Power Window Gear

[Stan]

Another couper asked if I could make the large gear from inside the power window motor.
Evidently the gear teeth have been stripping and a replacement for this part is not available.
Often the price of any machined item is impacted by the number to be made.

Does anyone else have the problem of this window gear stripping?

 

[Stevehose]

it eventually happens to all of them if the window regulators get sticky.

 

[adawil2002]

Here's a thread about the demand.
http://www.e9coupe.com/forum/showthread.php?t=14665

 

[Stan]

Looking at the opld thread, I see maybe 6 gears needed.
Anyone else?

 

[Stevehose]

Depending on price, I'd take 4 and replace each box once and for all

Looking at the opld thread, I see maybe 6 gears needed.
Anyone else?

 

[adawil2002]

I'd be in for 4. I had a back up but it stripped too.

 

[kasbatts]

yes, I'd be in for 4 as well

 

[andyleonard]

I'm still poking Matthew at Garagistic. The question is whether it's possible to make an all-plastic gear that would hold.

Does anyone know if the earlier gearboxes had plastic gears? Or are they all steel and nylon? No sense reproducing a bad design.

 

[andyleonard]

Stevehose, did you ever send me the dead gear we spoke of?

Anyone?

The one I have is split and can't be recompressed to fit the steel center again.
So nothing to copy.

 

[michael]

Whenever you park/store your CS always leave all windows open slightly. It relieves pressure on the plastic gear part and reduces wear and the inevitable stuck window syndrome, which could result in worn gear teeth.

 

[chchnz]

4 More!

I would be in, maybe halves on postage Kasbatts?

 

[Stevehose]

Shoot no, sorry, I will send Sat

Stevehose, did you ever send me the dead gear we spoke of?

Anyone?

The one I have is split and can't be recompressed to fit the steel center again.
So nothing to copy.

 

[loloe13]

interested for sure, but depends on costs again, thanks Stan

 

[rsporsche]

Stan,

if the price was reasonable - i would be in for 4
scott

 

[andyleonard]

Matthew wants to try an all-plastic gear first, for cost reasons.

Comments?

 

[Stevehose]

It wil distinegrate like the current ones imho. They bear a lot of torque.

Matthew wants to try an all-plastic gear first, for cost reasons.

Comments?

 

[kasbatts]

I would be in, maybe halves on postage Kasbatts?

Yep, for sure

 

[deQuincey]

Matthew wants to try an all-plastic gear first, for cost reasons.

Comments?

somehow i think it is sound to consider plastic
have you asked yourself why bmw produced them in plastic instead of metal ?

 

[andyleonard]

somehow i think it is sound to consider plastic
have you asked yourself why bmw produced them in plastic instead of metal ?

My concern is that the splined mounting in the center won't take it with an all-plastic gear.

I have asked this question twice with no answers yet: did BMW ever make an all-plastic gear...or al they all the same?

 

[Tom2240]

I would think they designed one part to wear first and made it small and replaceable, only you can no longer find replacements