Brother S-710A - Mechanical Descriptions; 4-1. Upper Shaft and Needle Bar Mechanism; 4-2. Lower Shaft and Rotary Hook Mechanism

4. MECHANICAL DESCRIPTIONS
SL-710A
5
4. MECHANICAL DESCRIPTIONS
The mechanisms operate in the order of the numbers given in the illustrations.
4-1. Upper shaft and needle bar mechanism
4-2. Lower shaft and rotary hook mechanism
1627M
8 Lower shaft gear
7 Lower shaft
3 Join
t
4 Timing pulley U
2 Roto
r
1 Pulle
y
6 Timin
g
pulle
y
D
5 Timing bel
t
9 Gea
r
10 Rotary hook shaft ass
y
11 Rotary hook
1626M
5 Needle take-up leve
r
4 Thread take-up crank
3 Upper shaf
t
2 Rotor
1 Pulle
y
7 Slide bloc
k
8 Needle ba
r
(1)
(2)
6
Needle bar
clamp
The needle bar is guided by the needle bar bush U (1) and needle bar bush D (2).