HMR-5022 Hammersaw Motor (BETA)

Legendary RDY-5022 - now with Single Arm Support

Lots of blade design CAD files are now available for free! Note: a blade is not included with the purchase of a motor. Motor CAD is here.

While the RDY-5022 V2 has proven to be the go-to choice for hammersaws in recent years, one common modification was often made - a drilled-through stator mount allowing use of a shoulder bolt through the motor center. We've decided to make a special version for the 5022 for single-arm hammersaws and other single side supported applications, which adds this change out of the box - plus another big one. The blade mounting is reversed to make the lever arm as small as possible when delivering a hit, making arms twist less, and more force is just piercing top plates. 

We're looking to get a small batch beta tested so these are going at a reduced price, and there is a limited stock available. 

What's Included when you buy a Complete Motor:

• 1X HMR-5022 complete motor!
• 1X 6mm x 30mm Shoulder Bolt with M5 thread
• 1X M5 Lock Nut
• 3X Shoulder Bolt Spacers (0.032", will be metric for future versions)

The 4-inch ripsaw blade shown is not included, but is sold separately. 

This motor is intended to be mounted to a rigid robot frame component and as such does not come with a mounting plate or bracket.

Specs and Usage

Specs

• Motor internals and specs are identical to the existing RDY-5022
• Weighs just 70.1 grams without the shoulder bolt, or 82.4g with the shoulder bolt and three spacers
• Only 1700kV for this batch, but possibility for more later
• 2024-T3 aluminum hub, 6061-T6 blue stator support
• Epoxied magnets, windings, and cable retention inside the motor
• CAD coming soon
• Video for blade installation here

Warning: The outside of this motor is like a big heatsink and can get very hot!

Power and ESCs

For best results, pair with our very own Tekko32 ESC, AM32 firmware pre-programmed. Note this ESC is programmed singe directional out of the box, but can be switched to bidirectional using a USB Programmer. 

Actual current draw and torque are highly dependent on your exact ESC and configuration, battery, voltage, and loading. Air resistance and tip speed for your weapon play a huge role in the current draw of your system. Even reducing speed by 20% might cut air resistance in half. 

Click here for the test data spreadsheet:

Disclaimer

Warning: combat robots are not toys! They are extremely dangerous. Click here for a safety video.

Testing a robot with an active spinning weapon should never be done while maintaining a line of sight with the robot. Ideally, you should be testing inside an enclosed box or arena with at least 1/4" thick polycarbonate windows or top to see through, and 1/2” or thicker plywood or MDF construction. Operation (Including testing) outside of a suitable arena or test box could cause serious injury. By purchasing this product you acknowledge that you are responsible for the safe use of this product and that Team Just ‘Cuz Robotics or its employees are not liable for any injuries or damages.