Fibre clutch pack required - 850 mk2

[Flatspot]

I have received an electric start kit from CNW, and on stripping down my primary it is fitted with a sintered clutch plate pack. In discussions with Matt he has suggested I should obtain a complete Barnett fibre clutch pack.

does anyone know where I can obtain one here in the UK?

 

[Time Warp]

A maybe for a Commando.

Barnett Clutches and Cables

www.barnettclutches.com

Commando Clutch

Commando Clutch

www.rgmnorton.co.uk

 

[Fast Eddie]

That‘s a good list of U.K. Barnet dealers to try, I don’t think any are Norton folk though, so it’s a long shot.

Matt will get some out to you super quick if you ask him nicely.

Constant at hNw usually stocks them, but with Brexit you’d probably get them quicker from Colorado...

 

[Tornado]

I have received an electric start kit from CNW, and on stripping down my primary it is fitted with a sintered clutch plate pack. In discussions with Matt he has suggested I should obtain a complete Barnett fibre clutch pack.

does anyone know where I can obtain one here in the UK?

Why is fibre better than sintered for this belt conversion?

 

[gortnipper]

Wet vs dry.

Sintered Bronze Plate are rigid, temperature resistant and high strength bushings formed through the process of sintering, or powder metallurgy. .

Powdered metal parts have a proven record of unexcelled wear resistance and long life. They hold closer tolerances and can be made self-lubricating through oil impregnation. Because of smoother action and self-dampening features, powder metal assures a quiet operation.

The process of powder metallurgy has (3) basic steps:

1. First, the metal, in this case, bronze or bronze alloy, is made into a powdered form. This can be achieved by a number of methods including grinding, chemical decomposition and the most common atomization.
2. The metallic powder is then poured into a die or mold cavity and compacted under great pressure in order to adhere the particles. This occurs at room temperature.
3. The metal part is then inserted into a furnace where the extreme heat fuses the metal particles together to form a rigid, high strength and porous component. This part of the process is called sintering.

The resulting porosity of the sintered parts makes powder metal products especially useful in lubricating applications and as a result, bearings and wear plates are often fabricated from sintered bronze. Powdered metal offer both strength and flexibility. Additionally, they offer a cost effective production process that includes oil impregnation or permanent lubrication.

 

[YING]

I have received an electric start kit from CNW, and on stripping down my primary it is fitted with a sintered clutch plate pack. In discussions with Matt he has suggested I should obtain a complete Barnett fibre clutch pack.

does anyone know where I can obtain one here in the UK?

Racer,
You will be very pleased with that conversion once you are done.

 

[Tornado]

Wet vs dry.

Sintered Bronze Plate are rigid, temperature resistant and high strength bushings formed through the process of sintering, or powder metallurgy. .

Powdered metal parts have a proven record of unexcelled wear resistance and long life. They hold closer tolerances and can be made self-lubricating through oil impregnation. Because of smoother action and self-dampening features, powder metal assures a quiet operation.

The process of powder metallurgy has (3) basic steps:

1. First, the metal, in this case, bronze or bronze alloy, is made into a powdered form. This can be achieved by a number of methods including grinding, chemical decomposition and the most common atomization.
2. The metallic powder is then poured into a die or mold cavity and compacted under great pressure in order to adhere the particles. This occurs at room temperature.
3. The metal part is then inserted into a furnace where the extreme heat fuses the metal particles together to form a rigid, high strength and porous component. This part of the process is called sintering.

The resulting porosity of the sintered parts makes powder metal products especially useful in lubricating applications and as a result, bearings and wear plates are often fabricated from sintered bronze. Powdered metal offer both strength and flexibility. Additionally, they offer a cost effective production process that includes oil impregnation or permanent lubrication.

But isn't the stock clutch considered to not be a "wet" type? It is not immersed in oil as a modern bike clutch. Might get some splash but seems it is designed to fling this away from friction surfaces (the milled grooves in the plates). The fibre clutches are also good to run in the stock "wet" primary so they cannot be exclusively for dry setup ups.

 

[baz]

But isn't the stock clutch considered to not be a "wet" type? It is not immersed in oil as a modern bike clutch. Might get some splash but seems it is designed to fling this away from friction surfaces (the milled grooves in the plates). The fibre clutches are also good to run in the stock "wet" primary so they cannot be exclusively for dry setup ups.

You are lucky "belt driven man" is no longer with us !!!

 

[Flatspot]

Barnett clutch pack on it’s way from Matt @ CNW.

 

[gortnipper]

But isn't the stock clutch considered to not be a "wet" type? It is not immersed in oil as a modern bike clutch. Might get some splash but seems it is designed to fling this away from friction surfaces (the milled grooves in the plates). The fibre clutches are also good to run in the stock "wet" primary so they cannot be exclusively for dry setup ups.

My point wasn't that you couldn't run fiber plates (edit) wet, rather that the bronze plates need some lubrication to work correctly. IIRC, I think that the porosity is something like ~20% in a sintered bronze plate? If you run sintered plates (or bushes) completely dry, the soft bronze will not be "self-lubricating" any longer - it will end up lapping itself.