Worm Gears
Addendum, Gear
Addendum, Gear is the length of the gear tooth from the pitch diameter to the major diameter.
Addendum Modification is the amount of addendum change of a worm tooth. A positive value increases the addendum of the worm and decreases the addendum of the gear (wheel).
Addendum Modification Coefficient
Addendum Modification Coefficient is the ratio of change of a worm tooth. A positive value increases the addendum of the worm and decreases the addendum of the gear (wheel).
Addendum, Worm is the length of the worm tooth from the pitch diameter to the major diameter.
Backlash, Gear is the thinning (or thickening, if a negative value) of the gear tooth profile after any modification to the tooth form.
Backlash, Worm is the thinning (or thickening, if a negative value) of the worm tooth profile after any modification to the tooth form.
Bore defines the diameter of the bore for the gear (wheel) component.
Bore, Chamfer defines the chamfer size for the bore of the gear (wheel) component.
Bore, Worm defines the diameter of the bore for the worm component.
Bore, Worm Chamfer defines the chamfer size for the bore of the worm component.
Center Distance defines the distance between the centers of the worm and the wheel gear. This is a read only value and cannot be directly changed.
Addendum Coefficient is a constant that is divided by the diametral pitch to determine the length of the addendum before any modification. The addendum length of a 10 diametral-pitch gear with an addendum coefficient of 0.8 is 0.080 in.
Clearance Coefficient is a constant that is divided by the diametral pitch to determine the clearance in the root of the gear tooth.
Fillet Coefficient is a constant that is divided by the diametral pitch to determine the radius of the hob tip that creates the gear tooth root.
Contact Ratio defines the contact ratio for the worm gear set.
Dedendum, Gear
Dedendum, Gear is the radial length of the gear tooth between the pitch diameter and the minor diameter.
Dedendum, Worm is the radial length of the worm tooth between the pitch diameter and the minor diameter.
Gear Pitch Diameter is a theoretical diameter of the gear.
Worm Pitch Diameter is a theoretical diameter of the worm.
Diametral Pitch (transverse) is used for imperial system gears.
Normal Diametral Pitch is used for imperial system gears. Normal diametral pitch = diametral pitch / cosine(lead angle).
Direction, Gear determines whether the teeth on the gear are right hand or left hand.
Face Width (rim width) defines the width of the gear wheel parallel to the shaft without any hub projections.
Fillet Radius defines the radius on the tip of the cutter, which forms a trochoidal curve tangent to the tooth root.
Gear, Outside Diameter is the maximum diameter of the gear wheel.
Gear Standard sets the AGMA or DIN standard for the component.
Lead, Gear defines the length of one pitch of the gear wheel. The lead of the gear equals the lead of the worm divided by the number of worm threads (starts).
Lead, Worm defines the length of one pitch of the worm. The lead of the worm equals the lead of the gear wheel multiplied by the number of worm threads (starts).
Lead, Worm, Angle Defines the angle of the worm lead.
Length, Worm defines the axial length of the worm.
Module (transverse) is used in metric system gears.
Module, Normal is used in metric system gears. Module equals the normal module multiplied by the cosine of the worm angle.
Name, Component
Name, Component defines the name of the worm set.
Number of Teeth defines the number of teeth for the gear (wheel).
Number of Threads defines the number of threads of the worm. This is also referred to as “starts”.
Part Color sets the color of the component. If the component is the active component then the color used for display is determined by the Color_Active_Component option in the Options menu. To get an active component to be displayed in its specified color, set the Color_Active_Component option to Transparent.
Path defines the name of the folder where the component files are stored on the computer or network.
Pressure Angle is the angle of the tooth at the pitch diameter in the transverse plane.
Pressure Angle Normal is the angle of the tooth at the pitch diameter normal to the cutter.
Teeth to Pattern defines the number of teeth to pattern when creating the model in CAD. The options are All, None, or First 10. If this is set to All, GearTeq will create a pattern that contains all the teeth. This might be very time consuming if there are a large number of teeth and/or the component is a helical gear. If this is set to none, then a pattern will not be created. Set this to ‘First 10’ to create a pattern with 10 teeth that can easily be expanded in the CAD system.
If the advanced worm gear tooth shape is used, the tooth cut will not be patterned in CAD. Creating a pattern of an advanced worm tooth on a wheel with many teeth could take more than a few minutes.
Units sets the measurement units for the component; select Inches or Metric.
Whole Depth is the depth of the tooth (from the major diameter to the minor diameter).
Worm Outside Diameter defines the maximum diameter of the worm.