need help quick

[goatboy_k]

hi everyone, im in the middle of making a goodman light adaptor.

i need the diameter of a C-cell mag light tube (the part the batteries go it) very quick before i have to leave work

tolerance to the .001 if you can do it please

thanks all for a quick reply

kurt

[KrisB]

I have no idea how big the Maglite tube is for a C-cell light... frankly I don't care. The only Maglites worth having have at least 3 D cells...

But, here's the info on the C-cell battery:
Specifications call for it to be 26mm in diameter, 46mm in length. Allowed tolerance is +/- 1mm. The length may increase if an endcap is used (which most do).

Source: http://www.powerstream.com/Size.htm

[goatboy_k]

i agree, i own the 6 d cell myself, but the part is not for me, it is for a custom dive light that uses the housing from a c-cell. thanks anyway

kurt

[KrisB]

well, it's safe to assume that its inside diameter is at least 27mm.

What exactly are you needing anything closer for?

Remember, the manufacturing tolerances of the Maglites may not be any more that 1/10th (or even larger) of a mm -- you don't know their specs.

[goatboy_k]

yes i realize that everyone has tolerances for their parts, i'm building a goodman light adapter for someone and need a pretty close measurement off someone's light because the adapter uses what somepeople call a split ring, the ring can only crush so far so you have to be within about .005 or so otherwise it won't even go in, or it won't crush enough to grab the shaft (light).

here are some pictures to show where im at now, the bore is roughed to within .025 of where i think it will end up, so not finished quite yet

the part is machined from solid brass with bead blasted finish. the two screws next to each other is for mounting to the handle, the countersunk screw is for crushing the ring. the grooves in the outsite are to take some weight out, it will prob add some lightning holes for more weight reduction after i figure out exactly where the bore will fall

enjoy

kurt

[goatboy_k]

#2

[goatboy_k]

#3

[goatboy_k]

#4

[Padipro]

KrisB,

Mag-Lites aren't even worth having. The only light worth having is the Ultrastinger rechargeable. LOL

Now with that said...

Kurt the measurement is 1.255 inches outside diameter. The ring looks great and thanks for making it for me, I really appreciate it.

Let me know if there is anything more you need.

Scott

[pcscuba]

Padipro, what are you doing about the loop around your hand. BTW the adapter looks great!

[Padipro]

.080 aluminum about 1 inch wide, bent to fit around your hand, big enough to be adjustable for the thickness of the gloves you're wearing and held together with SS screws and cap nuts.

I got the material at work but I have seen strips of the same material at Lowe's and Home Depot.

I may have to re-make the handle depending on how the adapter goatboy is making fits. But that's not to difficult.

Scott

[goatboy_k]

i cut the bolt hole spacing according to the print you gave me. the light is gonna mount pretty low to the handle so you might have clearance issues with the bell part depending on where you put them in the handle, might have to move forward to give the bell room to clear, but if you used the same spacing between holes the adapter will fit

kurt

[pcscuba]

Goatboy, how much would you charge to make a ring like that for me?

[goatboy_k]

ive been thinking about making a small run of these after the adapter project, got most of the kinks worked out with this prototype.

i could prob turn out a whole handle assembly. that is handle + an adaptor sized to whatever light your running. For somewhere in the $75 dollar range depending on what you wanted it made out of. Brass, Stainless, and exotics like Titaninum would be more depending on material costs. Aluminum would prob be the cheapest route.

if you have something in mind let me know. What size light your using and what material your intrested in. I can make whatever you want just have to let me know.

by the way padipro, your adaptor is in the mail.

kurt

[Padipro]

Kurt,

I disambled the light this evening and installed the adapter. Everything looks great and there was only one problem that I overcame but is a pain.

The clamping screw for the split ring is just slightly below the edge of the inside of the adapter and interferes with the body of the light head. I had to completely remove the screw to install the adapter on the light and then had a hard time re-installing the screw. I finally got it started and tightened down but it left a hefty mark in the body of the light head.

I think you were right about installing a few lightning holes in the adapter, it's very heavy and could be lightened up a bit. The taper on the one end is a little off, the angle looks as though it may be open a bit to much or not deep enough. There is just a slight gap between the adapter and the light head.

All in all it's a damn good idea and a very well made part. Thanks again. I'll post all of the pictures I took of it on the MSN site for everyone to see.

Pictures (http://groups.msn.com/Divelight/kurtslightheadadapter.msnw)

Scott

[goatboy_k]

yea i noticed that the screw was coming into the bore abit when i finished it up. I ended up putting all the bolt holes in before i did the final bore. Since i didn't know the final bore size the bolt holes kinda landed where my best guess was. when i found out the final bore size and put it in the screw came out a bit. As far as the angle goes i didn't really have anything to measure off of so it was my best guess as well. And yes i agree it could prob use some lightning holes.

Some flaws i agree, but theres always small problems with the first version of anything. Now that we know what to look for I can eliminate those problems from future versions.

kurt