Re: 5" Tube rings needed

Hi Ian,

Ian Sharp wrote: 
Hi all,

Anyone come across tube rings for a 5" (125mm) tube anywhere?

Is it a 5"/127mm (outside diameter) tube, or a tube for a 5"/127mm aperture scope? There is a big difference, as the Synta 5"/127mm mak has a 144mm diameter tube. Rings are available for common scopes by name, but it's safest to measure the outside diameter of your tube carefully and supply that dimension as well as your scope type when enquiring about suitable rings.

Telescope Service in Germany have a selection of rings:
http://www.teleskop-service.de/Selbstbau/Rohrschellen/rohrschellen.htm
I've bought a number of items from them in the last several years, and they are competent and helpful (and can handle email in English).

Best Regards,
John.

P.S. The difference between 5" and 125mm is 2mm, which is a significant error for sizing a tube ring.
.

Relevant Pages

  • Re: 5" Tube rings needed
    ... There are some rings which supposedly adjust to a range of diameters, but I've no idea how good they are. ... Anyone come across tube rings for a 5" tube anywhere? ... 144mm diameter tube. ... supply that dimension as well as your scope type when enquiring about ...
    (uk.sci.astronomy)
  • Could be a craft-fair sort of project...
    ... Google DaVinci code game, I got to thinking that it might be kind of ... Then turn as many rings as you want with a notch in them the ... the tube would slip out. ... and fixed rings epoxied in place. ...
    (rec.crafts.woodturning)
  • Re: Cutting the steerer tube
    ... have 2 stack rings or a large ring above the stem. ... Just make sure shavings don't get in the bearings. ... goes all the way around the tube - so that as you carefully cut, ...
    (rec.bicycles.tech)
  • Fiberglassing
    ... Am going to use an extra long coupler in the single coupler joint and am going to have one of my 1/4" thin centering rings epoxied inside of the coupler and one of your 3/8" rings actually abutting up against the coupler. ... I am also going to use Duralco 4525 epoxy that is actually stronger than J & B Weld on the centering rings and in securing the engine tube and the couplers to the body tubes. ... I know I need to use shear pins for the upper main chute bay and nosecone but should I use them for the lower drogue bay and the electronics carrier? ...
    (rec.models.rockets)
  • Re: 5" Tube rings needed
    ... >Ian Sharp wrote: ... >> Anyone come across tube rings for a 5" tube anywhere? ... Rings are available for common scopes by name, ... >and supply that dimension as well as your scope type when enquiring ...
    (uk.sci.astronomy)