Our Services

Dynamic Balancing

EL-Salam Workshop is specialized in on-site and in-shop balancing. We have solved the most intriguing problems on site (balancing, alignment) and balanced the most sensitive rotors in-shop.
 In-Shop Capabilities
Weight 80 gm - 90,000 kg (90 Tons)
Length According to the length of rotor
Diameter Up to 7m
All our balancing machines are of soft bearing type. The soft bearing balancing machine operate by rotating the workpiece at speeds above the natural frequency of the suspension system. The suspension system is soft and it has a rather very low natural frequency.
Why is soft bearing balancing machines the more sensitive type?
The free moving suspensions and support rollers provide a high degree of sensitivity because they do not restrain the free vibratory motion of the rotor. This provides for optimum balancing accuracy at low rotational speeds & linear response to unbalance vibration displacement throughout the balancing speed range.
TypeAdvantages Disadvantages

Low cost

Simple, safe  

Three-dimensional balancing

Static balance only

Limited by friction 

Soft bearing

Most sensitive type 

Rotor inertia absorbs energy of unbalance

Not affected by nearby activity Simpler electronics

High signal-to-noise ratio

Low-speed balance sensitivity

Can be relocated and set up elsewhere “Hand” calibration

Requires calibration for each rotor weight

Large motion when going through resonance 

Parasitic mass of suspension limits sensitivity 

Hard bearing

Permanent calibration

Absorbs high initial unbalance

Direct readout of unbalance 

No phase shifting

Cross-effect easy to deal with

More suitable for production because of low motion

Less sensitive

Requires massive foundation

Sophisticated electronics

Affected by nearby activity

High-speed operation dangerous


vibration into floor

Not suitable for moving around

Excerpt from “Machinery Vibration:Balancing”
"The best spectrum analyzer in the world and the most powerful expert diagnostic software will not solve a single vibration problem. A competent person with good problem solving skills is needed to apply the data that instruments provide. Eventually, someone with toolbox must fix the vibration problem. In that toolbox must be a variety of corrective methods that match the variety of possible problems. Unbalance is the most common cause of excessive vibration and balancing tools will occupy a major portion of that toolbox " - Machinery Vibration: Balancing.
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