What should be permanently marked on jacks?

Permanently marking the maximum load capacity on jacks is critical for ensuring safe usage. This information serves as a vital safety measure, allowing users to understand the limits of the jack's lifting capabilities. By clearly indicating the maximum load capacity, operators can avoid overloading the jack, which could lead to equipment failure, accidents, or injuries.

Knowing the maximum load capacity helps users make informed decisions about the weight they are lifting and ensures compliance with safety regulations. This marking also plays a significant role in training and educating individuals about proper jack usage, reinforcing the importance of using equipment within its designed limits to maintain both personal safety and equipment integrity. While the manufacturer's name, date of manufacture, and weight may provide useful information for identification and maintenance, they do not directly impact the immediate safety of the jack in the same way that knowing its load capacity does.