Brass Base?

[how2]

Why do p60 drop-ins have a brass base?

 

[John_Galt]

heatsinking

Search is your friend. We have numerous threads on P60 Drop-ins, you could have asked your question there, instead of creating a new thread.

 

[kramer5150]

easily soldered. it also doesn't react with raw uncoated aluminum the way copper does.

SUPER easy to machine and debur, with very minimal tool wear.

 

[how2]

heatsinking?

What do you mean by Heatsinking?

 

[csshih]

power LEDs need heatsinking to survive. o.O

 

[kramer5150]

heatsinking?

What do you mean by Heatsinking?

http://en.wikipedia.org/wiki/Heat_sink

 

[how2]

If it's to draw away thre heat from the led then the thermal conductivity of Brass is very poor, compared to Aluminum

See http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html

Copper or silver would be better.

Is it to stop heat getting to the driver?

 

[John_Galt]

Brass is used because it's very easy to machine, and you can solder directly to it. It is not easy to get solid solder joints in Aluminum.

Also, drivers often need heatsinking themselves, especially in high power lights.

 

[Ragiska]

If it's to draw away thre heat from the led then the thermal conductivity of Brass is very poor, compared to Aluminum

See http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html

Copper or silver would be better.

Is it to stop heat getting to the driver?

but it's thermal capacitance is much higher than aluminum for a given volume, making it a better choice. copper would have issues with galvanic corrosion.

 

[MWClint]

at heat levels we see in flashlights... brass is just fine.
ive got a few brass p7 lights and there's no issues with extended runtimes.

you cant solder to aluminum.
copper can cause galvanic corrosion.
silver is too expensive.

brass is the answer