Gearbox Primary Chain Adjuster Assembly (Stainless Steel)


Gearbox Primary Chain Adjuster Assembly (Stainless Steel)

Product no.: 0568 A2/314
£29.00
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To go with items 0566 and 0567, this is the gearbox adjuster assembly that fits through the upright frame gearbox casting for those Norton frames that fit an 'upright' style gearbox, and screws into the adjuster bolt (item 0566). The two small 1/4" BSC bolts then screw the retaining plate into the back of that frame casting, leaving the hex head at the end to be turned clockwise/anticlockwise which results in the gearbox being moved either forwards or backwards to correctly adjust the primary chain. All items in this set are manufactured from stainless steel, so will not rust. It is a very time consuming part to manufacture as the main bolt and its hex rear portion need to be manufactured as two seperate components (with the main bolt being made with threads at both ends). the hex end piece is also manufactured with an internal thread, but is also countersunk. Then once the plate is placed over the plain shaft, the hex portion is screwed on tight (with flux on the thread), the end of the shaft is then centre punched into the countersink, then finally braze is ran down the thread and the head. The head and faces of the hex are then cleaned and polished to provide a good finish and remove any traces of flux. The finished article is then as per original Sorry this is not a cheap item, but it is a very time consuming and expensive item to manufacture. Note: If you are unclear if your frame uses this type of assembly, the second photograph shows this assembly fitted to the gearbox casting of that chassis type - if your frame has the same casting on the main saddle down tube it is the correct type. Final point to note - because of the nature of the assembly (i.e. it has to be brazed after machining of the parts) the finish on the hex faces is functional rather than highly polished - but they are nicely cleaned and polished anway

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