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Related Manuals for Grin Technologies Torque Arm V7
Summary of Contents for Grin Technologies Torque Arm V7
- Page 1 Torque Arm V7 Installation Guide Rev 1 The Torque Arm V7 Installation Guide Rev 1 Clamping Model for Regen Hubs with 12mm Axles Front and Rear Compatibility Grin Technologies Ltd Vancouver, BC, Canada (604) 569-0902 email: info@ebikes.ca web: www.ebikes.ca Copyright © 2023...
- Page 2 Rev 1 1 Introduction Thank you for the purchase of Grin Technologies Torque Arm V7! This device helps positively lock M12 axles on regen capable hub motors against the back and forth rotation caused from alternating forward and reverse torques.
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Page 3: Principles Of Operation
Eventually this back and forth play will get more serious and result in axle nuts coming completely loose. The Torque Arm V7 solves this issue by putting an enormous preload clamping force on the axle flats. A sliding block of 17-4 hardened stainless steel compresses the axle from the tightening of two screws so that high axle torques do not result in any noticeable rotation. -
Page 4: Installation
3.1 Determine Install Position There are several potential orientations for our Torque Arm V7. It can fit on either the left or right side, and either in front of or behind your tubing, and the clamping block can be under or on top of the arm. - Page 5 Torque Arm V7 User Manual Rev 1 3.3 Determine Arm Angle Slide the clamping block loosely over the motor axle and place the V7 arm on the block to determine which spline position aligns with the frame clamp. Note the angular position of the insert in the splines.
- Page 6 Torque Arm V7 User Manual Rev 1 3.5 Reinstall Hardware If the dropout slot has lawyer lips, slide the minimum number of 'C' washer(s) as a spacer directly over the dropouts. This ensures that the wider torque arm piece clears the protruding lip and sits flat. The kit includes 1, 2, and 3mm thick washers to permit spacing up to 6mm total.
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Page 7: Additional Notes
4.4 Insufficient Axle Length The clamping block in the Torque Arm V7 is 11mm thick. This ensures that the clamping force is spread over a sufficiently wide area of the axle flats, but it also reduces the amount of threads available for the axle nut. -
Page 8: Suspension Forks
5 Limitations The Torque Arm V7 greatly increases the safety and security of a regen capable hub motor installation, but motors with strong regen are tricky. This is especially true with 12mm axles as those do not have much contact flat to pinch against rotation.
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