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Cummins introduces QTR transmission series


Application-specific transmissions feature unique Lay Shaft Design for smoother Powertrain performance

ODESSA, Texas – Cummins Inc. (NYSE: CMI) today at the Permian Basin Oil and Gas Show unveiled the QTR Series Transmission line specifically designed to meet the strenuous requirements of high-horsepower pressure pumping operations in the oil and gas well-servicing industry.

The new Cummins line of transmissions – the QTR Series Transmissions – will be capable of up to 3000 horsepower. The first in the series – the QTR2500 and QTR3000 – will be available in the fourth quarter of 2011. The transmissions will be available as a package, coupled with a Cummins QSK50 or QSK60 engine, depending on the horsepower requirement, or as stand-alone transmissions.

“Cummins has been watching oil and gas industry trends over the past several years and sees a greater demand now, and in the future, for a dependable and reliable transmission delivering over 2500 horsepower,” said Erik Drewry, Director – High-Horsepower Oil and Gas Business. “We already have a dependable series of engines that deliver the horsepower required for the difficult fracturing jobs globally. The next strategic product for Cummins to deliver is a complete package – a durable engine coupled with a robust transmission,” he continued.

The QTR Series Transmission is the first application-specific transmission in the industry, designed to provide superior performance and durability in the high-demand pressure pumping industry. Intended to complement the industry-leading Cummins QSK50 and QSK60 engines, the QTR Series Transmissions are designed as a direct replacement for existing powertrain products. This flexibility allows operators the opportunity to access renowned Cummins product quality and reliability in addition to world-class product support in existing equipment fleets while minimizing the need for redesign.

“Cummins is committed to adding superior products to our oil and gas product line, and the QTR Series Transmissions are another example of that,” said Mark Levett, Vice President and General Manager – High-Horsepower Business. “We want to offer a complete product line supported 24 hours a day, seven days a week by our global distributors,” he added.

QTR Series Transmission Advanced Technologies

QTR Series Transmissions bring significant powertrain performance advantages to pressure pumping and fracturing operations. This unique lay shaft design – the first in the high-horsepower pressure pumping market – has enabled Cummins to offer the exact gear ratios required by the industry to match both engine and pump performance.

The QTR Series Transmission Dual Clutch technology with Cummins Synchro Shift design provides smoother operation and an increase in both reliability and service life. The Dual Clutch input and Cummins Synchro Shift represent a significant breakthrough for high-horsepower applications by bringing proven high-performance technology to industrial applications for the first time. This design eliminates common failure mode components experienced by current market offerings while improving thermal and mechanical efficiency and reducing overall complexity. As a result of the new design, QTR Series Transmissions are capable of providing constant torque across operating ranges. In addition, the operator will experience smoother start-up and shifting.

Extensive “Voice of the Customer” consultations have resulted in an industry first: the Cummins Electronically Controlled Pressure Test Mode. Intended for use during pressure testing, the Cummins Electronically Controlled Pressure Test Mode allows operators finite control of output shaft speed in order to maintain minimum flow at very high pressure for test applications. This innovative design prevents powertrain shock loading currently experienced during this pressure testing – a major source of drivetrain component failures.

To develop the QTR Series Transmissions, Cummins partnered with Pacific Rim Engineered Products (PREP), an expert in the transmission market.

“I am confident we are delivering a superior product to the market. Cummins is working with an expert in the transmission market, PREP, to integrate our proven QSK50 and QSK60 engines with a transmission design that will differentiate us from the competition,” said Jim Trueblood, Vice President – Cummins High-Horsepower Engineering.

“The QTR Series Transmissions meet Cummins stringent quality standards by utilizing unique technologies that allow for ease of operation, improved productivity and a simplified installation for the customer. In addition, we are leveraging genuine Cummins parts and service support capabilities within our global distribution network, delivering a total Cummins solution for pressure pumping applications,” added Trueblood.

Additional details and product brochures are available at

About Cummins

Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems. Headquartered in Columbus, Indiana (USA), Cummins serves customers in approximately 190 countries and territories through a network of more than 500 company-owned and independent distributor locations and approximately 5,200 dealer locations. Cummins reported net income of $428 million on sales of $10.8 billion in 2009. Press releases can be found on the Web at


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