Pimped my Surefire Pen

[mark greenman]

After some testing at the junkyard, I deduced that the 440 stainless ball bearing on the SF pen was an unreliable glassbreaker.

So, after some further testing, I decided to swap it out with a 3/16" Silicone Nitride ceramic BB, as these break automotive glass more effectively.

From my original test:

Here's the same BB, now mounted in my pen. Not only does it work better, but I also think it looks pretty pimpin'

Big thanks to the guys over at USN who helped me along the way.

-Mark

 

[orthogonal1]

Any info on how to perform the swap?

 

[HardUse]

I like it

 

[ericb445]

Where do you buy that BB?

 

[mark greenman]

In order to remove the BB, you need to try two options.

1. Remove the head, hold it in a pair of pliers upside down, BB facing the ground, and hit it with a blowtorch until its red hot. Hopefully, the metal will expand enough for the BB to just fall out.

2. If that dosn't work, you will need to drill out the BB from the opposite side with an 1/8" drill bit.

Once the BB is removed, you simply insert the 3/16" ceramic BB into the hole, and press it in with a vice.

BB's can be purchased here, but you need to buy 10 at a time:
http://www.vxb.com/page/bearings/PROD/Loose-Ceramic-Balls/Kit7613

I have a few extra, so if you want you cans send me a few bucks and a self addressed envelope and I can send you one. Just shoot me an email.

 

[Bushman5]

Sweet mod!

 

[Cash427]

Cool mod! Thanks for the pics!