Description

Kirby Carbon Brushes 2x for Kirby Vacuum Cleaner Motor

Kirby Carbon Brushes 2x ensure the electrical current transfer between the stationary and rotating parts of the electric motor. Because these components are in constant contact with the rotating commutator of the armature, carbon brushes are subject to normal wear and should be replaced in time.

These carbon brushes are universal and suitable for every Kirby vacuum cleaner:

• Avalir Platinum
• Avalir 2
• Avalir 1
• Sentria 2 (G10D)
• Sentria 1 (G10)
• Ultimate G Diamond Ed. (G7D or DE)
• Ultimate G (G7 or UG)
• Generation 6 (G6)
• Generation 5 (G5)
• Generation 4 (G4)
• Generation 3 (G3)

What are Kirby Carbon Brushes 2x?

Carbon brushes are small blocks made from a specially formulated carbon and graphite material. While the motor is running, they press against the copper segments of the commutator. This allows electrical current to be transferred to the rotating armature.

Because Kirby motors operate at high speeds, the dimensions of the brushes are not the only important factor. Their hardness, material composition and electrical properties must also be precisely matched to the motor. Therefore, carbon brushes are not simply universally interchangeable.

Wear of the carbon brushes

Continuous contact with the commutator creates friction. As a result, the brushes gradually become shorter during use. This wear is normal and unavoidable.

When a carbon brush has worn down to approximately one-third of its original length, replacement is recommended. In addition, carbon brushes are generally replaced as a pair so that both sides of the motor maintain the same current transfer and wear characteristics.

Symptoms of worn Kirby Carbon Brushes 2x

Worn carbon brushes can cause several problems. For example, the motor may begin to run intermittently or unevenly. In addition, motor performance may decrease or the motor may run at an abnormal speed. Excessive sparking or heat development can also indicate worn or poorly fitting brushes.

Therefore, if these symptoms occur, check not only the carbon brushes but also the commutator of the armature.

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Product Contents and Compatibility

This version is suitable for virtually all modern Kirby Generation models. The dimensions and material composition are specifically matched to the relevant Kirby motors. The carbon brushes are supplied as a set of two and, depending on the version, include the corresponding white plastic holder and metal spring clip.

They can be used with Kirby Generation 3 (G3), G4, G5, G6, Ultimate G7, Diamond, Sentria 1, Sentria 2 and the various Avalir models, among others.

Do not use imitation carbon brushes

Do not use arbitrary universal or imitation carbon brushes in a Kirby motor. The length, width, thickness, shape and, most importantly, the hardness of carbon brushes can vary considerably.

A brush that is too hard can cause excessive wear to the copper segments of the commutator. Conversely, a brush that is too soft can wear down too quickly and cause excessive sparking. In either case, the armature may eventually become damaged.

The electrical properties are also important because the brushes must be matched to the voltage, motor power, rotational speed and required current transfer.

Check the armature before installation

Before installing new carbon brushes, always inspect the surface of the commutator. If the copper segments are burnt, rough or uneven, new brushes may wear down very quickly again.

Therefore, a damaged surface should first be inspected and, where possible, properly smoothed or polished. A suitable Kirby commutator stone can be used for this purpose. The new carbon brushes can then wear in evenly against the commutator.

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