Author Topic: Plastic reduction gear set  (Read 1845 times)

Online Jo

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Re: Plastic reduction gear set
« Reply #45 on: June 19, 2020, 01:56:23 PM »
I've just tried printing a set and it looks like they will work... once I reset up the printer  :Doh: and fit the print head cooling fan that I purchased for it months ago  ::)

Jo
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Offline Dave Otto

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Re: Plastic reduction gear set
« Reply #46 on: June 19, 2020, 07:39:44 PM »
I've just tried printing a set and it looks like they will work... once I reset up the printer  :Doh: and fit the print head cooling fan that I purchased for it months ago  ::)

Jo

Do you have CAD? it would be fun run a few on our HP Multi Jet Fusion printer here at work.

Dave

Offline Vixen

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Re: Plastic reduction gear set
« Reply #47 on: June 19, 2020, 08:11:42 PM »
I've just tried printing a set and it looks like they will work... once I reset up the printer  :Doh: and fit the print head cooling fan that I purchased for it months ago  ::)

Jo

Do you have CAD? it would be fun run a few on our HP Multi Jet Fusion printer here at work.

Dave

I don't know what plastic materials Dave can offer with his(?) HP Multi Jet Fusion printer. Maybe Dave has some high strength material available. If not, provided the gear is the correct shape but not strong enough, you could get some printed by www. sculpteo. com or a similar print house, in one of their more exotic reinforced plastic materials

It may be another option

Mike
It is the journey that matters, not the destination

Offline Dave Otto

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Re: Plastic reduction gear set
« Reply #48 on: June 19, 2020, 08:42:21 PM »
These would be solid Nylon PA12

Dave

Offline Vixen

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Re: Plastic reduction gear set
« Reply #49 on: June 19, 2020, 08:52:53 PM »
Dave

Sounds like a good strong material to try.

Mike
It is the journey that matters, not the destination

Online Jo

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Re: Plastic reduction gear set
« Reply #50 on: June 20, 2020, 06:21:56 AM »
Do you have CAD? it would be fun run a few on our HP Multi Jet Fusion printer here at work.

These are the two stl files for the gears.

Jo
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Offline Jasonb

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Re: Plastic reduction gear set
« Reply #51 on: June 20, 2020, 07:04:35 AM »
Can't see why the first gear could not be made from two pieces soldered together as it has straight cut gears.

Second one does not show any undercut of the pinion so again could have been cut and soldered to the skew gear.

Online Jo

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Re: Plastic reduction gear set
« Reply #52 on: June 20, 2020, 07:12:14 AM »
Everything that has been made can be made again... it is all a case of how much time and effort you want to put into it  ::)

The ex-factory price for each gear is 10p each, the problem is minimum order 1000 plus 30 shipping  :toilet_claw: Last year I purchased two full assemblies, including the electric motors, for 6 each.

Jo
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Offline Dave Otto

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Re: Plastic reduction gear set
« Reply #53 on: June 25, 2020, 12:39:49 AM »
Here is a picture of the printed gears, not sure if they would work or not; they are pretty tiny.
The porous looking surface is only skin deep, under the gray is solid Nylon. This is caused by the transition between the part and powder bed that it is built in.
One thing is for sure I doubt that you would ever have much luck printing them on an FDM machine.

Dave
« Last Edit: June 25, 2020, 12:43:50 AM by Dave Otto »

Online Jo

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Re: Plastic reduction gear set
« Reply #54 on: June 25, 2020, 05:37:35 AM »
They look rather good  :) Much better than I managed on my printer.

Jo
Enjoyment is more important than achievement.