The motor is the component responsible for actually driving a shredder's cutting blades, and when it fails or underperforms, the entire unit becomes unusable regardless of how well-maintained the rest of the machine is.
Common Motor Faults
Motor repair requests typically involve units that won't start at all despite being powered on, motors that run but lack sufficient torque to pull paper through the cutting mechanism, and overheating that triggers automatic shutdown faster than the unit's rated duty cycle should allow. A burning smell during operation is a more serious warning sign, often indicating the motor is under significant strain or close to failure.
Diagnosing Motor Issues
A shredder that hums or attempts to start but doesn't engage the blades often has a motor or drive mechanism fault rather than a blockage, which can be distinguished from a jam by checking whether the cutting chamber itself is actually clear before assuming a motor problem. Testing under both light and heavier paper loads also helps identify whether the fault is a complete failure or simply reduced power under strain.
Overheating and Duty Cycle Considerations
Every shredder motor is rated for a specific continuous run time before it needs to rest and cool down, and exceeding this duty cycle regularly accelerates wear and increases the likelihood of motor failure well before its expected lifespan. Offices with high shredding volume sometimes benefit from a higher-duty-cycle unit rather than repeatedly straining a lower-capacity motor beyond its intended use case.
Repair vs Replacement for Motor Faults
Some motor faults, particularly those involving worn brushes or minor electrical connections, are repairable at the component level. More extensive motor damage, especially from prolonged overheating or burnout, typically requires full motor replacement rather than a partial repair.
Estimated Cost of Motor Repair Services
| Service | Approximate Cost (KES) |
| Diagnostic assessment | 1,000 – 2,200 |
| Motor component-level repair | 2,500 – 5,000 |
| Full motor replacement | 4,000 – 8,500 |
| Duty cycle and load testing | 800 – 1,800 |
Book a Repair
A motor that struggles or won't start needs prompt, proper diagnosis. Bestcare Facilities Management carries out motor repair for office shredders across Nairobi.