Determine the tangential velocity, Vt.ġ2. Determine the ratio correction factor, Cm.ĩ. Determine the maximum recommended face width, F.Ĩ. Determine a suitable worm gear diameter.Ħ. W t = tangential load on the worm gear (N),Īn outline design procedure for a worm and wheel gear set using the AGMA equations is:ģ. The efficiency, in percent, for worm gearing is given by: N = rotational speed of the worm (rpm), and The sliding velocity at the mean worm diameter can be determined by: Φ n = normal pressure angle of the worm thread at the mean diameter (°) W t = tangential load on the worm gear tooth (N), Μ = friction, (Based on sliding velocity) Values for the ratio correction factor (C m), the velocity factor (C v), and materials factors ( C s) can be found from tables provided in the ANSI/AGMA 6034-B92 standard ot here:ĪGMA Wormgear Equations For Rating Factors The AGMA tangential load on a worm gear is given by:Ĭ s = materials factor, based on manufacturing process V t = sliding velocity at the mean worm diameter (m/s) P output = ( n W t d g ) / ( 1.91 x 10 6 m G ) Where P loss is the power lost due to friction in the mesh (kW). The input-power rating, P input, is given by: Preview Wormgear Calculator, torque, output power, power lost, tangential load Maximum radial deflection of worm gear at pitch point is limited by:
The mean worm gear diameter, d m, is within the following limits: The AGMA rating (ANSI/AGMA 6034-B92) is based on 10 h of continuous operation under a uniform load. The AGMA power rating is based on pitting and wear resistance, as this is the usual failure mode for worm sets. Worm gear sets are generally rated by their capacity to handle a particular level of input power, output power, or allowable torque at a particular speed for the input or output shaft. Mechanics and Machine Design and Engineering Related Resources: calculators AGMA Worm and Spur Gear Design Equations and Calculators AGMA Worm and Spur Gear Design Equations and Calculators
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