Transmission end problem

[SCjim]

I am in the process in making some "Teacher Pens" for a special order. I assembled a few with no problem. Some the ends of the transmissions that I apply pressure is being crimped as I push them in the body. I have ordered some re-placement transmissions. I did notice that all even the ones I assembled are also crimped but not enough for a problem. What am I doing wrong? Or are they just cheap transmission?
Sorry if this is the wrong form.

 

[magpens]

Are we talking about the PSI Teacher's Pen Kit which has 2 transmissions ? :-

Teachers 24kt Gold Twist Pen Kit

Here's a practical pen that makes an ideal gift for your favorite teacher (or accountant).One end writes in red. the other black. Mini ballpoint refills included.

www.pennstateind.com

https://www.pennstateind.com/library/PKTEACH_ins.pdf

 

[SCjim]

Are we talking about the PSI Teacher's Pen Kit which has 2 transmissions ? :-

Teachers 24kt Gold Twist Pen Kit

Here's a practical pen that makes an ideal gift for your favorite teacher (or accountant).One end writes in red. the other black. Mini ballpoint refills included.

www.pennstateind.com

https://www.pennstateind.com/library/PKTEACH_ins.pdf

Yes I believe that is where they came from. I have had them for a time as I buy most of my kits from them.

 

[SCjim]

Yes I believe that is where they came from. I have had them for a time as I buy most of my kits from them.

PS: I'll try tp post a photo.

 

[SCjim]

Here's the problem

 

[qquake]

That looks like some serious damage. How exactly are you pressing them into the tubes?

 

[SCjim]

That looks like some serious damage. How exactly are you pressing them into the tubes?

I used the use the PSI Assembly/Disassembly press. Same press I have used many times with know damage to transmissions.

 

[qquake]

I used the use the PSI Assembly/Disassembly press. Same press I have used many times with know damage to transmissions.

I've never used one of those. But if the #3 ram presses directly against the transmission, I can see where that could cause damage. I use my drill press to press pens together, and have a piece of Delrin I mount in the chuck to press with.

https://www.pennstateind.com/library/PENPRESSXL_INS.pdf

 

[SCjim]

I've never used one of those. But if the #3 ram presses directly against the transmission, I can see where that could cause damage. I use my drill press to press pens together, and have a piece of Delrin I mount in the chuck to press with.

https://www.pennstateind.com/library/PENPRESSXL_INS.pdf

Thank you I will try your method. I'll keep you posted.

 

[qquake]

Thank you I will try your method. I'll keep you posted.

The PSI press seems like a poor design to me, if it doesn't have a softer piece to press the parts with.

 

[SCjim]

I'm not sure where I got the Teacher Pen Kits but I think I solved the problem.

1. I used a better transmission
2. I used a piece of Delrin against the pusher of the press.
3. I polished the inside of the tubes with 400 grit emery cloth on a drill "wipe"

I'm not sure which stage solved the problem but using a better transmission may have been the only step needed (LOL). But that was my last step.