Bevel Gears
Addendum is the length of the tooth from the pitch diameter to the major diameter.
Addendum Modification is the amount of addendum change of a modified tooth. This value can be positive or negative. If the sum of change to a pair of gears equals zero then there is no change to the center distance.
AGMA Class sets the AGMA Class for this component.
The Back Angle is perpendicular to the pitch cone at the pitch diameter measured perpendicular to the shaft.
The Face Angle of a blank is made parallel to the root cone of the mating gear.
Front Angle is parallel to the back angle at the inside surface of the face width. Miter gears do not have this geometry.
The Pitch Angle is from the apex point to a point on the pitch diameter measured from the shaft.
The Root Angle is from the apex point to the bottom of the dedendum.
Sum of Pitch Angles defines the sum of the pitch angles for this component and its parent component.
Backlash is the thinning (or thickening, if a negative value) of the tooth profile after any modification to the tooth form.
Circular Pitch is the arc length of a single pitch at the pitch diameter.
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 0.080in.
The whole depth is equal to the sum of twice the addendum coefficient and the clearance coefficient divided by the diametral pitch.
Coefficient, Addendum Modification
Addendum Modification Coefficient is the ratio of change of a modified tooth. This value can be positive or negative. If the sum of change to a pair of gears equals zero then there is no change to the center distance.
Clearance Coefficient is a constant that is divided by the diametral pitch to determine the clearance in the root of the gear tooth.
The whole depth is equal to the sum of the clearance coefficient and twice the addendum coefficient divided by the diametral pitch.
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.
Crown to Back defines the distance from the crown to the back of the gear including any hub projection.
Crown to Apex defines the distance from the crown to the gear apex. This is a read-only value.
Dedendum is the radial length of the tooth between the pitch diameter and the minor diameter.
Base Diameter is a diameter that is tangent to the pressure angle. The involute curve cannot be within this diameter.
Outside Diameter displays the outside diameter of the bevel gear. This value cannot be changed directly and is a result of the pitch diameter, addendum and back angle.
Pitch Diameter is a theoretical diameter of the gear.
Diametral Pitch is used in imperial system gears
Face to Back is a read only value that defines the overall length of the gear along the axis.
Face Width defines the length of the tooth along the pitch cone.
Fillet Radius defines the radius on the tip of the cutter, which forms a trochoidal curve tangent to the tooth root.
Circular Thickness Factors K for Gleason system spiral bevel gears. This value can be found in Machinery’s Handbook in the 24th and earlier editions. The user must specify this value for spiral bevel gears. It is automatically generated for Gleason straight bevel gear sets.
Manufacturing Method defines how the gear is to be manufactured. Select Gleason or Non-standard. Selecting Non-standard allows the user more control of the parameters of the geometry.
Module (transverse) is used in metric system gears. Module equals the normal module divided by the cosine of the helical angle.
Mounting Distance defines the distance from the apex to the end of the bevel gear. This dimension will include the hub projection.
Name defines the name of the part.
Number of Teeth defines the number of teeth for the component.
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.
Currently not used
Currently not used
Pressure Angle is the angle of the tooth at the pitch diameter normal to the cutter.
Spiral Angle defines the angle of the spiral. Specify 0 degrees for a straight bevel gear. Normally 35 degrees is specified for spiral bevel gears.
Spiral Direction defines the direction of the spiral for spiral bevel gears. Select right hand or left hand.
Tooth Thickness is the arc thickness of the tooth at the pitch diameter.
Units sets the measurement units for the component; select Inches or Metric.
Web Thickness defines the thickness between the face of the bevel gear and the back face, not including the hub projection. For a miter type gear, set this value to 0.0.
Whole Depth is the depth of the tooth (from the major diameter to the minor diameter).
The whole depth is equal to the sum of the clearance coefficient and twice the addendum coefficient divided by the diametral pitch.
Working Depth is the length of the tooth that engages the mating gear at the pitch line.