
Made for toughest conditions


HIGH-PERFORMANCE FAN CLUTCHES MADE FOR TOUGHEST CONDITIONS
PRODUCTS
Engine Fan Clutches

Series 125

Rockford Fan Clutch Series S125
The Series 125 is a variable Rockford fan clutch. It is designed for industrial and off-highway applications. It is used where space limitations are critical, and is intended to interface with current or future electronics control technology.
Series 170

Rockford Fan Clutch Series S170
The Series 170 Rockford fan clutch is designed for medium to lighter duty off-highway and industrial applications. This oil-actuated fan clutch enables
vehicle efficiency gains and aids in noise reduction applications.
Series 200
The Series 200 Rockford fan clutch is designed for medium duty off-highway applications and industrial applications. This fan clutch enables vehicle efficiency by minimizing parasitic load on the engine and reduced warm up time.
Series 270

Rockford Fan Clutch Series S270
The Series 270 Rockford fan clutch is designed for heavy-duty off-highway applications. This fan clutch provides efficiency through on demand cooling in large applications. The effects of over cooling are reduced in cold weather applications.
Series 370

Rockford Fan Clutch Series S370
The Series 370 Rockford fan clutch is designed for the largest applications. This is the newest addition to the Rockford product line. This fan clutch was developed to meet the cooling demands of the largest off-highway applications.
NEWS
1890
1917
The first Rockford® Clutches were introduced
1917
1945
Rockford Drilling Machine Division was renamed Rockford® Clutch Division
1961
Rockford® Clutch builds new facility at Loves Park, IL
1961
1972
Thermal Air Valve for Fan Clutch - Patent 3,804,219
Beginning of the modulating clutch, using the thermal valve
1974
Introduction of Series 5.25 Rockford® Clutch - Patent 3,804,219
1974
1974
Completed a state of the art research and test facility at the Loves Park, IL location
1981 – 1987
Multiple series Rockford® Clutches introduced establishing market leader position
1981 – 1987
1984
Temperature Control developed – Internal Combustion Engine - Patent 4,546,742
Precise control of Rockford® Clutches
1987
Introduction of Series 270 Rockford® Clutch - Patent 4,899,861
1987
1987
PWM Solenoid Valve Introduced
Facilitating interface between Rockford® Clutch and Engine Control Modules
1988
Rockford® Clutch becomes a part of the future Powertrain Rockford, Inc.
1988
1995 – 2004
Development of new size Fan Clutches - Patent 5,667,045; 5,855,266; 5.937,979; 5,947,247
1999
Introduction of Series 170 Rockford® Clutch
Expanding within construction markets
1999
2001 – 2002
Introduction of Series 150 Rockford® Clutch
Further expansion within construction markets
2002
Introduction of Series 200 Rockford® Clutch
Expanding of performance range for specialty applications
2002
2004
Introduction of Series 370 Rockford® Clutch
Designed for the largest off-highway applications
2007
The future Powertrain Rockford, Inc. becomes part of a public, global engineering business
2007
2014
Introduction of Series 125 - Patent 9,845,833
Expanding performance range to include agriculture, power generation, and other smaller industrial applications
2019
Powertrain Rockford, Inc. becomes part of the Walterscheid Powertrain Group
Increases the focus of Rockford® Clutch products and supports global presence in all markets
2019
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