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Creating a Bevel Gear with Straight Teeth

NS
Nathan Sokalski
Sun, Oct 26, 2025 9:37 PM

I am using the BOSL2 library to create several gears. I have successfully created a spur_gear, and I want to create a bevel_gear which, when viewed from the top (basically it's shadow), will match the spur_gear. This is my first time using bevel_gear, and I want the teeth to be straight, but they always seem to be curved. Can anybody tell me how to do this? Thanks.

Nathan Sokalski
njsokalski@hotmail.commailto:njsokalski@hotmail.com

I am using the BOSL2 library to create several gears. I have successfully created a spur_gear, and I want to create a bevel_gear which, when viewed from the top (basically it's shadow), will match the spur_gear. This is my first time using bevel_gear, and I want the teeth to be straight, but they always seem to be curved. Can anybody tell me how to do this? Thanks. Nathan Sokalski njsokalski@hotmail.com<mailto:njsokalski@hotmail.com>
RD
Revar Desmera
Sun, Oct 26, 2025 11:43 PM

I believe the solution is adding spiral=0, cutter_radius=0

  • Revar

On Oct 26, 2025, at 2:37 PM, Nathan Sokalski via Discuss discuss@lists.openscad.org wrote:

I am using the BOSL2 library to create several gears. I have successfully created a spur_gear, and I want to create a bevel_gear which, when viewed from the top (basically it's shadow), will match the spur_gear. This is my first time using bevel_gear, and I want the teeth to be straight, but they always seem to be curved. Can anybody tell me how to do this? Thanks.

Nathan Sokalski
njsokalski@hotmail.com mailto:njsokalski@hotmail.com


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I believe the solution is adding `spiral=0, cutter_radius=0` - Revar > On Oct 26, 2025, at 2:37 PM, Nathan Sokalski via Discuss <discuss@lists.openscad.org> wrote: > > I am using the BOSL2 library to create several gears. I have successfully created a spur_gear, and I want to create a bevel_gear which, when viewed from the top (basically it's shadow), will match the spur_gear. This is my first time using bevel_gear, and I want the teeth to be straight, but they always seem to be curved. Can anybody tell me how to do this? Thanks. > > Nathan Sokalski > njsokalski@hotmail.com <mailto:njsokalski@hotmail.com> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org <mailto:discuss-leave@lists.openscad.org>
NS
Nathan Sokalski
Mon, Oct 27, 2025 1:22 AM

That gets straight teeth, but I am also looking to be able to set the bevel gear on top of a spur gear. The teeth of this bevel gear look like the teeth of the spur gear tilted at an angle, but I want it to be something I can attach top to bottom

Nathan Sokalski
njsokalski@hotmail.commailto:njsokalski@hotmail.com


From: Revar Desmera via Discuss discuss@lists.openscad.org
Sent: Sunday, October 26, 2025 7:43 PM
To: OpenSCAD general discussion Mailing-list discuss@lists.openscad.org
Cc: Revar Desmera revarbat@gmail.com
Subject: [OpenSCAD] Re: Creating a Bevel Gear with Straight Teeth

I believe the solution is adding spiral=0, cutter_radius=0

  • Revar

On Oct 26, 2025, at 2:37 PM, Nathan Sokalski via Discuss discuss@lists.openscad.org wrote:

I am using the BOSL2 library to create several gears. I have successfully created a spur_gear, and I want to create a bevel_gear which, when viewed from the top (basically it's shadow), will match the spur_gear. This is my first time using bevel_gear, and I want the teeth to be straight, but they always seem to be curved. Can anybody tell me how to do this? Thanks.

Nathan Sokalski
njsokalski@hotmail.commailto:njsokalski@hotmail.com


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.orgmailto:discuss-leave@lists.openscad.org

That gets straight teeth, but I am also looking to be able to set the bevel gear on top of a spur gear. The teeth of this bevel gear look like the teeth of the spur gear tilted at an angle, but I want it to be something I can attach top to bottom Nathan Sokalski njsokalski@hotmail.com<mailto:njsokalski@hotmail.com> ________________________________ From: Revar Desmera via Discuss <discuss@lists.openscad.org> Sent: Sunday, October 26, 2025 7:43 PM To: OpenSCAD general discussion Mailing-list <discuss@lists.openscad.org> Cc: Revar Desmera <revarbat@gmail.com> Subject: [OpenSCAD] Re: Creating a Bevel Gear with Straight Teeth I believe the solution is adding `spiral=0, cutter_radius=0` - Revar On Oct 26, 2025, at 2:37 PM, Nathan Sokalski via Discuss <discuss@lists.openscad.org> wrote: I am using the BOSL2 library to create several gears. I have successfully created a spur_gear, and I want to create a bevel_gear which, when viewed from the top (basically it's shadow), will match the spur_gear. This is my first time using bevel_gear, and I want the teeth to be straight, but they always seem to be curved. Can anybody tell me how to do this? Thanks. Nathan Sokalski njsokalski@hotmail.com<mailto:njsokalski@hotmail.com> _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org<mailto:discuss-leave@lists.openscad.org>
AM
Adrian Mariano
Mon, Oct 27, 2025 1:34 AM

Are you trying to mate a spur gear with a bevel gear?  Even if the teeth
are straight on a bevel gear you can't mate it with a spur gear because the
teeth on the bevel gear taper.  Bevel gears only mate with bevel gears.  If
for some reason you want straight teeth Revar has given the method  but if
you want to mate a spur gear then the crown_gear module may be what you are
looking for.

On Sun, Oct 26, 2025, 19:43 Revar Desmera via Discuss <
discuss@lists.openscad.org> wrote:

I believe the solution is adding spiral=0, cutter_radius=0

  • Revar

On Oct 26, 2025, at 2:37 PM, Nathan Sokalski via Discuss <
discuss@lists.openscad.org> wrote:

I am using the BOSL2 library to create several gears. I have successfully
created a spur_gear, and I want to create a bevel_gear which, when viewed
from the top (basically it's shadow), will match the spur_gear. This is my
first time using bevel_gear, and I want the teeth to be straight, but they
always seem to be curved. Can anybody tell me how to do this? Thanks.

Nathan Sokalski
njsokalski@hotmail.com


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org


OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

Are you trying to mate a spur gear with a bevel gear? Even if the teeth are straight on a bevel gear you can't mate it with a spur gear because the teeth on the bevel gear taper. Bevel gears only mate with bevel gears. If for some reason you want straight teeth Revar has given the method but if you want to mate a spur gear then the crown_gear module may be what you are looking for. On Sun, Oct 26, 2025, 19:43 Revar Desmera via Discuss < discuss@lists.openscad.org> wrote: > I believe the solution is adding `spiral=0, cutter_radius=0` > > - Revar > > > > On Oct 26, 2025, at 2:37 PM, Nathan Sokalski via Discuss < > discuss@lists.openscad.org> wrote: > > I am using the BOSL2 library to create several gears. I have successfully > created a spur_gear, and I want to create a bevel_gear which, when viewed > from the top (basically it's shadow), will match the spur_gear. This is my > first time using bevel_gear, and I want the teeth to be straight, but they > always seem to be curved. Can anybody tell me how to do this? Thanks. > > Nathan Sokalski > njsokalski@hotmail.com > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org