Maglight glass lens

kb0rrg

Enlightened
Joined
Jan 12, 2001
Messages
289
Location
Renton, Wa
I see that Bright Guy sells a glass lens for the C/D maglight.
Does anyone have one?
Is it pyrex or regular glass?
Does it fit well?
Is it intended for the Mag Charger?
 
I've seen glass lenses for the C/D Mags too. The guys at the dumpstore where I found them at said they increase the reach of the beam a bit. I don't know if it where the same type of lenses you're describing. I also don't know if they where pyrex or not.

Given the fact that the MagCharger is a LEO flashlight with an virtually unbreakable soda lime lens, and glass is more likely to break, I don't think that they are intended for the MagCharger. But if they fit, you can try. Just don't drop the light.
smile.gif



Greetings,
Velcro
 
if irc the glass lens on the magcharger is 'borosilicate' - like the glass used in laboratory beakers...on the tougher side, I suppose..
 
Does anyone know if the Mag-Charger lens itself is interchangeable with a C or D cell head lens ?

I just checked their site, and the M-Ch lens is described as "tempered glass ... withstands extreme temperatures".
I've also read in their literature that the M-Ch lens is "Soda-Lime glass"
What's Soda-Lime glass ?

The M-Ch lens is available at about $6-7. I have a link for a US supplier somewhere if anyone wants me to search it out.

lightlover
confused.gif
shocked.gif
wink.gif
smile.gif


Nathan, I think I know why you're asking this ......
 
From "Glassblowing, The Technique of Free-Blown Glass" by Frank Kulasiewicz:

p86

Boro-silicate glass:

Boro-silicate glasses are commonly referred to as "Pyrex," and their compositions vary. These glasses substitute boric oxide (B2O3) for some of the silica. They are used for applications that require rapid changes in tempature without cracking caused by thermal shock. Although some craftsman have used these glasses for hand work, you find they are difficult to melt and require high tempatures. One "Pyrex" type glass has proportions of 80 silica to 13 boric oxide to 4 sodium oxide to 2 aluminum oxide. Surface melting tempatures are in excess of 3000oF.
p89

Sand/Soda/Lime Glass:

By far the largest percentage of glass melted today is refered to as sand, soda, and lime or soda/lime. The silica is the glass former, the soda the flux (melter), and the calcium the stabilizer. There are great differences in the working properties of these glasses, and in the finished glass. This is because the proportion of the oxides are changed, and because soda/lime glasses are seldom melted without the addition of other materials. Some of these glasses set-up (harden) very fast with a temperature drop of only a few degrees. These fast-setting glasses are developed to use with fast machine production-such as bottle-making machines. Others have a slow setting-up time, making them "easy" or "long-working" glasses suitable for hand processes. The latter groups are these we are interested in. Most soda/lime glasses have proportions of about 70 silica to 15 soda to 15 lime. The surface melting temperature for such glasses is about 2700oF., however changing the proportions and adding other oxides can lower the melting tempatures.
 
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by *something ridiculous:
I just checked their site, and the M-Ch lens is described as "tempered glass ... withstands extreme temperatures".<HR></BLOCKQUOTE>
http://www.milgardtempering.com/html/glasster.html
Tempered Glass
Glass that is strengthened through the process of heating and then cooling the surfaces rapidly. This creates surface compression and tensile strength that causes glass to resist breakage, yet disintegrate into small pieces if a break occurs. Fully tempered glass must have a surface compression of 10,000 psi. This process produces glass four times more impact resistant than non tempered glass.
 
So it looks like we can conclude that it's just plain glass that is heat treated to make it stronger.

-john
 
Top