Dynamic Balancing: What is it and how does it work?

What is Dynamic Balancing?

Dynamic balancing definition: “Dynamic balancing is a way of balancing machines by rotating parts quickly and measuring the imbalance using electronic equipment. The imbalance measured can then be corrected by adding or subtracting weight from the rotating parts until the vibration is reduced.”

Basically, all machines have some form of residual vibration. Enormous vibration in rotating machinery can cause high levels of noise and more importantly, significantly reduce the life of components. So, the ideal thing to do would be to remove all causes of vibration and allow the machine to run completely smooth. The process of balancing is the removal or addition of weight to the device, so that this effective mass centre approaches the true axis.

In addition to dynamic balance, there is also static balance. When a part is statically balanced, the centre of gravity is on the axis of the rotation. This means the part will stay stationary at a horizontal axis, without the application of braking force. It also has no tendency to rotate due to the force of the gravity.

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    Our dynamic balancing machine and procedures

    We provide balancing services to companies in the UK who have rotors, fans, impellers or shafts that need to be balanced dynamically. Our dynamic balancing machine can handle loads of up to 500Kg, up to 3 metres in length and can balance them down down to ISO G1, which is the finest grade of balance. We can balance any item up to a service speed of 100,000 Rpm.

    After the job is completed, we will deliver all items back to you, with the addition of a balancing certificate highlighting the initial and residual out of balance readings.

    "I have used Bellwood Rewinds for many years to carry out motor and generator repairs, as well as supplying hire generators. I find them very helpful and most of all on time every time even on matters of an urgent nature. I would have no concern with recommending their services to anybody."

    - James Simpson

    Dynamic balancing service

    At Bellwood Rewinds Ltd, we pride ourselves on the in-house dynamic balancing service we offer to customers throughout the UK. Our balancing service can help to reduce the wear and tear of moving components. Keeping the components of your machinery well balanced can help to avoid machinery breakdown; saving you money in the long run.

    Our Cemb Hofmann machine can assist with all your balancing needs. The machine itself can balance any rotating part up to 100,000 rpm. The technology allows us to identify wearing parts to create a more balanced object, which in turn means improved quality and productivity of machinery. Cemb Hofmann is one of the best dynamic balancing machine manufacturers in the industry, offering peace of mind that you are in safe hands.

    Bellwood Rewinds are leaders in dynamic balancing

    We offer 24/7 Emergency In-House Dynamic Balancing Services at our North East base. One of our experienced engineers will always be on hand to take your call, no matter what time of day it is, talking to you about your balancing needs. We have decades of experience and have balanced a diverse range of rotating items in this time, including rotors, impellers, shafts and fans.

    Get in touch for dynamic balancing

    If you seek any further information about our company or our sales and repair services, please visit our Help and Advice page.

    Balancing your parts

    The balance service we offer covers everything from fan balancing to shaft balancing and much more. Whether you need individual balancing or bulk balancing, our team of specialists are on hand to help. With a highly proficient dynamic balancing machine, we can be sure to provide a professional and efficient service, each and every time.

    We typically carry out fan balancing, shaft balancing and rotor balancing, but we cover a vast range of other parts. If the part rotates then we’ve probably already balanced it.

    As one of the UK’s leading providers of dynamic balancing, we are the perfect partner to help balance your parts. Offering a nationwide dynamic balance service (carried out in-house at our balancing facility), there’s no reason why you would look elsewhere to have your parts balanced.

    Reasons you might require dynamic balancing

    • To remove dirt build-up
    • Impeller erosion
    • Internal part corrosion
    • Casting imperfections, voids and inclusions
    • Mismatched lengths of keys and keyways
    • Thermal and mechanical distortion
    • Shifting mass due to loose parts or poorly tapered hub fits
    • Previous balancing attempts have been unsuccessful
    • Parts haven’t been assembled properly
    • Noise reduction
    • Vibration reduction/elimination
    • Increased performance
    • Extended motor life

    (How balancing machine works: 1=hard-bearing, 2=soft bearing, 3=spring, 4=vibration sensor, 5 & 6=balancing planes, 7=rotor)

    Frequently Asked Questions About Dynamic Balancing

    I've heard balancing can mask other problems, is this true?
    No, this isn’t true. In fact, balancing can’t be carried out on things that have inherent faults. In addition to this, a balance that incorporates a vibration survey often identifies other vibrations and can pinpoint the vibration of specific parts. Dynamic balancing can help to ensure your parts are working as they should be.
    What can balancing be carried out on?
    Our dynamic balancing machine allows us to balance a range of parts, including fans, rotors, shafts and much more. If a part rotates then we’ll be able to balance it.
    Who can benefit from balancing services?
    We offer our dynamic balancing services to customers throughout the UK. Our in-house balancing service means we can help both local and national customers.
    What's the difference between static and dynamic balance?
    Dynamic is when a part rotates, and needs balancing to stop rotation. Static is when it stays still. For more information, we have a guide on the differences between static and dynamic balance.
    What is dynamic balancing?
    Dynamic balance refers to the way machines are balanced by rotating parts quickly and measuring the imbalance using electronic equipment. The imbalance measured can then be corrected by adding or subtracting weight from the rotating parts until the vibration is reduced.

    Call for more information

    We offer 24/7 Emergency Balancing Services in-house at our North East base. No matter what time of day it is, one of our trusted engineers will always be on hand to take you call and talk to your about your balancing needs. We have decades worth of valuable experience from working within the diesel generator and motor repair industry, and have balanced a diverse range of rotating items in this time, including rotors, impellers, shafts and fans.