Improving the Silver Dollar
- rc garage berlin
- 1/4 scale guru
- Posts: 309
- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Improving the Silver Dollar
Hallo friends of the Silver Dollar.
I just bought one. The gears were in perfect condition.
One bearing was totally destroyed. I ask myself why?
In my oppinion, the original bearing "NICE 1602 DC" is
not the right one for this application.
In an worm gear you have high axial forces espacially if you run them in Dragsters.
To handle these forces you need a Thrust bearing or a spherical roller thrust bearing
(like you can see in the third picture).
I build the Silver Dollar in CAD so lets see if we find a soultion for that problem.
Is there someone who made the same experiences or got any idea?
Michael
I just bought one. The gears were in perfect condition.
One bearing was totally destroyed. I ask myself why?
In my oppinion, the original bearing "NICE 1602 DC" is
not the right one for this application.
In an worm gear you have high axial forces espacially if you run them in Dragsters.
To handle these forces you need a Thrust bearing or a spherical roller thrust bearing
(like you can see in the third picture).
I build the Silver Dollar in CAD so lets see if we find a soultion for that problem.
Is there someone who made the same experiences or got any idea?
Michael
Re: Improving the Silver Dollar
I just wish the input shaft was bigger than 1/4".
- rc garage berlin
- 1/4 scale guru
- Posts: 309
- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Re: Improving the Silver Dollar
This is the next design fault and because of the flat area it´s in the end much smaller than 1/4".
- rc garage berlin
- 1/4 scale guru
- Posts: 309
- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Re: Improving the Silver Dollar
These are two samples what happens to this area in case of high Forces...
It is very important to use two large Allen Screws with flat end for mounting.
It is very important to use two large Allen Screws with flat end for mounting.
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- sample1.jpg (66.47 KiB) Viewed 5173 times
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- sample2.jpg (90.91 KiB) Viewed 5173 times
Re: Improving the Silver Dollar
Very interesting and good to know. I am following high quality your work.
- rc garage berlin
- 1/4 scale guru
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- Joined: August 24th, 2010, 4:57 am
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Re: Improving the Silver Dollar
...I found two new bearings that fit the Silver Dollar and make it possible to separate the axial and radial Forces.
Notice: The direction of the high axial force depends on the direction of Rotation.
Notice: The direction of the high axial force depends on the direction of Rotation.
- rc garage berlin
- 1/4 scale guru
- Posts: 309
- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Re: Improving the Silver Dollar
I added a few screws and two gaskets to fill the gearbox with oil.
- Mike Casey
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Re: Improving the Silver Dollar
This is some incredible work. Keep it up!
www.quarterscalelegends.com The Awesome history of 1/4 scale!!
Re: Improving the Silver Dollar
Filling with oil is a good idea. I have a Skellenger that's been modified (not by me) and filled with oil.rc garage berlin wrote:I added a few screws and two gaskets to fill the gearbox with oil.
Kaye
- rc garage berlin
- 1/4 scale guru
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- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Re: Improving the Silver Dollar
I think oil is much better than grease in this case. Every Time I opened a gearbox filled with grease, the grease is everywhere but on the gears...
- rc garage berlin
- 1/4 scale guru
- Posts: 309
- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Re: Improving the Silver Dollar
some silver dollars seems to loose oil
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- 7-01.jpeg (29.57 KiB) Viewed 4618 times
Re: Improving the Silver Dollar
Very nice,is that your car? Photo can't be enlarged, are you saying the line goes to an oil reserve or is it for a vent?
- rc garage berlin
- 1/4 scale guru
- Posts: 309
- Joined: August 24th, 2010, 4:57 am
- Location: Berlin
Re: Improving the Silver Dollar
No, it is not my car. I found this picture and wondered why there is this tube running to the point where you normally refill oil to the gearbox. In my oppinion that only makes sense when you loose a lot of oil...