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Perpetual Project
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3,695 Posts
Discussion Starter · #1 ·
Anybody have any idea how hot a standard H4 bulb will get, not directly on the bulb per-say but within a few inches of it?

Are we talking under 250F say? Or would more like under 400F be a safer bet?
 

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Eff Tee Pee
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29,634 Posts
they get pretty hot. im not sure exactly, but i know that one of my dirtbike headlights has begun to melt after running the high beams for a day.
 

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All star !!!
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6,714 Posts
Bring it to DZ land...we can drill a tiny hole in the back and stick a temp wire in there....read what it says on my handy reader. :D
 

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All star !!!
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I was gona say, find one of those laser temp gauges. That'll tell you with out having to take anything apart.
We have those at work too..thing is, it will only tell temp of outside of lense...since that is what the beam will hit and sense first...the reflectivity of the inside coating will mess up the reading due to its emissivity( how is that for a tech word). In otherwords, the dreading would be incorrect. Now if you took the bulb out of the housing, plugged it in and lit it up, it would be more accurate, but still messed up with IR optical pyrometer.

Wire from inside the back would still be most accurate...real world. :D
 

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All star !!!
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I gotcha, but big words make head hurt, LOL.
I don't get to play with a lot of cool stuff at work, but I do some. Been playing more in the shop lately too....taught myself how to use a milling bit in about 3 minutes the other day at lunch.....big power tools are cool. :D
 

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Build It Ride It Live It
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10,684 Posts
Hell yeah. I actuall am looking at some vintage machines right now. They are tiny, but they were designed for the hobbist back in the 50's and ran through to the 80's. It's an all in one machine, so you get a lathe that can be converted to a mill. I gota get one so I can start working on some stuff.
 

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All star !!!
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6,714 Posts
Hell yeah. I actuall am looking at some vintage machines right now. They are tiny, but they were designed for the hobbist back in the 50's and ran through to the 80's. It's an all in one machine, so you get a lathe that can be converted to a mill. I gota get one so I can start working on some stuff.
I see those 3 in 1's in the harbor freight catalog alot, and wonder how good they would actually be???

I have an HF in the town I work in, so when I have enough money and room for one, I may get one.
 

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Build It Ride It Live It
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10,684 Posts
I've been talkin to some local machinist and some grey beards in the industry. A lot of them will say they are crap. There are some limitations to them considering sizes of material and certine procedures that may not be doable with them. Also heard they can be a little inaccurate. My theory is, for guys like us, if you are doing small production, custom parts that we are going to be paying a lot of attention to detail on. They should be ok. Once you get used to the machine you can work around any inaccuracies. I think they would be a good investment to learn on at least.
 

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Perpetual Project
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3,695 Posts
Discussion Starter · #11 ·
Sheesh, I go away for the weekend and you guys go and completely hi-jack my thread:myhijackedX:

I think I'll just have to wire up the bulb, turn it on, and get out the ole meat thermo. I only need to know the ballpark so I can choose what material to use.
 

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All star !!!
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6,714 Posts
Sheesh, I go away for the weekend and you guys go and completely hi-jack my thread:myhijackedX:

I think I'll just have to wire up the bulb, turn it on, and get out the ole meat thermo. I only need to know the ballpark so I can choose what material to use.
yeah, that'll work too. :D
 
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