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Different size Ansti stirrup

Posted: Fri May 24, 2019 2:45 pm
by IWallis
Hello, silly question really, I have two sets of Ansti plunger stirrups, one set looks about 7mm longer than the other.
I didn't realise there were different lengths. I'm guessing that the design changed over time, or perhaps different lengths for various model bikes; or could it be that it's just one of those manufacturing oddity's that happen? :)

Re: Different size Ansti stirrup

Posted: Sat May 25, 2019 1:37 am
by john.whiting
There are two basic types....1939-49 type.and 1950 on type......easily identified as the early type have equal length axle mount bits,whereas the 1950 type ,the axle mount is extended on the lower part,as a sort of a spur........Many associated parts are different too.......I have no doubt the Draganfly site has chapter and verse on the details............Incidentally ,the spur is of great assistance when trying to refit a non detach wheel in the dark,and many quality bikes ,rigid ,plunger and S/A have the feature.

Re: Different size Ansti stirrup

Posted: Sat May 25, 2019 5:35 am
by nevhunter
It's ANSTEY or ansty, named after the designer who designed a few other thing on bikes and cars I think as well. Just for the record. I'm having a bit of a time chasing up the details .Nev

Re: Different size Ansti stirrup

Posted: Sat May 25, 2019 10:18 am
by Pete.Silson
The early type with snail cam adjusters on the axle (4980-39, 4982-39) has a longer lower axle fork although, somewhat confusingly, the 1939-46 workshop manual shows equal length stirrup in the illustration whereas the 1939 and 1946 parts books show longer lower forks. The 1st picture below is from my 39 4G.
early type.jpg


The later type with a screw adjuster in the top of the stirrup (4980-50, 4982-50) has equal length forks. The Draganfly drawings appear to show the late type stirrup for both early and late type Anstey.
late type.jpg


There is also listed a third type (4980-57, 4982-57) presumably used on late square fours.

Pete

Re: Different size Ansti stirrup

Posted: Sat May 25, 2019 10:44 am
by IWallis
Ansti Anstey, iceberg Goldberg, same thing..... :D

Thank you for the excellent information.

Both sets of stirrups that I have, don't have a spur, and use a screw adjuster.

Re: Different size Ansti stirrup

Posted: Sat May 25, 2019 11:13 am
by roland robinson
The Anstey rear suspension takes it's name from the designer Frank Anstey who was employed by Ariel in 1939 but was previously employed by Rudge.

Re: Different size Ansti stirrup

Posted: Sat May 25, 2019 1:09 pm
by IWallis
The third type (4980-57, 4982-57) is aluminium.
Thanks for the info.

Re: Different size Ansti stirrup

Posted: Wed May 29, 2019 5:59 pm
by john.bebb
Just a throw in - In my experience I prefer to use the later stirrup with the threaded adjusters... the snail cams can be swines to adjust and tend to slip, particularly if the machine has a chair..
I put an add for my old ones in some yonks back... still no takers...
viewtopic.php?f=11&t=3136

Re: Different size Ansti stirrup

Posted: Wed Jun 05, 2019 11:52 am
by IWallis
Any idea what the stirrup bolt thread is?

Re: Different size Ansti stirrup

Posted: Thu Jun 06, 2019 7:07 pm
by Pete.Silson
5/8" 20tpi BSCy RH

Pete