RO-DRIVE™

RO-DRIVE™ is our range of positive-drive automotive belts. These timing belts combine exceptionally high tensile strength with reliable, sustained trasnmission of extremely high torque levels. Available in three different basic profiles (trapezoidal, HTD, STD), they allow for synchronous power transmission. They ensure dependable, quiet operation and are maintenance-free. These belts are suitable for driving cramshafts, injection pumps and balancer shafts in car engines.

Timing Belts and Timing Belt Kits

With timing belts from Roulunds Rubber, you are opting for a first-rate product in original equipment quality. To ensure this quality standard for our kits as well, we use strictly guide, tensioner and idler pulleys from leading original equipment suppliers. These drive component parts guaranty the correct tensioning, guidance and power transmission of timing belts.

a) Backside of belt
b) Tension members
c) Fabric
d) Teeth

Design and Functions

Timing Belts
A timing belt is made of synthetic rubber. Reinforcing fiberglass cords run the length of the belt as its tension member. The belt back is also partially reinforced by polyamide fabric. A temperature-resistant intermediate layer allows the materials to work well together. The teeth are also reinforced with polyamide to protect them from wear. Since the timing belt requires no lubrication, its operating area does not have to be sealed from the outside. Here, a simple plastic cover is sufficient protection against contamination with dirt and foreign matter.

The timing belt controls the precision of the combustion process in the engine: It drives the camshaft, which in turn controls the valves. Its function is particularly important, because if the belt tears or even just jumps a couple of teeth then the valves and pistons in the engine could collide with enormous force. The result is a damaged engine. Often, the timing belt also performs additional tasks such as driving the injection pump, the water pump or the balancer shaft.

Pulleys
Tension and idler pulleys consist of a steel or plastic hub into which a single or double row of ball bearings has been pressed. They may have a smooth or a profiled belt side surface. After the pulley has been fastened, a protective plastic cap is snapped on. Specially formed steel caps can also be used to protect the idler pulley bearing. They are screwed to the idler pulley.

Tension pulleys transfer the force from the belt tensioner to the belt and keep the belt tension constant. Idler pulleys are used to change the path of the belt in order to drive the accessories, or are used as dampers to control belt vibration in a long belt span.

Properties of Timing Belts

• Designed for the camshaft drive in cars
• Oil-resistant
• temperature-stable
• tropacalized

Properties of Timing Belts Kits

• Complete kits with optimally matched drive components for cars
• Tensioner and idler pulleys included
• Need to order belts and parts separately is eliminated
• Exact match-up automatically provided
• Reduced administrative expense for ordering, stocking and billing