H: Hubs, Wheels and Tyres H57 Black Lightning Sprocket Adapter

[Keith Martin]

Looking for the details of a H57 adapter that is used when running sprocket only on the drive side.

 

[vibrac]

Go measure a brake hub because all the major external dimensions have to be the same, then just join the dots. well that what I did. Look out for a hell of a lot of swarfe from the alloy blank!

 

[bmetcalf]

With no backing plate, the cover for the wheel bearing would be a factor also for the adapter and the sprocket ID.

 

[andrew peters]

With no backing plate, the cover for the wheel bearing would be a factor also for the adapter and the sprocket ID.

with the amount of machining involved then I think your advice is the least of their problems ... haha, Sorry Bruce, that just came to mind...

 

[Bill Thomas]

"D" s had only one rear brake, So covered the bearing the other side with alloy Thingy .

 

[Cyborg]

Alloy thingy of my own design because I didn’t know D’s used one. For the rest of the dimensions, I just took them off a drum and sprocket. You want the thingy to be large enough in diameter so you can remove the bearing at a later to repack it without disturbing the sprocket carrier.

 

[Bill Thomas]

Like this.
Don't know if they have changed it , But mine was a nice alloy one like Cyborg's.

 

[Marcus Bowden]

Bill my handsome, that looks like an ordinary brake drum and sprocket. From an MO drawing

 

[Bill Thomas]

Sorry Marcus , Just saying to Bruce about covering the bearing when no drum is fitted.
All The Best, Bill.

 

[davidd]

Information is hard to find as the adaptor appeared only on a few Lightnings. The Singapore Lightning and the Joe Simpson Lightning, maybe?

Most Lightnings had brake drums.

David