How to Choose a Gear Motor for Your Conveyor: A Step-by-Step Sizing Guide
H1:
How to Choose a Gear Motor for Your Conveyor: A Step-by-Step Sizing Guide
Choosing the wrong gear motor for a conveyor is one of the most common causes of downtime. If the motor is too small, it overheats, stalls, or burns out. If it is too large, you pay more, use more space, and may still have performance problems.
This guide is written for buyers who know their conveyor but do not know how to translate that into gear motor specifications. By the end, you will know how to calculate the output speed, torque, gear ratio, and environmental requirements for your application.
What You Need Before You Start
Before selecting a conveyor gear motor, collect these details:
Load weight: the maximum total weight on the belt
Belt speed: in inches per second or meters per second
Roller diameter: the diameter of the drive roller
Incline angle: 0° for horizontal conveyors
Starts per hour: continuous running or frequent start/stop
Power supply: voltage, frequency, single-phase or three-phase
Environment: indoor, dusty, wet, washdown, or outdoor
H2: Choose the Right Gear Type
The three most common gear types for conveyor applications are:
| Gear Type | Efficiency | Key Features | Best For |
|---|---|---|---|
| Helical | 95–98% | Quiet, smooth, high efficiency | Most continuous conveyors |
| Worm | 60–90% | High ratio, self-locking, compact | Inclined conveyors, space-limited setups |
| Planetary | 90–98% | High torque density, low backlash | Indexing conveyors, precise positioning |
For a standard continuous conveyor, a helical gear motor is usually the best choice. It runs cooler and
more efficiently than a worm gear motor.
FAQ
What size gear motor do I need for a conveyor?
It depends on load, belt speed, roller diameter, and incline. Use the steps above to calculate output RPM and torque first.
Can I use a worm gear motor for a conveyor?
Yes, especially if you need self-locking or a high gear ratio. However, worm gear motors are less efficient and generate more heat than helical gear motors.
Do I need a VFD for a conveyor gear motor?
Only if you need variable speed. For fixed-speed conveyors, a standard AC gear motor is usually sufficient.