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Design your own stl gears for 3d printing using our FREE stl gear generator.

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SLGears.com is going under maintenance on August 29-30 2026. Stay tuned!


An image of a herringbone gear; model available for download using the STL Gears Generator.

Double Helical Gear

Herringbone gears offer all the benefits of helical gears, but with the added advantage of eliminating axial thrust.

An image of a spur gear; model available for download using the STL Gears Generator.

Spur Gear

Spur gears are a staple in machinery, due to their simplicity and wide usage.

An image of a helical gear; model available for download using the STL Gears Generator.

Helical Gear

Helical gears are popular for smooth operation and high-torque applications, but produce axial thrust due to angled teeth.


Double Helical Gear



Clock Wise Helix
Helical System
Radial

Radial Method

  • + Holds spur gear geometry/dimensions
  • - Requires special cutting tools, one for each helix angle

Normal Method

  • + Can be manufactured using hobbing or other standard methods
  • - Dimmensions are different from that of spur gears

Show more...
Helix Angle A tooltip image displaying a square with a circle drawn around it.
Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

Show more...
Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

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Number of Teeth
Gear Length
A tooltip image representing the height of the gear.

Profile Shift
A tooltip image representing the profile shifting coefficient in gear milling.

-1 ≤ X ≤ 1

Uncertain? Stick with 0

Show more...

Hole Type



Squared Hole Parameters

Circumradius A tooltip image displaying a square with a circle drawn around it.

Hexagonal Hole Parameters

Circumradius A tooltip image displaying a hexagon with a circle drawn around it.

Circular Hole Parameters

Radius A tooltip image displaying circle.

Keyway Hole Parameters

Bore Diameter A tooltip image displaying a keyway hole's bore diameter.
Key Width A tooltip image displaying a keyway hole's key width.
Bore + Key Height A tooltip image displaying the keyway hole's furthest point from the bore diameter to the key height.


Spur Gear



Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

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Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

Show more...
Number of Teeth
Gear Length
A tooltip image representing the height of the gear.

Profile Shift
A tooltip image representing the profile shifting coefficient in gear milling.

-1 ≤ X ≤ 1

Uncertain? Stick with 0

Show more...

Hole Type



Squared Hole Parameters

Circumradius A tooltip image displaying a square with a circle drawn around it.

Hexagonal Hole Parameters

Circumradius A tooltip image displaying a hexagon with a circle drawn around it.

Circular Hole Parameters

Radius A tooltip image displaying circle.

Keyway Hole Parameters

Bore Diameter A tooltip image displaying a keyway hole's bore diameter.
Key Width A tooltip image displaying a keyway hole's key width.
Bore + Key Height A tooltip image displaying the keyway hole's furthest point from the bore diameter to the key height.


Helical Gear



Clock Wise Helix
Helical System
Radial

Radial Method

  • + Holds spur gear geometry/dimensions
  • - Requires special cutting tools, one for each helix angle

Normal Method

  • + Can be manufactured using hobbing or other standard methods
  • - Dimmensions are different from that of spur gears

Show more...
Helix Angle A tooltip image displaying a square with a circle drawn around it.
Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

Show more...
Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

Show more...
Number of Teeth
Gear Length
A tooltip image representing the height of the gear.
Profile Shift
A tooltip image representing the profile shifting coefficient in gear milling.

-1 ≤ X ≤ 1

Uncertain? Stick with 0

Show more...

Hole Type



Squared Hole Parameters

Circumradius A tooltip image displaying a square with a circle drawn around it.

Hexagonal Hole Parameters

Circumradius A tooltip image displaying a hexagon with a circle drawn around it.

Circular Hole Parameters

Radius A tooltip image displaying circle.

Keyway Hole Parameters

Bore Diameter A tooltip image displaying a keyway hole's bore diameter.
Key Width A tooltip image displaying a keyway hole's key width.
Bore + Key Height A tooltip image displaying the keyway hole's furthest point from the bore diameter to the key height.



An image of a herringbone gear; model available for download using the STL Gears Generator.

Internal Double Helical Gear

Internal double helical arrays excel in heavy torque applications, far surpassing their helical counterpart.

An image of an internal spur gear; model available for download using the STL Gears Generator.

Internal Spur Gear

Internal gears have the ability to create great transmission ratios in confined spaces.

An image of a helical gear; model available for download using the STL Gears Generator.

Internal Helical Gear

Internal helical gears are popular in automatic transmissions, due to their smooth & silent running.


Internal Double Helical Gear



Clock Wise Helix
Helical System
Radial

Radial Method

  • + Holds spur gear geometry/dimensions
  • - Requires special cutting tools, one for each helix angle

Normal Method

  • + Can be manufactured using hobbing or other standard methods
  • - Dimmensions are different from that of spur gears

Show more...
Helix Angle A tooltip image displaying a square with a circle drawn around it.
Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

Show more...
Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

Show more...
Number of Teeth
Gear Length
Outer Diameter
A tooltip image representing the outer diameter of the internal gear.


Internal Spur Gear



Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

Show more...
Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

Show more...
Number of Teeth
Gear Length
Outer Diameter
A tooltip image representing the outer diameter of the internal gear.


Internal Helical Gear



Clock Wise Helix
Helical System
Radial

Radial Method

  • + Holds spur gear geometry/dimensions
  • - Requires special cutting tools, one for each helix angle

Normal Method

  • + Can be manufactured using hobbing or other standard methods
  • - Dimmensions are different from that of spur gears

Show more...
Helix Angle A tooltip image displaying a square with a circle drawn around it.
Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

Show more...
Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

Show more...
Number of Teeth
Gear Length
Outer Diameter
A tooltip image representing the outer diameter of the internal gear.



An image of a rack gear; laser cutting design available for download using the DXF Gears Generator.

Rack

Racks are paired with external gears to transform rotational motion into linear movement.

An image of a pair of bevel gears.

90° Bevel Gears

Bevel gears are used when transmiting motion between intersecting axis is required.


Rack



Module
A tooltip image representing the total rack tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger rack

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Pressure Angle
A tooltip image representing the rack's pressure angle as the inclination of the teeth respective to a vertical line.

Normally 20° or 25°

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Rack Height
A tooltip image depicting the rack's height as the distance between the bottom of the rack and the teeth's lowest point.
Rack Width
A tooltip image depicting the rack's width.

Rack Length


Number of Teeth
A tooltip image representing the total length of the rack.

Rack's length is in function of the complete number of teeth.
Rack Length
A tooltip image representing the total length of the rack.

The number of teeth is in function of the rack's length.


Straight Bevel



Module
A tooltip image representing the total gear tooth height as 2.25 multiplied by the module.

Larger module -> Larger teeth -> Bigger gear

Show more...
Pressure Angle
A tooltip image representing the pressure angle.

Normally 20° or 25°

Show more...
Wheel Number of Teeth
Pinion Number of Teeth

Wheel Hole Type



Squared Hole Parameters

Circumradius A tooltip image displaying a square with a circle drawn around it.

Hexagonal Hole Parameters

Circumradius A tooltip image displaying a hexagon with a circle drawn around it.

Circular Hole Parameters

Radius A tooltip image displaying circle.

Keyway Hole Parameters

Bore Diameter A tooltip image displaying a keyway hole's bore diameter.
Key Width A tooltip image displaying a keyway hole's key width.
Bore + Key Height A tooltip image displaying the keyway hole's furthest point from the bore diameter to the key height.

Pinion Hole Type



Squared Hole Parameters

Circumradius A tooltip image displaying a square with a circle drawn around it.

Hexagonal Hole Parameters

Circumradius A tooltip image displaying a hexagon with a circle drawn around it.

Circular Hole Parameters

Radius A tooltip image displaying circle.

Keyway Hole Parameters

Bore Diameter A tooltip image displaying a keyway hole's bore diameter.
Key Width A tooltip image displaying a keyway hole's key width.
Bore + Key Height A tooltip image displaying the keyway hole's furthest point from the bore diameter to the key height.



Get your gear's parameters by dropping it!

Click or Drop .stl gear file here
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Parameter Value

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