R.E.D.S. for Matrix355 -the learning curve-

TheTinker · Post by **TheTinker** » Fri Jan 18, 2013 9:42 pm

Can anyone tell me if the rubber bumpers on the S5 system are the same as on the Matrix R.E.D.S.? Obviously the mounting system is different but are the bumpers the same.
Thanks

Mo wannabe · Post by **Mo wannabe** » Sat Jan 19, 2013 1:21 pm

I compared them to my Nox and best I can tell they are the same . Same size anyhow . Maybe someone else knows for sure

Mo wannabe · Post by **Mo wannabe** » Sat Jan 19, 2013 1:21 pm

I compared them to my Nox and best I can tell they are the same . Same size anyhow . Maybe someone else knows for sure

Excal1 · Post by **Excal1** » Sat Jan 19, 2013 7:14 pm

They are the same. I took one off the Matrix and its just like the S5 on my other bows

TheTinker · Post by **TheTinker** » Sat Jan 19, 2013 8:42 pm

Much appreciated.
A 5/16 rod and a set screw should make the installation complete then.
I'll get a set of replacement bumpers ordered -think I saw them for about $15.

Boo · Post by **Boo** » Sat Jan 19, 2013 9:06 pm

The S5 has a big ball around 3/4" ball on the end that fits into the bumper.

TheTinker · Post by **TheTinker** » Sat Jan 19, 2013 9:19 pm

Woops...

Boo wrote:The S5 has a big ball around 3/4" ball on the end that fits into the bumper.

If'n you can would you confirm exactly what we have there? I have a metal lathe but turning a ball with a manual lathe is not an easy proposition. Maybe a tapped metal ball on a threaded rod?
...At some point it isn't going to be cost effective

THANKS

Boo · Post by **Boo** » Sat Jan 19, 2013 9:40 pm

How would you like me to clarify?

TheTinker · Post by **TheTinker** » Sun Jan 20, 2013 1:25 pm

Boo wrote:How would you like me to clarify?

Sorry BOO for not being clearer.
Short of purchasing a set of rubber bumpers and cutting one in half to see exactly what the molded shape is inside of it is, it would be helpful to have micrometer dimensions of the factory pin.
You had said previously, "The S5 has a big ball around 3/4" ball on the end that fits into the bumper." Would like to get the correct size to see if I can fabricate pins that will fit the bumpers correctly before ordering them.
Thanks for your patience

LongCarbine · Post by **LongCarbine** » Sun Jan 20, 2013 1:40 pm

The ball is .75 and is necked down on the back side to around .400 x.13 then it shoulders up to around .780

Boo · Post by **Boo** » Sun Jan 20, 2013 1:40 pm

TheTinker wrote:
Boo wrote:How would you like me to clarify?
Sorry BOO for not being clearer.
Short of purchasing a set of rubber bumpers and cutting one in half to see exactly what the molded shape is inside of it is, it would be helpful to have micrometer dimensions of the factory pin.
You had said previously, "The S5 has a big ball around 3/4" ball on the end that fits into the bumper." Would like to get the correct size to see if I can fabricate pins that will fit the bumpers correctly before ordering them.
Thanks for your patience

You don't know me very well do you?

The ball is around 0.7500000000000000000" or 3/4" in diameter. There is a melplat that measures 0.40000000000000" but I would suggest that you cut the ball so that it is much wider. How wide? Good question. The wider your melplat the longer your bumpers will last because it will leave an air pocket making for a bigger cushion as well as a wider surface that the rubber bumpers get pinched on. You could cut the ball in half for that matter. I been in on some experiments and it seems the more you cut the longer they last. Our tests are neither scientific nor are they conclusive. Note the words seem.
The neck measures 0.404"

Boo · Post by **Boo** » Sun Jan 20, 2013 1:48 pm

LongCarbine wrote:it shoulders up to around .780

That would be the flange that supports the base of the rubber bumper. The wider you make it the longer the bumpers will last. Make it the full diameter of the bumper.

LongCarbine · Post by **LongCarbine** » Sun Jan 20, 2013 1:49 pm

Tinker if you have a .375 radius tool the front side would be easy . on the back side groove it down to .4 and back .750 then turn your .375 radius tool upside down to do the back side. Or a .75 ball with a 3/8 tapped hole in it and a tapped thick washer for the back side shoulder would work .
Hope this helps.Jim

TheTinker · Post by **TheTinker** » Sun Jan 20, 2013 2:32 pm

EXACTLY what I was looking for. Thank you very, very much.

It seems to me that if I could find a brass ball finial like used in lamp making it would be a "Piece of cake"... speak of the devil; here it is: http://www.libertybrass.com/catalog.htm ... iew&cid=34
item#BALSOL075/B360R. Ordering me a pair of brass balls today!
Thanks again and have a great day!

JT of PA · Post by **JT of PA** » Sun Jan 20, 2013 2:40 pm

Tinker,

I am not mechanical like you; however, I am enjoying this thread.

Could you explain in layman terms what you are doing with this project?

What are you trying to improve on?

If you have the time ... thanks.

All the best.

Excalibur Crossbow Forum

R.E.D.S. for Matrix355 -the learning curve-

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