Triumph phonograph combination gearing ?

[Back2skooldaze]

Hi i wonder if someone on this forum would be able to help or shed some light on an issue i have found when fitting a 2+4 minute gearing system on the Triumph model B ?

I have taken off the original 2 minute mandrel with the attached feed screw and the left side bearing.
I have put the gearing system together and installed it and it works perfectly but what i have found is there is a couple of 2 minute cylinders that i play on my Home model A with the exact same gearing system where you pull the gear out by the flange wheel and then push back in to revert back to 2 minutes.
On some off my 2 minute cylinders on the gearing system i have installed on the Triumph i have found that the song thats nearly to the end does not finish on the gearing system i have installed?
I have the collar as far to the right as possible and i seem to have either not enough groove on the feed screw or the collar needs to be more to the right but this can't be because the collar can't go any further as there is a stop on the feed screw that goes in to the collar and then when tightening the collar there is a little hole/dimple on the mandrel where the screw tightens down?
The 2nd half nut to the right seems to hit the collar before the song finishes? I mean there is only a couple of bits to the ending of a song when this happens? If there was like a tiny bit more groove in the feedscrew then all would be ok? Also if there was only 1 half nut then again this would not be a problem but as the Triumph model B has 2 half nuts its the 2nd one to the right that hits the collar before the song finishes? I have spent all Sunday on this and did not finish until 11.00pm at night.I cleaned down and finished off with a play of a 2 min cylinder then a blue amberol before putting the machine away.

I have contacted the guy who i have bought the gearing system off and mentioned this so i'm just waiting to see what he say's? But in the meantime does anyone know of this problem with the 2nd half nut hitting the collar before the song finishes?

I have measured the original mandrel with the feedscrew on and put that against the one i have fitted and they appear to be the same lenghth but what i have noticed is on the original mandrel the part that goes through the bearing it appears slimmer so you have a lot to play with but on the gearing system i have fitted the collar is as far as it will allow so i have about a second or so left of the song before it finishes?

[Back2skooldaze]

OK had a reply from the seller and he mentions i need a feed nut and bar an angled one ???

I have not seen this part before and as this is my first time installing a 2+4 minute gearing i did not know i had to replace the existing feed nut and bar for an angled one ??????

All day i have been taking the whole thing off and restarting from scratch only to come to the same ending which the gear system work great and i have played some 2 minute and 4 minute/amberols very good its just that there is a few 2 minute ones i have that the double half nut seems to hit the collar before the last 1 or 2 seconds off the song has finished.

So at least i know now i have been installing everything correctly apart from i did not know about the feed nut and bar needs to be replaced with an angled one???

Has anyone got a link to some pictures of this angled feed nut and bar so i can see what it is????

[Back2skooldaze]

Has anyone got a triumph model B with the double half nut and bar and have 2+4 minute gearing fitted???

Do i need to replace my existing double half nut and bar with an angled one or could i replace my existing one with a single half nut and bar which would solve the problem as there is plenty of space for a single half nut to completely finish playing a cylinder or i could just remove the right sided half nut as this would also solve the problem but i want to have things correct.

Has anyone had to change there double half nut and bar for a single one????

[Back2skooldaze]

Has anyone got a single half nut and bar for sale for my triumph model B ????

Thanks

[Back2skooldaze]

FOUND a brand new wide triumph nut and bar