Understanding the Importance and Usage of Torque Arms in Gearboxes

Introduction to Torque Arms

WLY offers torque arms designed for right-position gearboxes to create a pivotal connection between your gearbox and a fixed, stable anchor point. The main function of a torque arm is to resist the torque generated by the gearbox. Essentially, it inhibits the counter-rotation of a shaft-mounted speed reducer (SMSR) during the operation of the application.

Benefits of Using the Arc Universal Torque Arm

Unlike other torque arms that pose challenges at certain angles, the Arc universal torque arm, offered by WLY, allows for consistent positioning of the axle lever at 90 degrees. This ensures you get the maximum mechanical advantage. The unique spline design lets you rotate the torque arm lever to almost any position, which proves especially useful if you're dealing with a more complex fork situation. This device is perfect for both front and back hub motors.

Invest in the Arc arm to safeguard your dropouts! It's crafted from precision laser-cut 6mm stainless 316, renowned for its exceptional mechanical hardness. The package includes washers to secure the spline section, hose clamps, and fasteners.

Why Torque Arms are Integral for Bicycles

A torque arm is a crucial piece of support metal added to a bicycle frame to more securely hold the axle of a powerful hubmotor. Many individuals prefer to transform a regular pedal bicycle into an electric one to save costs. Manufacturers have developed straightforward conversion kits that can easily adapt a standard bicycle to an electric model. However, the torque generated by the inclusion of massive electrical hub motors can pose a challenge, and this is where torque arms prove their worth.

Role of Torque Arms in Electric Bicycles

Torque arms are designed to assist the bicycle's dropouts (the part of the bike that grips the axles of the wheels) in resisting the torque of an electric hubmotor. Regular bicycle wheels don't exert much torque on the bike dropouts. Front wheels barely apply any torque, hence the front fork of a bike is designed merely to hold the wheel in place, not to resist its torque. Rear wheels on standard bicycles traditionally do apply a small amount of torque on the dropouts, but not more than the axle bolts clamped against the dropouts can handle.

However, the inclusion of an electric hub motor can make torque a significant issue. Small motors of 250 watts or less are generally manageable. But once you start dealing with about 500 watts, problems may arise, especially with front forks and even more so when the material is weaker, like in the case of aluminum forks.

Why Choose WLY Products

When it comes to the production of torque arms, WLY stands out for its commitment to quality, affordability, and exceptional customer service. Our products, including the Arc universal torque arm, are designed with precision and durability in mind, ensuring they provide an optimal solution for your applications. We encourage customers to explore our product range and contact us for any purchase inquiries.


Frequently Asked Questions

1. What is the primary function of a torque arm?

A torque arm serves to resist the torque produced by the gearbox, preventing the counter-rotation of a shaft-mounted speed reducer during operation.

2. How does the Arc universal torque arm differ from others?

The Arc universal torque arm allows for consistent axle lever positioning at 90 degrees and can be rotated to almost any position thanks to its unique spline design.

3. Why are torque arms important in electric bicycles?

Torque arms assist the bicycle's dropouts in resisting the torque of an electric hubmotor, which becomes a significant issue when dealing with motors of about 500 watts or more.


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