What is shaft alignment tolerance?
What is shaft alignment tolerance?
A Shaft Alignment Tolerance is the maximum amount of misalignment the shafts can tolerate before they begin to transfer radial and axial loads to the bearings, seals, gears, and other affected machine components.
What is the maximum allowable tolerance when you do shaft alignment?
Acceptable precision shaft alignment tolerances for 1800 RPM are 0.7mils/1” angular and 4.0 mils offset. The coupling manufacture’s alignment tolerances for the 1070T grid coupling (installation limits) are from the installation and maintenance instructions found on the manufacture’s website.
How do you align a shaft coupling?
A coupling is correctly aligned if a straight-edge laid across both coupling halves parallel to the shaft maintains the same distance from the shaft at all points around its circumference. In addition, the axial distance between the coupling halves should remain the same at all points around the circumference.
Why must pumps and motors be properly aligned at the couplings?
Motor-Pump alignment is critical for these reasons: It minimizes the forces of misalignment acting upon the bearings and seals of both components. It minimizes wear of the coupling. It maximizes the life of the machine components by minimizing wear, increasing time between failures, and reducing vibration.
Why choose John Crane for power transmission?
Whether you are operating remotely in the cold, sub-zero of Alaska, the dusty heat of the Middle East, the corrosive environment of the North Sea or in areas of high humidity, John Crane’s broad range of power transmission couplings for the global oil and gas industries are designed to operate safely and reliably.
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