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Table 1

Calculated parameters of the designed worm gear drive.

Parameters of the worm gear drive Values
Diametral pitch pd=5.08 mm
Normal diametral pitch pdn=5.099 mm
Axial module max=5 mm
Normal module mn=4.98 mm
Worm lead of thread px=15.7 mm
Circular pitch of the worm-wheel t0=15.7 mm
Lead angle γm=5°
Addendum coefficient f'=1
Fillet coefficient r'=0.3
Number of threads z1=1
Number of teeth of the worm-wheel z2=30
Direction of the wheel right hand
Pitch diameter of the worm d01=57.2 mm
Pitch diameter of the worm-wheel d02=150 mm
Outside diameter of the worm da1=67.2 mm
Outside diameter of the worm-wheel da2=161.7 mm
Center distance a=103.6 mm
Face width of the worm-wheel b2=25.4 mm
Worm length L=70 mm
Pressure angle αax=20.1°
Normal pressure angle αn=20°
Addendum of the worm ha1=5 mm
Addendum of the worm-wheel ha2=5 mm
Dedendum of the worm hf1=5.8 mm
Dedendum of the worm-wheel hf2=5.8 mm
Tooth thickness Sax=7.9 mm
Fillet radius r=1.5 mm
Transmission ratio i=1/30
Diameter ratio q=12

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