10.1 State ONE effect of overloading on EACH of the following machines: 10.1.1 Power saw 10.1.2 Bench grinder 10.2 State ONE negative effect of friction on EACH of the following components: 10.2.1 Drill bit 10.2.2 Roller bearings of a rolling machine 10.3 State TWO general maintenance guidelines for a punch and shearing machine - NSC Mechanical Technology Welding and Metalwork - Question 10 - 2019 - Paper 1

Overloading a bench grinder can result in a malfunction due to excess stress on the spindle bearings, grinding wheel, and machine motor. This excessive load can cause the grinding wheel to wear out unevenly, shortening the lifespan of the equipment.

A negative effect of friction on the drill bit is that it generates heat, which can cause the cutting edge of the drill bit to soften or blunt. This will ultimately reduce the lifespan of the drill bit.

Friction can cause the journals and bearings of a rolling machine to prematurely wear out. This can lead to mechanical failures and increased maintenance costs.

1. Check the condition of the switch gear, wiring, and isolation to ensure safety during operations.
2. Ensure the isolator is lockable to prevent accidental starts while maintenance is being performed.

1. Recordkeeping allows for monitoring of the machine's condition, which helps in timely maintenance.
2. It ensures compliance with warranties and guarantees, providing documented evidence of service history.