Brother BAS-415 - Lower shaft and rotary hook mechanism

~ Lower shaft and rotary hook mechanism
1) When the pulley 0 rotates in the direction of the arrow, it transmits the rotation to the upper shaft @.
The upper shaft@ then rotates upper shaft gear (A)@).
2) Upper shaft gear (A)@) transmits the movement to the lower shaft gear 0 via the vertical shaft e.
3) The lower shaft gear 0 transmits the rotation to the attached lower shaft @). Then the rotary hook 6,
attached to the lower shaft@), rotates in the direction of the arrow.
NOTE: In BAS- 411 and 415, the rotary hook makes two revolutions for each revolution made by the pulley.
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From the library of: Superior Sewing Machine & Supply LLC