Outline; Features; Specifications; Application - JUKI DLN-6390 Engineer's Manual

1. OUTLINE

(1) Features

1) The machine incorporates the mechanical horizontal thread trimming system that has achieved with JUKI lockstitch
machines and the thread trimming performance has improved as com pared with the conventional models.
2) The forced lubrication system of JUKI lockstitch machine system is incorporated in the face plate section and the hook,
and the reliability is improved by stable lubrication. In addition, the forced lubrication mechanism by the plunger pump
is equipped to the face plate section and the hook section, and oil leakage is prevented at the time of sewing.
3) In order to improve the sewing environment and to reduce the operator's burden, vibration and noise at the time of
sewing are reduced as compared with the conventional machines.
4) Scales are added to the respective adjustment sections of thread tension knob, presser spring regulator, etc., and
simplification of adjustment work is considered as well.
5) For the roller feed mechanism, the structure of the conventional machine which is highly appreciated in the market has
been succeeded, and the smooth feed at step section has been realized.
6) Common use of presser foot, roller, hemming binder, pitch changeover gear, etc. with the conventional machines is
attempted, and the exchangeability of gauges is secured.
7) A thread trimming blow device is equipped as standard and thread trimming failure due to the thread trimming section
clogged with dust is prevented.
8) The stepless dial adjustment system is incorporated for the adjustment of needle feed amounts, and the needle feed
amounts can be adjusted without using tools.
9) Workability in the process of sewing thick denim or multi-layered sections is improved since the needle bar stroke is 35
mm and max. 14 mm of the lift of the roller is secured.

(2) Specifications

No.
Item

Application

1
Max. sewing speed
2
3 Stitch pitch
Needle
4
Needle bar stroke
5
Thread take-up stroke
6
Hook
7
Lift of presser foot
8
(Throat plate to bottom surface
of presser foot)
9
Feed method
Hemmer opener type
10
11 Lubrication oil
Stitch length adjusting method
12
13
Needle clamp method
Motor
14
(3) Application
1) The machine comes standard with the binder of rolled hemming width of 1/2" for jeans at the time of
delivery. However, the machine can be used for the broad range of materials such as chinos, corduroy,
etc. by replacing optional binder (1"), presser foot (3/8", 1") and upper/lower rollers.
2) An edge guide is supplied with the machine as standard accessory and it is possible to sew lining.
Model
DLN-6390
Bottom hemming, waist band attaching (lockstitch type), hemming
(lockstitch type)
When stitch length is less than 3.6 mm : 5,000 rpm
When stitch length is not less than 3.6 mm : 4,500 rpm
2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, 3.2 mm (standard), 3.6 mm, 4.2 mm
SCHMETZ UY180GVS Standard Nm140 (shank diameter ø1.84)
Range of use : Nm75 to Nm150 (equivalent to #11 to #22.5)
Exclusive automatic lubricating full-rotary 1.7 fold hook (standard hook
can be used.)
Knee lifter (by manual) : 12.5 mm
Upper/lower roller continuous feed method
By manual
New Defrix Oil No. 1 (equivalent to ISO VG7)
400W or higher power clutch motor
can be used.
1
DLN-6390-7
35mm
123mm
Presser lifting lever : 4.5 mm
Auto-lifter : 12.5 mm
Air cylinder drive
Gear replacement method
Nut clamp method
SC-380