what method to align engine shaft to driven plant ???

Discussion in 'Help Wanted' started by pp-admin, Mar 10, 2016.

  1. pp-admin

    pp-admin Member

    on every old generator or compressor or pump that i have seen where the engine is directly coupled to the unit being driven, its clear that great care was taken when it was new and first assembled to align the engine drive shaft with the unit being powered.

    i nearly always find carefully placed and worked out metal shims under old liser generators that are directly coupled and often lister also pinned the final mounting on each leg.

    my question is, before laser levels and computer chip based gadgets, what did the old factory workers do to align and set up the engine to the driven unit. this must be a problem as old as the industrial revolution !!!

    I am not an engineer (yes, i know that must come as a shock !!!) but i guess you have to align in all three axis ???.

    My only real skill is never giving up and also knowing where to find splendidly decent fellows who had a proper engineering apprenticeship !!!

    what is the idiot proof method that will result in perfect smooth running ???


  2. petternut

    petternut Administrator

    Google offers numerous methods.

  3. Victoria

    Victoria Member

    Make sure both driven and driving units are as close to level and in line as possible using a spirit level and a straight edge. With a DTI or in proper engineering parlance, a "clock" and a vee-base, clamp the clock to preferably the driving shaft and set a small amount of pressure on the spring-loaded pin of the clock. Carefully revolve the driving shaft , all the time watching the amount and direction of run-out between the two shafts and correct as necessary with firm but gentle clonks with a soft faced (rawhide( mallet. When there appears to be no run-out, the shafts now run concentrically, then tighten and pin-off each unit where possible. Easier to do than to describe but that's the accredited method.

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