More than repairs and service 

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Bearing analysis

When a bearings rotates it give off a rolling signature which can be analysed to determine the overall condition. The signature is broken out into 4 discrete elements, the inner and outer race frequencies, the ball spin or roller frequency and finally the cage frequency. Therefore, for a given speed the bearing can be analysed and the condition verified against a database of known frequencies supplied by the bearing manufacturer.

Shock pulse measurement better known as SPM is our method of choice to analyse bearing condition.

Follow the link to read more about SPM as a method of machine condition monitoring.

Vibration Analysis 

Linear and rotary vibrations are the two main types of oscillation. In some cases vibration is desirable and necessary and used in conveying, speakers and mobile phones etc. In most other cases vibration is undesirable and requires corrective action to reduce noise and energy consumption.

Rotary vibration is caused when the axis of rotation and the axis of the spinning mass are not aligned. 

Vibration Analysis or VA, seeks to determine the error between these two axis and apply a corrective means of alignment to reduce or remove the level of vibration to within an acceptable tolerance. In most cases applying or removing a weight at a calculated distance and angle corrects most errors.

To understand vibration in more detail read this

We have been carrying out dynamic two plane and single plane balancing for over 25 years with various machines having a capacity up to 4.5tonnes.

So from a simple single plane narrow impeller to a complex spiral paddle beater we have the means and expertise to remove any imbalance. This extends to site work where our skilled engineers are able to undertake VA and corrective action on site.

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Electric motor mechanical sizing

Metric Motor Frame Sizing

  • There are 6 primary mounting options for standard motors, foot, flange, face, foot and flange, foot and face and finally radial
  • Two factors determine the size of any motor, the power in watts or Kilowatts (Kw) and the speed (rotational speed in rpm) determined by the number of paired poles. The slower the motor the larger the frame for a given power rating.
  • IEC metric motors ALL conform to standard frame sizes. The frame is the casing the motor is assembled into. To measure the frame size is easy on a foot mounted motor. Place the motor on a flat level surface, then measure from the surface to the centre of the shaft. This will be either 56, 63, 71, 80, 90, 100, 112, 132, 160, 180, 200, 225, 250, 280, 315, 355, 400mm these are the popular frame sizes, they go much larger
  • For a given frame size there will be a shaft diameter, to determine the frame size for motors that are NOT foot mounted cross reference the shaft diameters.
  • The main difference between a flange and face mounted motor is the hole types, flange are clearance holes while face flange have tapped holes.