lathe gear

[li150ss]

Is it possible for any body able to print / cut a 63 tooth gear for me , and possibly leading to a full set (13 gears i think). Its for a clarke cl430 lathe

 

[Agroshield]

The dimensions you give are for a standard 1 MOD gear. It would be worth exploring commercial sources as an alternative option to 3DP, especially for the more common sizes (multiples of 5 teeth)

The 12mm centre bore of this one could be machined to suit your requirements:

Mini-Lathe 63 Tooth Metal Gearwheel - Arc Euro Trade

Use a 63 tooth gear to cut both Metric and Imperial threads on a Mini-Lathe. Suitable for SIEG C2, C3, SC2, SC3 and other mini-lathes.

www.arceurotrade.co.uk

Look at the other gears Arc sells in other tooth counts. It might make more economic sense to change the centre detail over from what you have to what those gears use.

See also:

Mod 1 Pinion Gears 49t 50t 55t 60t 63t 70t 75t 80t 90t 100t Metal Spur Gear Transmission Accessories - Gear - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

 

[dieselsamurai]

Ive been using printed gears on my lathe for a while now with no issue , I wouldn't recommend for daily use but hobby use its been fine

 

[li150ss]

The dimensions you give are for a standard 1 MOD gear. It would be worth exploring commercial sources as an alternative option to 3DP, especially for the more common sizes (multiples of 5 teeth)

The 12mm centre bore of this one could be machined to suit your requirements:

Mini-Lathe 63 Tooth Metal Gearwheel - Arc Euro Trade

Use a 63 tooth gear to cut both Metric and Imperial threads on a Mini-Lathe. Suitable for SIEG C2, C3, SC2, SC3 and other mini-lathes.

www.arceurotrade.co.uk

Look at the other gears Arc sells in other tooth counts. It might make more economic sense to change the centre detail over from what you have to what those gears use.

See also:

Mod 1 Pinion Gears 49t 50t 55t 60t 63t 70t 75t 80t 90t 100t Metal Spur Gear Transmission Accessories - Gear - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Thanks , i have looked at them thinking along the lines of what you said . The arc euro ones dont seem to have (apart from a couple) what i want if go for a full set. The other ones are all 10mm thick as opposed to 8mm. Just thought about printed set as they will rarely get used , basically i would just like to have a complete set and have a faff about learning a bit of screwcutting. I only got the lathe (cos it was cheap enough) so i could skim a lambretta brake drum and now want to have a play around

 

[Jelly_Sheffield]

Is it possible for any body able to print / cut a 63 tooth gear for me , and possibly leading to a full set (13 gears i think). Its for a clarke cl430 lathe

I would need to check what cutter sets I have in the workshop (I am pretty sure there's a full set of MOD1), but in principle could make whatever sizes you wanted* out of either EN8 or Delrin.

However, just the material costs and postage would make them equivalent in cost to buying from ArcEuroTrade.

If there's any sizes you can't find commercially drop me a PM.

*(There's a practical limit of about 300 teeth, or an absolute hard limit of around 1600 teeth, but your needs would never hit either)

 

[Agroshield]

If you go the 3DP route, model just the centre detail with maybe 10mm material around it and do a test print. Check the fit on your machine and tune it to fit.

It is no good producing a load of gears and then finding they are either too loose or too tight on the centre.

If you can skim a brake drum, you can skim a 10mm thick gear down to 8mm thick.

 

[li150ss]

If you go the 3DP route, model just the centre detail with maybe 10mm material around it and do a test print. Check the fit on your machine and tune it to fit.

It is no good producing a load of gears and then finding they are either too loose or too tight on the centre.

If you can skim a brake drum, you can skim a 10mm thick gear down to 8mm thick.

I have actually ordered one of the chinese 10mm ones with skimming it down in mind , but dont know how i'll get on sorting centre shape out.

 

[li150ss]

I would need to check what cutter sets I have in the workshop (I am pretty sure there's a full set of MOD1), but in principle could make whatever sizes you wanted* out of either EN8 or Delrin.

However, just the material costs and postage would make them equivalent in cost to buying from ArcEuroTrade.

If there's any sizes you can't find commercially drop me a PM.

*(There's a practical limit of about 300 teeth, or an absolute hard limit of around 1600 teeth, but your needs would never hit either)

PM sent

 

[Agroshield]

Gear and centre detail STL files below. You have to remove the .txt extension.

They can be viewed here: https://3dviewer.net/index.html

 

[li150ss]

Update with a query. Used this as a bit of excuse to buy a 3d printer . Got Ender3 delivered Monday with some EN-PLA+ . Watched a few videos on Freecad (hairpuller) , and managed a couple of prints. Large gear took some filing and manipulation to fit centre , so adjusted measurements in Freecad for smaller gear and it is a tight push fit , so quite happy with that . So before i make anymore what filament would you recommend ? or just use what i have ?

 

[Agroshield]

...adjusted measurements in Freecad...

Do you want the original model for the STLs above? That was made in FreeCAD.

A very good feature of the FreeCAD gears part is the ability to put a fillet radius in the root of every tooth. With a 3DP item, that can be a big benefit for strength.

As you have the machine on which to try prints, it is worth experimenting to see what fillet radius you can put on the internal corners of the centre detail of the gear (external corners of the shaft). If the gear is going to crack, that is where it will happen as sharp corners there are a big stress riser, especially on the small one you show.

 

[RWD3M]

I'm not sure if it's applicable here but I have heard of printing change gears to push onto existing gears.

Like this:

127T change gear to fit to 100T change gear by nglasson

This is a further refinement of my prior 127T design to enable machining of metric threads on Harrison L5 lathes. See my other designs for other lathe gear variations. http://www.thingiverse.com/nglasson/designsThe gear that this is re-mixed from takes a long time to print and it occured to me...

www.thingiverse.com

 

[li150ss]

Do you want the original model for the STLs above? That was made in FreeCAD.

A very good feature of the FreeCAD gears part is the ability to put a fillet radius in the root of every tooth. With a 3DP item, that can be a big benefit for strength.

As you have the machine on which to try prints, it is worth experimenting to see what fillet radius you can put on the internal corners of the centre detail of the gear (external corners of the shaft). If the gear is going to crack, that is where it will happen as sharp corners there are a big stress riser, especially on the small one you show.

Yes please for the STLs , i'm not overly good when it comes to stuff like this , i still havn't managed to open the other files you sent. Didn't know that about 'stress cracking' i will try to put a radius on next one.
Any thought's on filament type ?

 

[Agroshield]

Yes please for the STLs

The STLs are in the above post. No sense in uploading them again. The forum only accepts certain file types (which it determines using the extension given to the file). You have to download the ones above and delete the .txt extension of the downloaded file name to obtain the .stl

STL files are difficult to modify but easy to distribute. That is why the majority of thingiverse stuff is stl as you just download and send to your printer. But having the original 3D CAD file is better if you need to tweak the model.

In a similar way, this one has a .zip file extension. You have to edit that (change it into) .fcstd to recover a file that FreeCAD will open.

Stress cracking is why ships have round hatch opeings. They used to use square ones, but the corners cracked mid-Atlantic and the ships sank. See:

 

[li150ss]

The STLs are in the above post. No sense in uploading them again. The forum only accepts certain file types (which it determines using the extension given to the file). You have to download the ones above and delete the .txt extension of the downloaded file name to obtain the .stl

STL files are difficult to modify but easy to distribute. That is why the majority of thingiverse stuff is stl as you just download and send to your printer. But having the original 3D CAD file is better if you need to tweak the model.

In a similar way, this one has a .zip file extension. You have to edit that (change it into) .fcstd to recover a file that FreeCAD will open.

Stress cracking is why ships have round hatch opeings. They used to use square ones, but the corners cracked mid-Atlantic and the ships sank. See:

This is where i struggle , i download the zip file but cant seem to find how to edit it. i can find it in my downloads , but can only then find 'rename', add the .fcstd but that doesnt work.

 

[Agroshield]

I download the zip file but cant seem to find how to edit it.

If it is Windows, possibly, you need to find the option in File Manager that shows (or un-hides) filename extensions.

 

[iNf]

This is where i struggle , i download the zip file but cant seem to find how to edit it. i can find it in my downloads , but can only then find 'rename', add the .fcstd but that doesnt work.

Have you unzipped (uncompressed) it?

 

[Agroshield]

Have you unzipped (uncompressed) it?

A FreeCAD file is natively a zip file, so zipping it to upload does nothing to reduce its size. Hence, unzipping it is not required.

Let us say the file was called test.fcstd All I did was rename to test.zip so the forum would accept it as an upload. So if a person downloads it, they should see test.zip on their own local machine, which then has to be renamed test.fcstd to make it open in FreeCAD.

Maybe someone with online storage could upload it and the STLs and send a link to the files to li150ss.

 

[li150ss]

I did a bit of google and then did a extract files. Ive got 5 model pictures of the gear on freecad . As mentioned above , yes on Windows