skiron_2500

Hello everyone.

The largest three cogs on my Regina Oro BX 5sp freewheel are loose. They rattle slightly, although they are still in their 'slots'. I've tried tightening the smallest cog, which screws onto the freewheel, and thus presses all of the larger cogs into their slots, but it's gone as tight as it will go, it seems.

My first query: is it a problem to have a bit of looseness on the larger cogs? Or should I invest in two chain whips, in order to unscrew the smallest cog, take everything off, see what's going on, and then re-assemble, keeping everything tight?

My second query: does anyone know how the Regina Oro BX 5sp assembles? Am I right in thinking that only the smallest cog screws on, or does perhaps the second-smallest cog also screw tight? The diagram of assembly is on the back of the box, but that box is in a different country to me.

Many thanks!

:-)

Andrew R Stewart 

Many of the freewheels from the 1970s/1980s used a combo of both threaded and splined cogs. Sometimes with two steps of each. So without seeing a break down drawing or actually taking one apart I can't say exactly how it goes. Maybe someone else will remember. Andy.

JohnDThompson 

Paging @PastorBob, paging @PastorBob…

ThermionicScott 

Signal boost to @pastorbobnlnh.

pastorbobnlnh 

Sorry guys I was not online last evening! Just spotted this before heading into sermon writing mode!

@skiron_2500 I can't recall if I've worked on a 5 speed Regina BX, I just remember them always being 6 and 7 speeds. I'm surprised that you mention that the three largest sprockets are loose. However, the 5 speed body is probably made a bit differently.

On the 6 & 7 speed models, the 2 largest sprockets are held tight by the third sprocket which is threaded. A picture of the outer body helps to illustrate how this works.



The next photo shows all 7 sprockets removed. When mounted they go onto the body in this order: 2 largest splined, third threaded, fourth and fifth splined, sixth threaded to the body, the seventh threaded to the sixth.



FWIIW, the Suntour Perfect/ProCompe 5 speed freewheels use 3 splined largest sprockets followed by 2 smallest threaded. In this case you need to tighten the fourth sprocket, followed by tightening the fifth sprocket.

The picture below is of Perfect bodies. L-R, 6 speed normal, 6 speed Ultra, 5 speed.



(I always describe the sprockets by the order they are mounted on the body, thus first is always the largest.)



As you can see

skiron_2500

Thank you very much, pastorbobnlnh.

(I should have mentioned that it's a Regina Oro BX 5 speed.)

Your pictures have jogged my memory, and I think that my freewheel was built like this:
-the first four cogs are splined into the body
-the fifth cog screws onto the thread.

I think the problem is that the fourth cog has come out of its grooves whilst I was screwing on the fifth cog. The fourth cog's grooves cut through the threads, which means that it is probably jammed and not allowing the fifth cog to screw on fully.

I think this is a design flaw: all four cogs held in place by just one screwing cog?!

I'll head to the shop to buy those chain whips, then! ;-)

If, upon inspection, there's a problem with my freewheel -- e.g. the grooves for the fourth cog are ruined -- then do you have any 5 speed freewheels for sale? With 28 teeth on the largest cog??

Very best,

Barnaby

fietsbob

Older Regina Screwed on all the cogs , last ones Left hand threaded on from the back.

Newer ones, shown, mixed splined and Screwed on..


Splined cogs mixed with the High gear cogs screwed on became how everyone did it..

[Including shimano's earliest cassette hubs]





'/,

pastorbobnlnh 

Barnaby, here in the States we like to say "A day late and a dollar short!" Basically what this means is that our timing is off! I have a neighbor and friend who is from Athens and has been visiting family there for the past 6 weeks. Back in early September I could have handed her a 5 speed freewheel to fly with her to Athens and you could have saved postage. She returns home to the US the end of this week.

I do have five speed freewheels which have been cleaned and serviced and should serve you well for years to come. However, the cost to ship to Greece is about $34USD, which is more than what the cost of the freewheel would be. So keep this in mind and see if you can locate one in Greece or Europe.
However, for these old 5 speed Reginas (where all the sprockets are threaded), there would be no way for the three largest threaded sprockets to be "loose and rattle" as the OP describes.

fietsbob

True , shim washers would take Up the slack like Sachs Malliard Aris used

skiron_2500

My, thank you for the thought, Bob! (And for teaching me a new saying!)

To be honest, though, the postage that you quote isn't that dear, and your freewheels look beautiful; I'd rather go to a trustworthy source to buy one in a beautiful condition, than buy a less beautiful one of unknown provenance on ebay.

I'll post the results of my disassembly of the freewheel cogs in a few days, and then we'll see if I need to take you up on your offer. In any case, it might be nice to have a spare freewheel around the house; I've had two destructive incidents with Regina Oro freewheels before (the older ones, where all, or most of, the cogs screw on): once, by destructive disassembly, in order to get at a broken spoke (everything was too stiff to unscrew in the normal way), and once, cracking a cog (can't remember how I did that).

All the best,

Barnaby

skiron_2500

Answer: I'd put the the smallest spacer on the wrong way round. Thus it wasn't holding everything in place. Silly me; I'd rushed the job before going to work!

I have pictures of my disassembled Regina Oro BX 5 speed, for the record; I'll upload them when I work out how to do so! Haven't used a web forum like this in a fair while.

~Barnaby

AnkleWork

So, how loose are they?

skiron_2500

Here are the pictures of the dis-assembled unit.









The second-to-last image shows how I put the 'lockring' on incorrectly.
The last image shows how I put the 'lockring' on correctly.

:-)

nerzo

Hello,
let me hijack this older thread with another Regina Extra BX Oro 5-speed question: what would be the best chain width to use with the Oro BX 5-speed freewheels – the BX standard itself which is narrower at 7,2mm or the older normal style at 8,1mm? That is, would the old, normal standard of Regina, or Everest chains at around 8mm work with the BX Oro 5-speed cog spacing?
Thanks

fietsbob

now 5 to 8 speed use all the same chain..

JohnDThompson 

A chain designed for a 7 or 8 cog cluster ought to work fine.