Description

CEM Carbon Brushes

We would advise a spare set of Carbon brushes are kept onboard for each motor so that uninterrupted service can be achieved for your product

A brush or carbon brush is an electrical contact that conducts current between stationary wires and moving parts, most commonly in a rotating shaft. Typical applications include electric motors, alternators and electric generators. The lifespan of a carbon brush depends on how much the motor is used, and how much power is put through the motor

CEM scollop the brush base so that it fits snugly with the commutator and allows for the highest surface area for power transfer and extending their life

We normally expect the life of a set of brushes to be around 1,000-2,500 hours operation but the life is affected by a number of factors including:

• Cycling (on/off cycles)
• Moisture levels
• Duty of the motor (amp absorption)
• RPM of motor

CEM Carbon Brushes

For certain types of electric motors or generators to function, the coils of the rotor must be connected to complete an electrical circuit. Originally this was accomplished by affixing a copper or brass commutator or ‘slip ring to the shaft, with springs pressing braided copper wire ‘brushes’ onto the rings which conduct the current. Such brushes provided poor commutation as they moved from one commutator segment to the next. The cure was the introduction of ‘high resistance brushes’ made from graphite (sometimes with added copper). Although the resistance was of the order of tens of milliohms, they were high resistance enough to provide a gradual shift of current from one commutator segment to the next.

Brushes need to be replaced in order to get the optimum performance of your motor…

Carbon brushes are available in four main grade categories:

• carbon graphite
• electrographitic
• graphite
• metal graphite

The term brush remains in use. Since the brushes wear out, they can be replaced in products intended to allow maintenance

About CEM Pumps and Blowers

Established in 1970 C.E.M. elettromeccanica S.r.l. has been a leading manufacturer of electric pumps and DC motors primarily focussed for use in the maritime sector
In the 48 years, we have been making motors and our constant expansion in the national and the international markets have resulted in the broadening of our extensive product range

…highest quality materials…design…innovative production processes…remarkable lifespan…

This makes us the ideal partner for large and medium-sized boat builders of pleasure, fishing and military vessels.

CEM Pumps and blowers factory

Our extensive range now includes:

• DC and AC electric pumps
• Belt driven pumps, with manual or electromagnetic clutch
• hydraulically driven pumps
• water pressure systems
• centrifugal and axial blowers
• diesel driven pumps
• manual pumps
• DC motors

Our commitment to using the highest quality materials used, the special care invested in the design and in the innovative production processes we adopt, we are able to offer excellent performances and a remarkable lifespan of our products exactly what you need when our product can offer extra hours of safety when in difficulty

The CEM factory is based in Nonantola close to Modena in Italy, and is a family-owned business with generations of experience in the manufacture of pumps, blowers and electric motors

All of our products are built to standards that are in accordance with classification and certification can be obtained from each of the bodies: Bureau Veritas, Det Norske Veritas (DNV), Lloyd’s Register and RINA