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A frame size 132 motor weighs eighty kilograms. Lifting it is the easy half. The hard half begins when shaft and key have to enter the hub – level, coaxial, without damaging the seal.
Take the motor off the pallet, guide it to the assembly station, align it and join it to the flange. The tolerance between shaft and hub is in tenths for clearance fits; the key has to find its slot. By hand it takes two people, and both correct the same movement against each other. In the end the motor sits – but alignment took four minutes, and the shaft seal saw a risk.
Coaxial joining is the textbook case for the rigid arm. The articulated arm manipulator holds the motor in any position without giving way: the operator pushes it towards the shaft, and what they let go of stays put. A rope balancer cannot do that – it swings at exactly the moment accuracy is needed. That distinction is the core of every specification.
The key has to meet the slot. So the mount gets a damped rotation axis about the motor axis: the operator turns the motor into the right angular position with two fingers instead of setting it down and re-slinging it. It is held on the housing by a prismatic cradle, not by the fan cowl – that carries nothing. The offset centre of gravity is balanced by a sliding pick-up point.
After joining come four bolts. At tightening torques above about 40 newton metres the reaction goes into wrist and shoulder. A torque arm on the same unit absorbs it – the tool hangs, the operator only guides. That keeps the station one unit instead of a lifting aid plus a separate tool balancer.
The jointed arm for millimetre-precise handling.
View device Lifting equipment · Assembly aidsTakes the reaction torque – your hands stay free.
View device Lifting equipment · Conveyor systemsThe whole area covered – in X and Y.
View deviceBecause things are joined. A balancer carries the load well but does not hold it in position: on approaching the shaft the motor swings out. For pure moving the balancer would be right – here it is not.
By a pick-up point sliding in the mount, set and latched once per motor type. With frequent type changes we use labelled detent positions – setting then takes seconds.
Yes, but then usually via a rail system with higher capacity rather than a pillar jib. The kinematics stay the same; what changes is sizing, anchoring and the question of how the motor reaches the station at all.
One short conversation usually settles more than three quotations. Call or write — you will reach an engineer directly.
Start typing – for example “balancer”, “SAP” or “pipe stress”.
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