Here we have a Shimano BB-UN52, 68mm Shell Bottom Bracket with 111mm Square Taper Axle. The bottom bracket feels fine, not perfect as it’s used, but doesn’t feel gritty and turns fine.
Shimano UN55 68mm Shell English Thread Sealed Cartridge Taper Bottom Bracket
SHIMANO - Bottom Bracket BSA 122.5/68mm-BB-UN300 Square Taper (LL123)
SHIMANO Bottom Bracket BBR60-68mm English Thread, Black
SHIMANO Bottom Bracket Axle BSA 110mm/68mm
SHIMANO Bottom Bracket Axle BSA 118mm/68mm-BB-UN300 Square Carter
SHIMANO Bottom Bracket Axle BSA 122.5/68mm-BB-UN300 Square (D-NL)
