Replacement for screw on Halcyon head

krautrob · March 6th, 2008, 08:59 PM

I managed to break the plastic screw that fixes the focus on my old style Halcyon light head, see picture and text in German:

http://www.theorie.physik.uni-muenchen.de/~helling/lampe.html

Does anybody have an idea where to get a replacement? I called an H dealer but they seem not to have this screw as a spare part.

Careful experiments with (metal) screws indicate the thread is slightly smaller than a metric M6 so it might be imperial. Does anybody now the specifications? Any opinions on using a metal (e.g. brass) replacement screw in the delrin body in case I cannot get the original part?

Liisa · March 6th, 2008, 09:19 PM

Quote: (Originally Posted by krautrob)

I managed to break the plastic screw that fixes the focus on my old style Halcyon light head.

Does anybody have an idea where to get a replacement? I called an H dealer but they seem not to have this screw as a spare part.

Silent Planet have stocks of just about all light components (excepting the most obscure discontinued ones...). All spare parts are available through UK/Eire dealers. However for a small item like this much less hassle for us just to send one to you. PM me with your address and I will have one put in the post for you. For reference, it's a "nylon focus lock-screw for Goodman handle". The part number is 20.000.511.

Regards
Liisa

Marijn · March 6th, 2008, 09:25 PM

About the using of a metal screw..

Regardles of the metal, its waaaay harder than the delrin so its going to kill the existing threading.
Although it wil basically cut its own threading, i'm not sure is this will hold well in the long run.

You might want to give Eddy van Vliet a mail.
info@scubasupport.nl

He builds and repairs prettymuch anything that give light and is DIR.

rjack · March 6th, 2008, 09:55 PM

The screws are imperial 1/4 inch x 20. Not sure if that helps you find one.

March 6th, 2008, 08:59 PM	#1 (permalink)
krautrob(Offline) New Member Join Date: Jan 2006 Location: Berlin/Munich Posts: 60	Replacement for screw on Halcyon head I managed to break the plastic screw that fixes the focus on my old style Halcyon light head, see picture and text in German: http://www.theorie.physik.uni-muenchen.de/~helling/lampe.html Does anybody have an idea where to get a replacement? I called an H dealer but they seem not to have this screw as a spare part. Careful experiments with (metal) screws indicate the thread is slightly smaller than a metric M6 so it might be imperial. Does anybody now the specifications? Any opinions on using a metal (e.g. brass) replacement screw in the delrin body in case I cannot get the original part?

March 6th, 2008, 09:19 PM	#2 (permalink)
Liisa(Offline) New Member Join Date: Apr 2006 Location: Dorset - Europe's premier diving destination (allegedly...) Posts: 16	Quote: (Originally Posted by krautrob) I managed to break the plastic screw that fixes the focus on my old style Halcyon light head. Does anybody have an idea where to get a replacement? I called an H dealer but they seem not to have this screw as a spare part. Silent Planet have stocks of just about all light components (excepting the most obscure discontinued ones...). All spare parts are available through UK/Eire dealers. However for a small item like this much less hassle for us just to send one to you. PM me with your address and I will have one put in the post for you. For reference, it's a "nylon focus lock-screw for Goodman handle". The part number is 20.000.511. Regards Liisa __________________ Silent Planet Halcyon distributor for UK and Eire

March 6th, 2008, 09:25 PM	#3 (permalink)
Marijn (Online) Smurf #1 Join Date: Aug 2007 Location: Papendrecht, The Netherlands Posts: 379	About the using of a metal screw.. Regardles of the metal, its waaaay harder than the delrin so its going to kill the existing threading. Although it wil basically cut its own threading, i'm not sure is this will hold well in the long run. You might want to give Eddy van Vliet a mail. info@scubasupport.nl He builds and repairs prettymuch anything that give light and is DIR. __________________ Its a fact that the humans can't go without water for more than 3 days

March 6th, 2008, 09:55 PM	#4 (permalink)
rjack(Offline) wet behind the ears Join Date: Nov 2005 Location: Seattle, WA Posts: 860	The screws are imperial 1/4 inch x 20. Not sure if that helps you find one.