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DC Servo Motors combine compact design, high performance.

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DC Servo Motors combine compact design, high performance.
DC Servo Motors combine compact design, high performance.
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January 16, 2012 - Comprised of 1.18 in. dia models available in 2.114, 2.585, and 3.057 in. lengths, brush-commutated 8540 Series delivers optimized power density via use of bonded neodymium magnets. Continuous torque ratings from 2.5-8.3 oz-in. are achieved without heat sink, and 8 standard windings are available from 9.55-48 V; customized windings may also be designed for specific applications. Other features include pre-loaded ball bearings and optimized bearing support system.

Pittman® 8540 Series DC Servo Motors Offer High Performance in a Small Package

(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)

Pittman Corp
343 Godshall Drive
Harleysville PA, 19438

Press release date: January 13, 2012

HARLEYSVILLE, PA - PittmanŽ 8540 Series brush-commutated DC motors are designed using the latest advancements in materials and manufacturing technology. This product line is ideal for customer applications requiring high performance in a small package size. The 8540 Series is a significant improvement over similar sized older generation Pittman motors and is perfect for high-tech applications found in medical devices, lab instrumentation, data storage, and precision automation machinery, to name a few.

The most significant feature of the new design is a greatly improved power density through the use of bonded neodymium magnets. The 8540 has approximately twice the continuous torque rating, compared with the previous generation of motors. The 8540 Series motors are 1.18" (30mm) in diameter and are available in three lengths; 2.114" (53.69mm), 2.585" (65.66mm), and 3.057" (77.65mm). Depending on the model, they can achieve a continuous torque rating from 2.5 oz-in (0.018 Nm) to 8.3 oz-in (0.059 Nm) without the use of a heat sink.

The 8540 Series motors are available with 8 standard windings ranging from 9.55V to 48V. Customized windings also can be designed to optimize performance for a specific application requirement. The motors have standard pre-loaded ball bearings, allowing high speeds, radial and axial shaft loading, and higher temperatures. A new bearing support system, a 7 slot armature, and improved manufacturing techniques allow more balanced armatures resulting in very low vibration and audible noise characteristics. At low speeds, the motors exhibit very low cogging as a result of a optimized magnetic circuit design. Low vibration and low cogging makes the 8540 Series ideal for position control in servo applications.

Complementary products include gearboxes, encoders, and brakes. The motors have the capability of extensive customization including shaft configurations, leadwire assemblies, optional EMI/RFI filtering components, transmission components (shaft gears, pulleys, or sprockets) and a variety of brush materials (including standard graphite).

About Pittman Pittman is a unit of AMETEK Precision Motion Control. Pittman products are designed into a wide variety of high-tech motion applications, including lab automation, medical devices, communications equipment, semiconductor processing equipment, aerospace systems, and many other applications where precision motion is critical. The Pittman motor line spans a wide variety of DC motor sizes and technologies ranging from 12mm diameter brushless slotless DC motors used in high-speed medical applications to large NEMA frame DC servo motors used in sophisticated automation equipment. Pittman also offers a wide variety of complementary products such as gearboxes, encoders, brakes, and drive systems. For more information, visit
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User comments about this story


Hi Mr.,

How are you?

This is Naresh Jethwa from Delta Medical Equipment Services. Our company has been in the field of manufacturing & Marketing Medical Equipments in India for 9 years.

I'm looking for regular supplier of different types of DC geared motors. The size I'm looking for is minimum in diameter; length & minimum torque is 2.5Kg.

Please, kindly provide:
FOB price per piece:
Minimum order quantity:
Sample availability:

I would appreciate your early reply in advance.

Naresh Jethwa

By Naresh jethwa on Jan 19, 2012 04:58

Reply to this comment

Replies to this comment:

Pittman India Contact

Dear Mr.Naresh Jethwa,

Thank you for your enquiry for Pittman motors. Please note we have direct presence in India and we are based in Bangalore. Please send us details about your requirement

Speed -
Torque -
Input Voltage -
Annual Requirement -

We can offer the quote once we receive your input.

Thanks and Regards
Dinesh Dhananjayan

By Dinesh Dhananjayan on Jan 19, 2012 12:57


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