JUKI DDL-552-2 User Manual

3. Limit of low-speed rotation of the machine
For trimming the thread, the limit of low-speed rotation should be as follows:
For cotton thread Under 150 s.p.m.
For synthetic thread Under 120 s.p.m.
1) With Hitachi, NATIONAL motor, when the high-speed rotation revolution number is
determined, the low-speed revolution number is also set. Following table shows the relation between
the size of the motor pulley with the high and low speed rotational number of revolution of the
machine:
Outer dia. of motor
pulley
125.5mm
116.5mm 105mm
95.5mm
90.5mm 81.0mm
76.0mm
50 cycle
High speed rotation
s.p.m.
5060 4630
4250
3820
3610
3390
Low speed
Hitachi
NATIONAL
s.p.m.
230 210
193
175 160
155
_9}
"o
High speed
5040 4540
4320 3790
3520
>,
u
o .
vo
' Low speed
Hitachi
NATIONAL
228 206 193 173 160
4. Length of the belt
The length of the belt is shown in the table below:
Motor pulley
Outer dia.
mm
125.5
116.5 95.5 90.5
81.0
76.0
Length of belt
For Hitachi
Motors
43"
42" 42" 42"
41"
41"
*Note: Put on the belt before connecting the cord which is coming out from behind the hand
wheel.
5. Installing the control box
Install the control box to the position as shown in the
table dimentional diagram and tighten it with the screw as
shown in Fig. 3.
' *Be sure to insert a rubber cushion, otherwise the
movements of all electrical components will be impaired by
vibration of the running machine.
. "1-
6. Installing the machine head
Fig. 3
The method of installing the machine head, oil reservoir, spool stand and the bobbin winder to
the table is exactly identical with that of any conventional lockstitching machine.
- 3 -
From the library of: Superior Sewing Machine & Supply LLC

JUKI DDL-552-2 Specifications

General

Brand	JUKI
Model	DDL-552-2
Category	Sewing Machine
Language	English