IBS Balancing
Balancing — Frequently Asked Questions
What kind of parts need balancing?
Any part which rotates may require balancing. The purpose of balancing is to equalize as nearly as possible the distribution of weight around the rotating axis.
Why should I have my part balanced?
There are many reasons for balancing. Unbalanced parts cause vibration and stress in the part itself, and in the supporting structure. Balancing individual parts can accomplish one or more of the following:
- Increased quality of final product
- Minimized vibration
- Minimized audible and signal noises
- Minimized structural stresses
- Increased bearing life
- Minimize power loss
- Increase service life of your equipment
What is Single Plane Balance?
Unbalance that can be corrected by a single mass correction placed opposite the center of gravity in a plane perpendicular to the shaft axis.
What is Two Plane Balance?
A Two Plane Balance is two mass corrections in at lease two correction planes perpendicular to the shaft axis.
How do I know which one I need?
It is reasonable to assume that disc shaped parts, such as pulleys and flywheels, will have primarily force unbalance requiring only a single plane correction. The mass of the disc shaped part is concentrated near the transverse plane containing the center of gravity.
Conversely, the mass in a part having appreciable length will be distributed away from the transverse plane containing a center of gravity where as two plane correction is needed.
How do I figure out balancing tolerance?
A good general rule for standard balancing tolerance is the formula:
4W/N = R
W= Rotor Weight, N= Maximum Service Speed in RPM.
R = Permissible residual unbalance in ounce inch (for each corrected plane).
What are the methods of balancing?
There are various ways to correct unbalance. You can add or remove material. The design of the part will dictate the most practile means in determining the type of balance correction needed.
Methods of adding material:
- Weld, bolt on or rivet weight
- Use of solder or two-component epoxy
Methods of removing material:
- Drilling
- Milling
- Grinding
Feel free to contact us if you have additional questions! You can email us at info@indbal.com
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