufacturing
  • Mining & Minerals
  • Oil & Gas
  • Railway
Koehler Instrument CompanyProviding quality testing instrumentation and technical support services for research and testing laboratories has been our specialty since 1925. Meeting your testing needs is the primary focus of our business, which is why Koehler Instrument Company is a leading producer and supplier of petroleum, synfuels and petrochemical instrumentation worldwide. At Koehler, we pride ourselves in innovation. In a time of continuous technological advancement and transition we are constantly implementing new and improved ways to surpass the needs of an ever-evolving industry. Koehler products are backed by our staff of technically knowledgeable, trained specialists who are experienced in both petroleum products testing and instrument service, which is carried out either on site or at a Koehler service center.
[]