Replace Motor Carbon Brushes

Personal safety at all times

First and Foremost Electric Shock Can Kill

Attention! Electric Shock Can Kill! Before you do anything else, before you remove the cover of any electrical appliance. If it is your intention to carry out work, make certain that the power is switched off, preferably at the consumer unit, main isolation switch. Then, also remove the plug from the electricity supply socket before proceeding with any work or investigation! Once the plug is out and the plug is within your sight and reach you know that you are safe. As a further precaution you could actually remove the fuse from the plug which would make it belt and braces safe, even if someone accidentally switches the power on again or replaces the plug into the soc ket.

Information to help you to Replace motor carbon brushes

Helpful information on how to replace motor carbon brushes in general terms, applies to no particular brand of carbons!

You are going to examine the motor carbon brushes and successfully replace them!

Before you start to Replace Motor Carbon Brushes a bit of useful info

Carbon brushes are used in motors of the type known as "Universal" motors, this is because they will run equally well on AC or DC current. Carbon brushes come in all shapes and sizes, they are usually, but not always, sold in pairs, and come with enormous variations in the material composition of the brushes themselves. This composition is usually made up of copper and carbon, and depending on the manufacturers' requirements may have different proportions of copper to carbon depending on the hardness or softness of brush that the manufacturer has specified. More copper, the harder the brush and therefore more hard-wearing, conversely more carbon and less copper the softer the brush so wears more quickly. The manufacturer of the motor determines the specification of the brush, depending on the hardness and quality of the motor commutator, the speed and the power rating of the motor, always trying to strike a balance between long life and not doing too much damage to the commutator during the life cycle of the motor, and allowing the brushes to brush against the rotating armature without wearing out too quickly.

Carbon brushes should be replaced regularly to achieve maximum life from the motor, similar to oil in a car engine, it is too late when the brushes have worn down to the very end and the copper retaining strap and the spring have begun rubbing on the commutator and worn a groove in the center of it, so checking the motor carbon brushes should be a priority of every service check.

When it comes to actually changing the motor carbons it is always best to use a good quality brush set, if the brush is inside a plastic housing, check that the brush is free to slide in and out of the unit and has a good amount of movement. Check also that the connection on to the connector tag is a good tight fit, it is no good being a loose fit as it will only burn or at the very least get hot at this point, poor connections mean heat in everything electrical and heat means at worst, burning, and at best, loss of power in the motor. Check also that the motor commutator is not too badly worn and that the surface of the copper is not scarred or grooved as if this is the case it may well not be woth while to replace motor carbon brushes at all and a better investment would be to purchase a new replacement motor.

How to Replace Motor Carbon Brushes Sorted

Hope this helps, and good luck with your repair project!

Remember! Always remove the plug from the mains electrical socket before proceeding with any work or investigation!

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