Powerpole Contacts 45a

9 different offerings of our 25 Series Hub Sprockets. These are perfect for meshing with roller chain and finally getting that-thing-that-you-need-to-spin moving!

These aluminum sprockets work perfectly with 1/2 in. hex shaft and mesh with #25 roller chain. They are symmetrical and have the same sized hub on both sides so there's no wrong way to install them. The hub is also sized to ride on only the inner race of a bearing for smooth motion without binding or rubbing.

Specifications: 

• Material: 4140 Steel
• Diametral pitch: 20
• Pressure angle: 14.5 degrees
• Number of teeth: 17
• Pitch diameter: 0.85 inch
• Bore: 0.313 inch (8mm), with 2mm keyway
• Gear face width: 0.375 inch
• Weight: 0.04 pound

Everyone knows, Blue Nitrile Roughtop Tread is the best tread in the competitive robotics marketplace. This tread is the magic behind many top-performing robots. This tread is a ground-breaking 1.5 inches wide to fit wider profile wheels like our 1.5 inch wide XL Performance Wheels. Or, use this on your own custom wheels - now you don't have to custom-cut tread for your custom wheels!