Author Topic: Ariel hub  (Read 513 times)

Offline morris

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Ariel hub
« on: 12.12. 2017 20:23 »
I’ve been offered an Ariel rear hub for the SA.
It currently has the full width hub with the brake lever pointing downwards which makes that the cable needs to go up at an awkward angle to join the brake pedal shaft lever.
Never been happy with the performance of the rear brake, although it could be due to the shoes which are of the bonded type and seem a bit hard.
I am thinking of either leave the FW hub and change the shoes, or replace the FW hub by the Ariel.
What’s general opinion here? Would the Ariel hub make a better brake?
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
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Online chaterlea25

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Re: Ariel hub
« Reply #1 on: 12.12. 2017 23:53 »
Hi Morris,
I think the spindle size is different on the Ariel wheel ??
That sounds like an awful lot of work to change everything around??

I went back to some old shoes and NOS linings from eBay, I made steel pads for the shoes so the arm worked at the correct angle to the cable (apparently originally the linings were thicker ?)
I shortened the cable, inner and outer to get it as straight as possible and got the cross over arm lever at
approx 90 deg angle to the cable, It now works fine  *smile*
All the pattern cables are too long to work properly *angry* *angry*

Try this guy for NOS shoes/ linings, I think it was from him that I got some shoes from at Stafford ??????
GP Relining Services
Gary Parkin
10 La Loirie
56200 Les Fougerets, Bretagne
France
Phone:0299906960
Email:parkin.gary@orange.f


John
1961 Super Rocket
1963 RGS (ongoing)

Online JulianS

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Re: Ariel hub
« Reply #2 on: 13.12. 2017 09:59 »
The point John makes about the cable is very important. Poor cable reduces braking power and makes it even more spongy.

With the Ariel hub and odd cable routing the chance is an even worse action.

The in the BSA brake plate the cam spindle holes do wear which does not help.

Try floating shoes as in the photo, the iron full width 7 inch brake takes the same shoe as A65 (which are shown) with same hub and the shoes from 7 inch Triumph full width front also fits.

New old stock Ferodo AM2 moulded linings could help just be aware of the danger of material inhalation and of not riveting properly.

Floating shoe linings were listed as 5/32 inch thick and non floating as 3/16 inch thick according to Ferodo. Rivet pattern also different between the two

Make sure the shoes are centralised.

Online muskrat

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Re: Ariel hub
« Reply #3 on: 13.12. 2017 19:06 »
G'day morris,
The swing arm is different in that the holes for the spindle are different sizes. The shoe width is 1/8" wider in the Ariel hubs.
I'd stick with the f/w BSA brakes.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline morris

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Re: Ariel hub
« Reply #4 on: 13.12. 2017 20:33 »
Thanks for the input guys.
That confirmed my thoughts. I’ll stick to the FW.
I spoke with Gary on a jumble a year ago. Very nice and friendly guy. I’ll contact him to get some decent linings, and work on the lever angle.
Cheers and thanks again
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium

Online Klaus

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Re: Ariel hub
« Reply #5 on: 14.12. 2017 06:12 »
Hi Morris,

you are unhappy with your brakes *conf*
New liners are showing no better results *eek*
Modern linings are mush more better than the older stuff.
Bad working breaks mostly have a wrong desing special the cams. The cams are symetrical and so the breakeshoes touch the drum as the same time.
Fakt is, the ongoing shoe does 80% of the breakeforce the offgoing shoe the last 20%
Have a good look at your breake and be shure that the on going shoe touch the drum first. Sometimes only a tourn over the cam give better results.
But its better to grind down the cam a litte unsymetrical so that the ongoing shoe lift first.
Its a good advice to mark the cam with a colored dot or so.
I am sure after this little maintenace, you will have a good stopper.

cheers Klaus


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Online Greybeard

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Re: Ariel hub
« Reply #6 on: 14.12. 2017 09:29 »
...I am sure after this little maintenace, you will have a good stopper.
Sounds like a very useful tip Klaus!

Offline morris

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Re: Ariel hub
« Reply #7 on: 14.12. 2017 19:06 »
Thanks for the tip Klaus.
The linings are pas their best so need to be changed anyway.
But I’ll do keep in mind your tip about the cam. Never thought about it that way.
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium