Motor FAQ - real questions from real projects
These are actual questions our customers asked the MakerMotor AI assistant, with the short answers. For anything specific to your build, ask the assistant directly - it runs the math for your numbers.
What size DC motor do I need to lift a given weight?
Torque needed (in newton-meters) is the weight in kg times 9.81, times the radius in meters of the drum or pulley the rope wraps. Add 50-100% safety margin for gearbox friction, then pick a gearmotor whose rated torque meets that and whose speed gives your lifting speed at that radius. Our Motor Sizing Calculator for Lifting Weight runs this for you, or ask the AI assistant with your exact weight and speed.
How do I identify the specs of an old or unmarked motor?
Numbers printed on a motor body are usually date or batch codes, not rated specs - the nameplate label (if present) carries voltage and current. Practical approach: measure shaft diameter and body size, note the voltage printed on any label, then test briefly at that voltage unloaded to confirm direction and speed. Send the AI assistant your label text and measurements and it will match you to a modern equivalent from our catalog.
What voltage and amperage are safe to run a motor at?
Stay at or below the rated voltage listed on the product page, and size your power supply for at least the listed maximum current plus headroom. Starting or stalling draws several times the running current, so a supply rated well above running current prevents brownouts. If you are unsure, describe your power source to the AI assistant and it will check the match.
Which speed controller works with your gearmotors?
Our brushed DC gearmotors pair with PWM DC motor speed controllers - match the controller current rating to the motor maximum. For simple forward/reverse without a controller, a DPDT switch such as the SWDPDT10A handles direction changes on small motors. The AI assistant can confirm a specific motor and controller pairing before you order.
Do you provide CAD files (STEP/STP) for your products?
Yes - CAD files such as STEP/STP for specific SKUs (for example PWM12V25A) are available on request. Ask in the AI assistant chat with the product code, or email sales@makermotor.com, and the team will send the file.
Do you ship internationally?
Yes - we ship worldwide from our California warehouse. Place the order directly on makermotor.com and shipping rates and delivery times are calculated at checkout based on your address.