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Service & Installation Overhead Crane Parts
 

Knowledge Base

General Crane Knowledge
 

Crane Glossary

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IDLER SHEAVE:
A sheave used to equalize tension in opposite parts of a rope. Because of its slight movement, it is not termed as running sheave.

IMPACT ALLOWANCE:
Additional hook load assumed to result from the dynamic effect of the live load.

INDUSTRIAL DUTY CRANE:
Service classification covered by CMAA Specification No. 70 and Specification No. 74, 'Specifications for Electric Overhead Traveling Cranes'.

INSULATION CLASS:
Motor winding insulation rating which indicates its ability to withstand heat and moisture.