Worm drive.

First off, I haven't used one.

However, 26:1 seems a bit high geared (low ratio) for our scale. Batteries like motors to spin, not to deliver bottom end grunt.

Equally, I have not had success with single worm drives in this scale - they will work with light loads.

I messed about with a number of single worm drives, that all failed, before stumping up for an MSC motor gearbox - pricey though, and the prices have also gone up lately, so we're talking just shy of £100 unless you belong to G1MRA, then it's a good bit cheaper.
 
I have used some of the other IP gear box drives on smaller machines with success, added to a Delring Gear for 4 wheel drive in all cases. But for a more grunty performance I must agree with Rhinochugger Rhinochugger to the quality of MSC gear box drives.
 
Slightly off tangent, there are reports that the supply of Delrin chain has dried up.

I am trying to find out more on this.

PhilP.
 
I have a pdf models Ruston diesel that had a very similar-looking gearbox. After a lot of use, it gave up the ghost (I can't recall why, but maybe stripped gears?). I replaced the gears, but see that pdf are now selling a slightly different version: 30.1 motor gearbox kit | Pdf Models
It's quite a bit cheaper, so might be worth a punt?
 
Northsider said:
I have a pdf models Ruston diesel that had a very similar-looking gearbox. After a lot of use, it gave up the ghost (I can't recall why, but maybe stripped gears?). I replaced the gears, but see that pdf are now selling a slightly different version: 30.1 motor gearbox kit | Pdf Models
It's quite a bit cheaper, so might be worth a punt?
Click to expand...
I've used someone else's 3D printed gearbox - and it fell apart but, it may not have liked the brand of oil that I was using - part of the Ez-e-lube set which is meant to be oil for railway models.
 
Rhinochugger said:
I've used someone else's 3D printed gearbox - and it fell apart but, it may not have liked the brand of oil that I was using - part of the Ez-e-lube set which is meant to be oil for railway models.
Click to expand...
Ez-e-lube is all 'plastic friendly', but it does not say to which plastics, and nothing about corn-starch 3D printed 'plastic'..

Though probably your gearbox failed, because of the orientation it was printed. - Inherently weak, along the plane it is printed.
There are many variables, to creating a 'fit for purpose' print.

PhilP.
 
PhilP said:
Ez-e-lube is all 'plastic friendly', but it does not say to which plastics, and nothing about corn-starch 3D printed 'plastic'..

Though probably your gearbox failed, because of the orientation it was printed. - Inherently weak, along the plane it is printed.
There are many variables, to creating a 'fit for purpose' print.

PhilP.
Click to expand...
I can't remember the manufacturer - but I had expected better of them.
 
PhilP said:
Slightly off tangent, there are reports that the supply of Delrin chain has dried up.

I am trying to find out more on this.

PhilP.
Click to expand...
My last project I wanted to use Delrin, and though the chain was available finding cogs of suitable internal diameter, and teeth numbers was very difficult.
 
Hal Farsed said:
Hello, I'd like a bit of help with IPEs latest version of their worm drive, if possible. I have had my fingers burnt before ( a long time ago) with these products and wondered how these latest ones fared reliability, quality and longevity wise before I chuck forty quid at one. Many thanks in anticipation!

26:1 High Torque gearbox metal gears | IP Engineering
Click to expand...
I doubt if a 3D filament print of this gear box can withstand the enormous force generated by the worm on the gear axis when the motion of the worm wheel drive is in the outside direction. When blockage occor this force wil be very large and cannot be handled with the weak bond between the separate filament layers. Normally one chooses the print direction so that the largest forces are in the same direction as the printed filaments. This is however not possible in the compact design. So the only proper 3D print solution will be using a SLA/DLP printer.
This type of printer uses a liquid plastic in a container and a laser or projector cures a liquid resin layer by layer on a print bed. The result is a very strong bond between the layers.
 
Many thanks for all the replies folks, I did replace the original IPEgears years ago with my own concoction, but that is now beginning to fail. As I mainly do shunting, starting and restarting upwards of fifteen wagons on dodgy bendy track is beginning to wear them out. Looks like I will have to bite the bullet and go expensive, which is difficult, because I am a tight git.
 
PhilP said:
Slightly off tangent, there are reports that the supply of Delrin chain has dried up.

I am trying to find out more on this.

PhilP.
Click to expand...
Yes I heard that I think in here a while back, shame as they are a great help for 4 wheel driving things.
 
You must log in or register to reply here.
Back
Top Bottom