Singer 471U - (C Mechanisms 1); T| Needle Bar Mechanism; Rotary Hook Mechanism I; B Cutter Mechanism

( MECHANISMS ))
[T] Needle bar mechanism
&
When the pulley O rotates in the direction of the arrow, this movement is transmitted to the thread take-up
crank O fixed on the end of the upper shaft O-
The needle bar crank O is fixed to the thread take-up crank O, andan up-down motion is transmitted tothe
needle bar clamp O through the needle bar crank rod 0.
The needle barO is fixed to the needle bar clamp 0 and is guided by the vertical bushing on the needle bar
support 0 so that is moves smoothly up and down.
[T] Rotary hook mechanism
0
0
0
0
0
1. When the pulley 0 rotatesinthedirection ofthearrow,this movement istransmitted tothetiming pulley U0
fixed on the upper shaft 0.
2. The timing belt0 is wrapped around the timing pulley U 0 and assures sure transmission of the rotating
movement of the upper shaft to the timing pulley D 0.
3. The timing pulley D 0 is fixed to thelowershaft0 and transmitstherotating movement tothelowershaftgear
0 fixed to the end of the lower shaft 0.
4. The rotary hook shaft gear 0 mesheswith the lowershaft gear 0, and therotating movementistransmitted to
the rotary hook shaft 0.
5. The rotating hook assembly 0 is fixed on the rotary hook shaft 0 and rotates completely.
- 1 -
From the library of: Superior Sewing Machine & Supply LLC