Lehner issues.

[Hakan_J]

Hi all,

I have been searhing the forums for a couple of problems Im having but without luck :(

This has probably been discussed before but I just cant find any info

I have two problems with my Lehner right now:

* My pinions keeps getting loose no matter how hard I tighten the screw
- Has anyone tried making a flat "spot" on the shaft on a lehner with only 4mm shaft? Has anyone tried it on any other motors?

* I have managed to strip the thread on two of the holes in my Lehner.
- Anyone have any advice on how to fix this or advice on how to avoid this from happening to my other holes?

Thanks in advance!

Br,
Håkan J

well i have seen some people use threadlock on the grub screw on pinions.

about the hole threads i would make sure that your machine screws fit snugly into the lehners thread.
I know some m3 machine screws are not a close fit.
Also how deep are your machine screws going into the motor when you mount?

[Hakan_J]

Originally Posted by chilledoutuk

well i have seen some people use threadlock on the grub screw on pinions.

about the hole threads i would make sure that your machine screws fit snugly into the lehners thread.
I know some m3 machine screws are not a close fit.
Also how deep are your machine screws going into the motor when you mount?

Im going to test using threadlock but I fear I might have a problem when I want to change pinion?

I have measured my screws and cut them so that they should be as long as possible so I dont think thats an issue. I will check the fit on my m3 screws more closely!

[Patrick]

I dremel a flat spot on my motor shafts, and I think most other people do as well.

[dadnjesse]

I think you should always use thread lock on the set screw!, I use the red and never have a problem. Then to take it off you can heat the set screw with a soldering iron, or I use a small butane torch.

[Dafni]

Ask Mike for his Lehner frontbell cover. You'll never have to worry about stripped holes on your Lehners ever again.

Daf

[Hakan_J]

Originally Posted by Dafni

Ask Mike for his Lehner frontbell cover. You'll never have to worry about stripped holes on your Lehners ever again.

Daf

That sounds great! Do you have any pictures?

[jhautz]

It looks like this.

Works like a charm.

[Hakan_J]

Wow that looks great!
I will definitely ask Mike for a couple of those!

[Finnster]

You def need a flatspot on the shaft. 5 min w/ the dremmel & its done. I (sometimes) use the blue locktite and a good hex driver and haven't had a setscrew come loose since IDK when.

[Hakan_J]

Originally Posted by Finnster

You def need a flatspot on the shaft. 5 min w/ the dremmel & its done. I (sometimes) use the blue locktite and a good hex driver and haven't had a setscrew come loose since IDK when.

But is it safe even with a 4mm shaft? I dont want it to break

[BrianG]

The flat spot needs to be just big enough to give something for the screw to work on. Also, blue lock-tite seems to be strong enough from what I've seen while making it relatively easy to remove.

[zeropointbug]

I agree, only use blue lock-tite... the red stuff will ruin your live!

I would also get that Lehner front bell cover as well, that should fix your problem.

I have also had luck flattening the bottom of the set screw. More contact area I guess. That combined with blue lock-tite.

Any motor without the flat spot on the shaft must get one first thing. O and that front bell cover is sweet, I will call mike for one even though I dont need it.