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This technical manual contains all important technical information and methods for the design and calculation of drives with Optibelt V-belts and V-grooved pulleys for industrial applications. Our Application Technology experts offer you free support service regarding the application of our products and also help solve your drive problems.
The formula of Angle of Contact for Open Belt Drive is expressed as Angle of Contact = 180*pi/180-2*Angle Made By Belt With Vertical Axis. Check Angle of Contact for Open Belt Drive example and step by step solution on how to calculate Angle of Contact for Open Belt Drive.
Higher shaft torsional loads are handled by using multiple belt pulleys. A jockey pulley can be installed to increase the angle of contact and allow transfer of more power. It can be mounted on either the tight or loose belt side and adjusted inwards to provide more angle of contact.
Lecture presentation on belt drives, contact angle geometry, and drive kinematics.
The angle subtended by the belt on the pulley is know as angle of contact or arc of contact. For better performance the angle of contact should be between 90° to 170°.
Angle of wrap on smaller sheave should be greater than 120 deg. The centre distance is 2.424 m. The driving pulley is 152.4 mm in diameter and rotates at 2000 rpm such that the loose side of the belt is on top. The driven pulley is 457.2 mm in diameter. The belt material specific density is 996.5 kg/m3. If friction coef. is f=0.3 find F1 and F2.
Belt pitch, p, is defined as the distance between the centerlines of two adjacent teeth and is measured at the belt pitch line (Fig. 1). The belt pitch line is identical to the neutral bending axis of the belt and coincides with the center line of the cords.
To calculate Angle of Contact for Open Belt Drive, you need Angle Made By Belt With Vertical Axis (α). With our tool, you need to enter the respective value for Angle Made By Belt With Vertical Axis and hit the calculate button.
θ = angle of contact (rad), usually taken as the angle for the smaller pulley. The centrifugal forces acting on the belt along the arcs of contact reduce the surface pressure.
To prevent the belt from riding off the pulley, and to resist the lateral forces caused by the belt’s side-to-side motion, synchronous belt drive systems typically require one or more flanged pulleys.
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