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The Pittman 8540 series of brush-commutated DC motors from Ametek is suitable for applications ranging from data storage and medical equipment to semiconductor processing and automation machinery.

The Pittman 8540 motors are claimed to compare favourably with their similarly sized conventional counterparts by exhibiting improved power density from bonded neodymium magnets and offering higher-performance power solutions in a compact and lightweight design.

The motors are available in three lengths – 2.114in, 2.585in and 3.057in – weighing from 4.66oz to 7.55oz.

Depending on the model, they can achieve continuous torque from 2.5oz-in to 8.3oz-in without heatsink.

The speed, voltage, current and torque characteristics can be varied and a selection of standard windings enables optimised performance tailored to particular application needs.

The brush system for the Pittman 8540 series motors delivers reliable and consistent performance over a longer life thanks to robust brass brush tracks that keep brushes aligned, constant-force springs that provide optimum brush pressure and larger brushes offered in a choice of materials (including standard graphite), according to the company.

The motors exhibit very low magnetic cogging (or reluctance torque) owing to an optimised magnetic flux profile promoting smooth operation and precise positioning control in servo applications.

They are equipped with pre-loaded ball bearings to accommodate high speeds, radial and axial shaft loads and temperature extremes.

A newly developed bearing support system and related construction techniques yield inherently more balanced seven-slot armatures and help to minimise vibration and audible noise.

Complementary products include gearboxes, encoders and brakes, and motors can be customised with various shaft configurations, lead-wire assemblies and transmission components (gears, pulleys or sprockets).

All Pittman 8540 series motors incorporate an integral header, enabling the use of a wider choice of lead connection configurations and facilitating installation.

Ametek Technical and Industrial Products

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