Dear Yahappan,
Maximum Overtime Allowed Under the Factories Act
The maximum amount of overtime allowed as per the Factories Act in a quarter is 50-54 hours. In exigencies, the factory can request the Chief of Factory and Boiler for an enhancement by some more hours. The authority may or may not allow this after studying the workmen's health and hygienic conditions.
Why More Overtime May Be Needed
Why do we need more overtime hours than the prescribed limit is a big question. The prescribed limit of OT hours was fixed at a time when most factories had poor technology, but now the scenario is completely different. In view of that, it is presumed either the factory runs with old machinery, there is low productivity of man and machines, or it is running with low manpower, which is a subject of study.
Exemption of Overtime
Why do you want an exemption of OT? OT can't be demanded and is controlled by management. It is a regulation that allows the factory to utilize the available manpower for extra hours of working in an exigency or emergency. Further, your management can form a policy or rule to curtail the overtime hours.
Understanding Worker Demands
Your post gives me an understanding that workers may be demanding OT as extra income; this is a common scenario across industries. The management needs to compensate if there is a low rate of payment. Therefore, you need to conduct a time study and motion study, both techniques used to improve work efficiency and productivity. If required, management can consider piece-rated wages. Hopefully, you have the reply.