G'day folks,

I'd say #61 is the outer-mounted drive gear for the landroll clutch, and #159 is the reel drive sprocket here.

It makes sense for that drive gear to be keyed to the shaft, with one of the #62 woodruff keys.

As far as I can work this out, the reel clutch drum/sprocket assembly is free-running on the countershaft, located axially by the drive gear #61, and clutch backing plate #206 [which is also keyed to the countershaft], with thrust washers #160 and #161.

Pic #2 in post #70008 back on Page 1 has a reasonable detail view of the sprocket, if it's enlarged a bit. This confirms the large diameter centre hole in the sprocket, an indication that it is most likely screwed on. SB doesn't seem to have favoured splines.

As it happens, we do know the reel drive sprocket is screwed onto the hub extension of the clutch drum, from a past poster who found out the expensive way blush ; https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=61229

I'd expect this to have a RH thread, i.e. the opposite to the driven sprocket on the reel.

Hopefully one of the past posters with hands-on experience of the Supercut teardown will chime in!

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."