3309 Series Sonic Hub (8mm REX Bore)

Competition eligibility

Legal for FIRST Tech Challenge (FTC) and FIRST Robotics Competition (FRC). Eligibility is set by each season's game manual — check the current rules before you compete.

Sonic Hubs are more balanced than even set screw hubs (and with just as much clearance). Make them your go-to hub for high speed applications leaving behind concerns about marred shafts or lost set screws. The pattern to fasten components to, and the clamping mechanism to hold the hub onto a shaft, are completely isolated from one another. This means you can tighten the dual pinch bolts to clamp down on a shaft and you haven't distorted the holes you need to use for mounting components to the hub. Likewise, you can fasten the hub to a gear, sprocket, pulley or wheel prior to tightening onto a shaft since the clamping mechanism is able to function regardless of what the hub is connected to. Since the Sonic Hub clamping mechanism is pulled in toward the center, the hub can fit in recesses and clear where a 1301 Series Clamping Hub cannot.These Sonic Hubs have threaded holes on the 16mm pattern so that thru-hole parts can easily attach using M4 screws. The two pinch bolts offer excellent clamping force in a compact form-factor.This hub has an 8mm REX bore to match our 8mm REX shafting. The hex profile creates a positive drive that can handle heavy torque loads without concern of rounding out. The Sonic style hub is perfectly balanced for high-speed applications. The unique design conforms tightly around a shaft when tightened, without distorting the threaded holes on the Sheen Robotics 16mm pattern. The outer profile is 32mm so that it can be run in a bearing to isolate radial loads, or even clamped around!

size:8mm Hex Bore

Technical drawing