Overlock Sewing Machine

Overlock Sewing Machine is very first sewing machine made by brother and other manufacturers.  The sewing machine which is used for sewing edge or to join two or more fabric pieces by five or more threads is called over lock sewing machine. Usually this machine will cut the edges of the cloth as they are fed though some are made without machine cutters.

Function of Overlock Sewing Machine:

The functions of brother over lock sewing machine are given below.

• Over locks sewing machine makes an edge finish and sew seams of fabric.
• It cuts off the fabric for smooth edge for sewing with nancy sewing
• This sewing machine is suitable for sewing such as T-shirt, skirt, suit,  trousers etc
• This sewing machine suitable for diverse stitch as selectable options

Specifications of Brother Industrial Sewing Machine:

[label type=”label” title=”Specifications Name”]	[label type=”label” title=”Specifications Value”]
Category	Sewing
Machine Category	Sewing machine
Product Name	5 thread sewing machine
Product Model	According to Manufacturer
Product Class	New
Origin	China/India/Others
Brand/Manufacturer	Brother industrial sewing machine
Agent in Bangladesh	No/Yes
Power	220v/380v, 250W
Temperature	Normal
Certification	SGS/Others
Production Capacity	NA
Mechanical Configuration	Flat-Bed
Stitch Length	0-3mm
Feed Mechanism	Needle Feed
Weight	20KGS
Speed	6500rpm
Stitch Formation	Over  lock Stitch
Max. Sewing Thickness	5mm
Dimensions	60mm*20mm*40mm
Super high speed	5 thread
Description	Unique design,excellent performance,steady running,non-noise,longer usetime,aesthetic stitch,easier operation

Features of Brother Sewing Machines:

The features of brother sewing machines are given below.

• Brother sewing machines are suitable for over edging operation of thin, moderate and thick fabrics
• Brother sewing machines was equipped with automatic lubricating system
• Safety over lock machine is a combination of 3 threads over lock machine and 2 thread chain stitch
• This sewing machine has 1 thread and 2 loopers and works with 3 spools or cones of thread.
• Highest speed of over lock machine is up to 8500 rpm.
• Used for needles, 3 loopers and 5 cones of thread.
• It provides straight chain stitch plus an edge finish.
• Sewing machine repair facility
• It is similar of baby lock

Installation Procedure of Overlock Machine:

The machine should be connected correctly according to illustrations shown herewith. Fix the Secondary Board to the under face of machine table by Bolt and Nut. Rubber Cushion should be put into each hollow of Supporting Board.

Sewing Speed and Turning Direction of Pulley :

The highest sewing speed of this machine is shown in the table below. However, from the point of view durability it is preferred to function in the initial use of new machine at a speed of 20-25 that is lower than the highest speed for 200 hours approximately about one month.

Brother Sewing Machine Parts :

Brother sewing machine parts are listed below-

• Presser foot release
• Adjusting screw
• Tape Guide
• Eye guard
• Oil cap
• Thread guide
• Thread tension spring
• Belt cover
• Oil sight gauge
• Push button
• Front cover
• Model plate
• Indicate lamp
• Metering devices
• Roller
• Cylinder cover
• Presser footer
• Presser arm
• Differential lever

 Elastic Tap Feeder and Control Box – 

Brother sewing machine parts including elastic tap feeder and control box

Elastic Tap Feeder- 

• Tap spool bar
• Guide bar
• Switch lever
• Pole
• Clamp
• Main roller
• Sub roller

Control Box – 

• Display
• Function Switch
• Setting Switch
• Power Plug
• Power Switch
• Fuse Holder

Motor Pulley-

Use the Clutch Motor of 3 phase and bi-polar, 400 Watt  and V-Belt of Type M. The motor should be located making both center lines of Motor Pulley and Machine Pulley be aligned when the Motor Pulley shifts to the left by pedaling.

Lubrication for Overlock Machine:

Quality machine oil is recommendable as the lubricant.

Feeding OiI:

Because oil in machine have been drained completely at the shipment when it must be replenished with new oil without fail before the operation. The feeding should be made up to the upper one of 2 lines of Oil Sight Gauge(A) removing Oil Cap (D) marked OIL.  At the beginning use of brand new machine and the reuse of machine after long suspension of operation feed 2 or 3 drops of oil to Needle Bar(B) and Upper Looper Bar(C) without any fail.

Oil Gauge and Confirmation of Oil Flow:

Before the operation every day check the Oil Gauge regularly and replenish oil if the oil surface is below 2 lines. Oil Cap (D) should be tightened after the replenishment. At the beginning of operation confirm also that oil is flowing out of Oil Nozzle looking through Oil Cap (0).

Exchange of 0iI for Overlock Sewing Machine:

To have a long life of overlock sewing machine, after operation of about 250 hours the oil should be changed completely.

After that, the oil should be changed 2 or 3 times a year. Oil change should be made as follows.

1. Bring the machine head on the Table and
2. Drain oil and removing Drain Screw(E)
3. After draining, tighten the Drain Screw(E) again without fail
4. To replenish the new oil, refer to “Feeding Oil” (Item 5-2)

Check of Oil Filter and Exchange:

If the Oil Filter clogged with dust normal feeding of oil is impossible. Ordinarily, it is recommended to check the Filter every six months. In case of no oil comes out of Nozzle despite the oil reservoir is sufficient and in case of reservoir of oil is extremely little, check the machine.

To repair ad check the Filter of Overlock Sewing Machine remove Oil Filter Cap(G). If the Filter is clogged with dust, it must be renewed. You can read more about this machine from brother sewing machine manual of their official site

[1] Obaidur Rahman, B.Sc.in Textile Engineering, BTEC