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Call Us: 1-877-352-4739 |
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Commutator Information:
What Commutator Sizes Do We Have?
.50-1.00" Bore
Power in a small commutator unit
The smallest UEA commutator is designed for applications requiring few
conductors with higher power needs. Its compact diameter facilitates higher current requirements
in a limited space.
1.50" Bore
The Standard Bearer for all UEA Commutators
The UEA 1.50" bore is the original commutator our competitors have tried unsuccessfully
to copy. This commutator is the standard by which other designs are judged in the
industrial, heavy equipment and machinery industry.
The 1.50" bore UEA commutator has proven its worth. It will work in harsh conditions and
environments where other, lesser quality commutators fail. However, in addition to the
ability to handle rugged uses, the UEA 1.50" bore commutator has proven its superior performance
in today's high-tech world of audio, video, data and electronic signals through continuous
rotation.
2.50"-4.00" Bore
The unique design of UEA's 2.50-4.00" bore commutator means outstanding quality, performance
and economy for the customer. These powerful commutators, which can be easily installed
and serviced in the field, are available in four standard bore sizes.
6.00"-8.00" Bore
UEA large bore commutators were specifically designed for applications requiring large
center passageways. They have all the features and performance capabilities of
the S15 model.
10.00"-14.00" Bore
UEA designed this 10-00"-14.00" large bore for customers who need an extra large bore
commutator. Because we custom build UEA commutators out of standard components, these UEA
commutators meet customers' demands for specific applications that require large center
passageways, including storage silos, waste treatment facilities, custom machinery, machine
tools and pedestal cranes.
Electronic Condition Circuitry Testing
 Brush Testing
Brush Test UEA has done testing to compare various brushes and ring material combinations
to determine the operating characteristics and advantages or disadvantages
of each. The test data showed that the noise generated in a slip ring assembly
will vary in direct proportion to the level of current through the brush to ring
interface.
Ring Performance Testing
To evaluate ring performance with regard to possible applications in the instrument class
slip ring market, a 15 amp circuit, 1.50" bore ring was selected. Tests were designed to
bring out operational parameters for determining applications. The test data indicated
that slip rings used on instrumentation applications produced highly satisfactory results.
Commutator Material Application Guide
 When choosing the appropriate slip ring for an application several factors are involved.
Usually the first things to consider are the voltage and current levels. For power circuits
(high voltage and current) this is very straightforward. The circuit
is chosen to meet or exceed the voltage and current levels present.
When dealing with low-level signal circuits there is another factor to consider. The primary
obstacle at low levels is noise. Electrical noise is defined as an undesirable variation
in the voltage or other characteristic of an electrical signal. This undesirable variation
can originate from outside the circuit (induced) or from within the circuit (generated).
It must be kept in mind
that environmental factors must be taken into consideration for selections not
just signal performance. For example in a hostile environment such as a high moisture or
a corrosive atmosphere, or an application that sees long periods of non-use, a higher grade
material may be needed to reduce surface degradation.
Basic Commutator Material Descriptions
1. STANDARD CIRCUITS
The standard commutator circuit consists of a pair of sintered metal copper/graphite brushes
making contact with a brass ring. The least expensive solution
and sufficient for most applications including low level audio, video and network* signals
when used in protected areas and frequent use.
2. EXTENDED PRESSURE CIRCUITS
The extended pressure commutator circuit is a standard circuit with the brush profile/radius
changed to increase the surface pressure in the contact area. This provides better cleaning
action and tighter contact for a quieter interface than the standard circuits. The tradeoff
is shorter life in high cycle applications.
3. SILVER BRUSH CIRCUITS
The silver brush circuits are a pair of silver graphite brushes on a standard brass ring.
This gives a signal that is very comparable to the full silver circuits at a lower cost.
4. FULL SILVER CIRCUITS
The full silver circuits are a pair of silver graphite brushes on a coin silver or silver
plated ring. This is the ultimate circuit with the highest cost due to the precious metal
ring. This circuit will provide a clean signal even in applications of long periods of
non-use and moderately corrosive environments.
Customizing your Commutator
UEA commutators have to work in applications with widely different types of electrical
loads and data signals, as well as in a variety of environmental
and operating conditions. Working closely with the OEM or the end user, we get as much
insight as possible into each application in order to evaluate the needs and potential
problems that might arise in the particular situation. Please describe the conditions of
operation as accurately and completely as possible so that we can supply you with a product
that will perform well and meet your highest expectations. United Equipment Accessories
offers only the finest in electrical components-custom commutators built to last.
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