In construction, machinery plays a crucial role, particularly in floor polishing where floor grinders are indispensable. However, any malfunction of the floor grinding machine during construction not only hampers the project's progress but also impacts the floor's quality and overall outcome.

Hence, as construction operatives, it's imperative to comprehend the typical faults and remedies concerning floor grinders in construction.

1. Abrupt Halting of the Floor Grinding Machine

Should the floor grinding machine cease functioning midway, initially inspect the power supply and the machine's wiring interface for normalcy. If the power is intact, assess the motor's condition for any signs of burnout. If all appears well, but the machine remains inoperative, evaluate whether elongated wiring or a thin power cord has resulted in insufficient voltage to drive the machine.

2. Uneven Grinding Disc

An uneven grinding disc induces severe vibrations during machine operation, leading to uneven flooring. This issue arises from loose screws connecting the grinding disc to the top.

The resolution entails adjusting the fixing screws of the grinding disc to alter its height, thereby ensuring uniform distance between any three points of each grinding disc and the gearbox bottom.

3. Deteriorated or Damaged Rubber Pad

Operational floor grinders may exhibit violent shaking due to impacts from hard objects, such as steel bars, during operation, resulting in rubber pad damage or deformation. Additionally, prolonged use causes plastic-made rubber pads to oxidise, losing their elasticity.

Consequently, a replacement of the rubber pad becomes imperative, typically done annually under normal circumstances.

4. Incorrect Axle Alignment

Inconsistent abrasive heights across various brands and models, coupled with varied friction levels between different surfaces and abrasives, can alter the machine's balance point.

5. Damaged Grinding Machine Bearings

Bearing damage manifests through noisy machine operation, shaking output shafts, and overall gearbox instability. This typically occurs due to aged gear oil or prolonged machine operation with unlevelled grinding discs, overloading and damaging the bearings.

In the event of bearing damage, the gearbox must be opened to identify the affected bearing part for replacement.