Week 6: Mounting Motors


In this class we will discuss various techniques of mounting servos, steppers, and DC motors.  As well as cover objects that can be mounted to said motors.


“Motoring what’s your price for flight” — Night Ranger


Show and Tell

We’ll review and discuss last week’s assignment.  What processes/techniques/tools did we use?  Any tips?  What would we change if we could do it all over again?


Tool of the Week

The metal hole punch is great for making very clean holes in sheet metal.


Tip of the Week

“Off the shelf is almost always better than custom parts”

Off the shelf parts are almost always cheaper, easier to work with, and just a better idea than custom made parts.


Mounting Motors

We are familiar with operating/controlling servos, DC motors, and steppers; but we may not be too experienced with using them practically or consistently in projects. There are numerous ways to mount motors as well as ways to attach things to motors.  Below are a few off the shelf and DIY solutions.



Servos typically have mounting holes, but I find them to be awkward when using them to screw directly into an enclosure or mount.  Store bought mounting options, although pricey, are worth the price for convenience and repeatability.

Vertical Aluminum Mounts

Aluminum Multi-Purpose Servo Brackets

Aluminum C Servo Bracket


Servo Plates


DC Motors

DC motors are cheap and easy to operate, but are tricky to mount into projects.  Typically, you will use a “toy” or “mini” DC motor in your projects.  Below are a few off the shelf options for various sized motors.


Size 130 Motor Mount

DC Motor Bracket for 130 size motors


DC Motor Plastic Mount


Self Adhesive Motor Mounts

Broom Clip

Motor Mount Swivel Clamp

Motor Mount – Clamping

Tetrix Max DC Motor Mount

Metal DC Motor Mount

DC Geared Motor Mounting Bracket Holder


TIP: When pulling DC motors from the junk shelf, KEEP THE SCREWS that came with them.  In fact, just leave them screwed into the motor.



Steppers typically have mounting holes in the front near the spindle.  Mounts are pretty straightforward but should be fairly robust to ensure accuracy in your mechanisms.

Stepper Motor Mount – NEMA-17 Sized



Mounting Things to Motors

Not only do you need to know how to mount motors, but also how to mount things to motors.  Below are a few off the shelf solutions.

Shaft Couplers


Set Screw Hubs


Gear Boxes


Hobby Gearmotors


Hobby Motor and Encoder Kit


TT Motor All Metal Gear Box – 1:90 Gear Ratio


GM Series Plastic Wheels


0.61mm 9-Tooth Pinion Gear

36/12-Tooth Spur Gear

DC Motor Compatible Wheels

40x7mm Wheels



Propeller 3 Blades


Two Blades

Computer Fans


Drill Press Drilling Tool (this one too)

Mini Drill Press

Servo Horns

These typically come with servos and if you need something fancy they can be found in many places on the internet, the trick is knowing that they are called “horns”.


Servo Pulley


Sail Arm


Servo Mount Gears


Servo Sprockets


Servo Shafts

Servo to Shaft Couplers


Servo Mount Wheels


785 Dual Gear Rack Kit


Gripper Kit



Timing Belt Pulleys

Timing belts and timing pulleys are typically used with stepper motors for precision devices (CNC’s, mechanisms, etc.).  The pulleys can mount directly onto the shaft of a stepper and the teeth of the pulley fit the teeth on the belt.


Stepper Motor with 28cm Lead Screw 



Motorized Slide Pot


DIY Solutions

Screw terminal blocks are a cheap electrical component that can be found at most hardware stores.  It is filled with little metal couplers that work great for connecting motor shafts to axles and rods.  The trick is getting the metal parts removed from the plastic.


Self Adhesive Cable Tie Mounts and Zip Ties


Laser Cut Panels and Standoff DC Motor Mounts

Sandwiching DC motors between to laser cut panels using standoffs is a quick and reliable method.

Illustrator File for DC Motor Mount

Illustrator File for Toy Motor Mount


Laser Cut Stepper Mounts

Using the laser cutter and acrylic bender you can make quick and dirty stepper motor mounts.  I do not recommend these mounts for precision devices.

Illustrator File for Stepper Motor Mount


Laser Cut Adjustable Tension Stepper Mounts

Using two laser cut parts (one stepper mount, one base) and some fasteners, you can create a mount that allows you to add tension by changing the position of the stepper.  Perfect for timing belts.



Full Motor Assemblies

You can even buy full motor/gear box/axle/wheel assemblies.


Tamiya Tracked Vehicle Chassis Kit


Tamiya 70168 Double Gearbox L/R Independ 4-Speed

 Tamiya 4WD Chassis Kit


Mounted Motor Projects

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In Class Demo

We will go over the sander, grinder, and bend.



For the last assignment you will be mounting a motor/servo/stepper (one or more) to something as well as mounting something to that motor/servo/stepper.  It can be completely DIY, or off-the-shelf components, or a combination of the two.

Everyone will present their project in class.

Post your progress and project to your blog.



Related Reading/Viewing

Di-Dah-Dit (enclosure, mounted servos, mechanisms, laser cut parts, the works)

361 Zimoun

Sheet Metal Box & Pan Brake Tutorial

PaperFoxTrot Satelites