I had designed an angle cock several years ago for a customer, and just needed to re scale, but i had not made the hose coupling. i had been buying Proto hands many years ago, but never got even close to a full compliment. working with some prototype info i came up with this:
these are very close to scale 1:20 and have a hole in the center for a 1/16 dia x 1/16 lg magnet.
other than removing supports i cleaned up the 1/16 dia hole with a 1/16 four flute end mill and glued the magnets in place.
for comparison, my new hose coupling is on top , next down is the Proto hand version, Accucrafts monstrosities, and Hartford Products.
although the Proto hands version uses a bigger magnet(1/8" dia)
i am finding on initial tests these smaller magnets are preforming well, and considering the weight of the plastic verses metal. the Accucraft will be the first to be refitted. i need to make a jig for fitting the hose length.
i did consider copying the Proto Hands version, but in the end will probably change all out. one other though i have had is to equip loco’s and cabooses with these but with a steel slug instead of the magnet so they will be universal.
Al P.