New Departure Model D Dating

[SKPC]

^^^Too much! You should move your maintenance job to a thread on "maintenance". We can all see how clean your discs are...sorry to come after you, but this thread is specifically for identification and dates, right?

Below is a wheelset I found on a late 1933 Colson motobike:refurbished. Rear 36hole, mod D scripted is without the oiler, and was paired with an hourglass ND "M" style unmarked front...TYVM..

 

[rustjunkie]

^^^Too much! You should move your maintenance job to a thread on "maintenance". We can all see how clean your discs are...sorry to come after you, but this thread is specifically for identification and dates, right?

Below is a wheelset I found on a late 1933 Colson motobike. Rear 36hole, mod D scripted is without the oiler, and was paired with an hourglass ND "M" style unmarked front...TYVM..
View attachment 934817

It'd be interesting to get measurements of the disc support sleeve and shell if you overhaul it.
pic of the brake arm?

 

[TieDye]

There were 11 bronze discs and 12 steel discs for a total of 23 discs.

In one of the model D breakdown diagrams I have says 23 total discs.

 

[Miq]

^^^Too much! You should move your maintenance job to a thread on "maintenance". We can all see how clean your discs are...sorry to come after you, but this thread is specifically for identification and dates, right?

If that's how you "come after" people here, I think I can take it.

The intent was to show what the disks look like and how many there are in the big arm = brake version I'm restoring, not "how clean your discs are". I think other folks looking at the thread on identification for ND D coasters might find that useful. I believe there are variations of these coasters with NO bronze discs and different combinations of round and toothed discs. Why not talk about it and show pics of that in this thread?

I guess the thread starter and moderators can decide if it's not appropriate for identification and dating. This is a forum for people who love old bikes and want to see pics of this stuff right?... I intentionally did not include the many other pics I took of the coaster restoration. I am showing that in the thread I started in Vintage Schwinn Lightweights about this bike.

-Miq

 

[Miq]

Thanks TieDye! Most of the documentation I've seen shows only 21. Good to see the dwg with 23!

 

[TieDye]

@Miq I have seen, and maybe have, other documentation showing less disks. I think the brass ones were earlier, maybe thicker? Which might account for a need for less? And, I am sure as the hubs evolved, parts were made stronger, revised, etc. It's all part of the knowledge we come here to learn and share so we can keep this hobby alive for future generations.

 

[SKPC]

It'd be interesting to get measurements of the disc support sleeve and shell if you overhaul it.
pic of the brake arm?

When I get a chance I would be happy to do that @rustjunkie !! Oh, and @Miq …..No worries man, I hear ya bud, but just one post and two or three pics would have provided all this info. There are very usefull and informative overhauling and friction disc threads if you search "New Departure Model D" in the thread titles.
No disrespect. Peace.

 

[Miq]

Nice pic of the black version big arm = brake from @bikiba last Sept. Black 2 indent cog nut and sprocket.

@rustjunkie You wrote that the black version was available from 40-49 right? With the big arm I'm thinking this one is early to mid 40's war era...?

 

[rustjunkie]

Nice pic of the black version big arm = brake from @bikiba last Sept. Black 2 indent cog nut and sprocket.
View attachment 972086

@rustjunkie You wrote that the black version was available from 40-49 right? With the big arm I'm thinking this one is early to mid 40's war era...?

That is the only arm I’ve ever seen on a black hub.
to clarify: i dont know the exact years that blackout hubs were produced, but given that afaik there’s none known with the 1930s or 1950s brake arm we can narrow it to 1940 start and theoretically 1949 end, although i suspect they were stopped soon after wwii at the latest.

 

[bikiba]

That is the only arm I’ve ever seen on a black hub.
to clarify: i dont know the exact years that blackout hubs were produced, but given that afaik there’s none known with the 1930s or 1950s brake arm we can narrow it to 1940 start and theoretically 1949 end, although i suspect they were stopped soon after wwii at the latest.

i watch ND stuff very carefully [ not that i am an expert by any means ] but i have only seen that style arm on a black hub as well