How to make compatible teeth

[SimonPlatten]

I have just received one of these:

https://www.amazon.co.uk/gp/product/B07XHRQ8H1/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

I want to model compatible teeth to fit with this, can I draw a too then use a tool to create multiples of the teeth around a curve ?

[whittakerdw]

You can use the circular pattern. The circular pattern allows you to select bodies/components and select an axis in which you want to rotate them about. You can then select how many bodies you would like around said axis as well as the number of degrees between each body/component. Circular pattern can be found in the create drop down>pattern>circular pattern. Hope this helps.

[g-andresen · Accepted solution]

Hi,

download a suitable model from (e.g. MCMASTER)

günther

[SimonPlatten]

Sorry for being a bit dump, from the product details the belt is 6mm wide, I'm not sure what to select and how or if I can download something without a purchase?

[jhackney1972]

@g-andresen has directed you to the McMaster-Carr catalog accessible from within Fusion 360.  All the components in these catalogs are free to download and use in your design.  The companies supplying these links are hoping you will purchase the items you use from them but it is not necessary.  I believe I have downloaded the pulley your desire.  It is attached to this post.

[g-andresen]

Hi,

1. You should already know the data of the belt to make the right choice.
2. The download is free of charge.
But you have to register before.

günther

[SimonPlatten]

Thank you, what is the key / important information from:

https://www.amazon.co.uk/gp/product/B07XHRQ8H1/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

[g-andresen]

Hi,

Not knowing your application, I suspect it is a GT 2 Pulley.
You may also need to know the shaft diameter.

What about the model of @jhackney1972 

günther

[SimonPlatten]

My design is non standard, I want to use the belt on a custom made wheel which is almost 1 metre in diameter.  Im dividing the wheel into sections to print, where each section will have teeth to mate with the belt.  The aim is to model the teeth onto the arc of each section then print out multiple sections to rejoin into the complete wheel.

[TheCADWhisperer]

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@SimonPlatten wrote:

My design is non standard...

---

What problem are you having?

Can you File>Export your *.f3d file of your attempt to your local drive and then Attach it here to a Reply?

Do you know how to fully define a sketch (the most basic of all Fusion foundational techniques)?

To fit the belt the teeth must be uniform no matter how many teeth there are.

Simply use the downloaded pulley by @jhackney1972 to get the teeth dimensions and then sketch on circle.

Given the number of teeth and the teeth dimensions you can calculate the circle diameter.

If you have mastered fully defined sketches (the most basic of Fusion foundational techniques) this should only take a few minutes.

[SimonPlatten]

Thank you, I will take a look.

[SimonPlatten]

@jhackney1972 , @g-andresen , I've downloaded a couple of models from https://www.mcmaster.com

These are:

92949A050_18-8 Stainless Steel Button Head Hex Drive Screw.SLDPRT

91841A115_18-8 Stainless Steel Hex Nut.SLDPRT

I've uploaded these into Fusion 360, but I cannot open either of them, it launches the online viewer, what I can to do is copy the thread from the bolt and the threaded part from the nut, rescale and use in my own design, how can I open these in Fusion 360 for editing?

[TheCADWhisperer]

Are you using paid commercial license or are you using free personal license of Fusion 360?

[SimonPlatten]

At the moment its the free version, once I have created my model and if it is successful I fully intend to register and get the paid version.

I just cannot afford or justify the cost of the license presently.

[TheCADWhisperer]

Free license does not support translation of •.sldprt files. 

[SimonPlatten]

I was afraid of that, is there any way to achieve this using any other tools?  None of the many YouTube videos highlight this.

NVM, Found this:

https://anyconv.com/sldprt-to-stl-converter/

[jhackney1972]

Go back to McMaster-Carr and download what you need in a different format.  They offer a whole array of CAD neutral formats such as STEP and SAT.

[SimonPlatten]

I have a Creality CR-10 MAX 3D Printer, I downloaded two models:

92949A050_18-8 Stainless Steel Button Head Hex Drive Screw.SLDPRT

91841A115_18-8 Stainless Steel Hex Nut.SLDPRT

I used: https://anyconv.com/sldprt-to-stl-converter/

To convert these to OBJ files and load into Fusion 360, I then printed both models and found that although close the bolt can't be screwed into the nut.

Today I downloaded: 

Metal Gear Rack - 20 Degree Pressure Angle, Rectangular, 20 Pitch, 2 ft. Length

Converted to OBJ and loaded into Fusion 360, printed and found again although close the belt I purchased:

https://www.amazon.co.uk/gp/product/B07XHRQ8H1/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

Doesn't quite fit onto the printed model...am I missing something, is this due to the printer or do I need to experiment with rescaling?

All downloads from: https://www.mcmaster.com/

[g-andresen]

Hi,

The dimensional and shape accuracy of 3D printed parts depends largely on material properties and printer settings. Either you know these parameters or you have to determine them by suitable test prints (see relevant forums).
The parts must then be adjusted accordingly in Fusion.

günther