JUKI MO-6716S Industrial Overlock Sewing Machine Review: Best 5-Thread Included

Product Description

The Juki MO-6714S is an industrial overlock sewing machine designed for overlock stitching on light to medium weight fabrics. Manufactured by Juki, a global leader in sewing quality and technology, this machine is built for speed, consistency, and reliability. It features two needles and four threads, making it ideal for creating professional overlock stitches. The machine is shipped on a skid or pallet beneath the assembled table, carefully packaged in a locked box or crate. Customers are responsible for the machine head installation in the table, motor belt/belt guard connection, and thread tree assembly with the supplied hardware.

Basic Information of the JUKI MO-6716S Industrial Overlock Sewing Machine

• Model: Juki MO-6714S
• Type: Industrial Overlock Sewing Machine
• Manufacturer: Juki (Made in Japan)
• Weight: 28 kg (Machine Head)
• Power: 110V with a servo motor
• Warranty: 90 days labor on defects in materials and workmanship (US), 30 days parts and labor (Non-US)

Key Features Of the JUKI MO-6716S Overlock Machine

Advanced Sewing Capabilities

• Two Needles and Four Threads: Designed exclusively for overlock stitching, providing strong and durable seams.
• Differential Feed: Allows the machine to handle a variety of fabric types, from stiff to elastic, ensuring smooth and even seams.
• High Sewing Speed: Capable of sewing at a maximum speed of 7,000 stitches per minute, increasing productivity.

Performance and Efficiency

• Maximum Stitch Length: 1.5–4 mm
• Overedging Width: 3.2, 4.0, 4.8, 6.4 mm
• Differential Ratio: 1:0.7 to 1:2.0, allowing for precise adjustments based on fabric type.
• Needle Bar Stroke: 24.5 mm
• Needle Inclination Angle: 20°
• Maximum Presser Foot Lift: ~7 mm
• Maximum Presser Foot Pressure: 6.5 kgf or 63.7 N

User-Friendly Design

• Servo Motor: Provides adjustable speed control and operates quietly, making it ideal for in-home use.
• Fully Assembled Table: Comes with a fully assembled table, reducing setup time and effort.
• Cooling Fan and Oil Filter: Equipped with a cooling fan and cartridge-style oil filter for increased reliability and durability.

Durability and Maintenance

• Upper and Lower Needle Bar Bushings: Recently implemented to increase the longevity and dependability of the needle bar unit.
• Centralized Oil Wick Lubrication: Ensures consistent lubrication of the hook and other critical components, reducing maintenance time and effort.
• Replaceable Components: Parts designed for conventional Japanese machines are interchangeable, eliminating the need for extra machining and reducing additional costs.

JUKI MO-6716S Industrial Machine: Performance

The Juki MO-6714S excels in creating high-quality overlock stitches on light to medium weight fabrics. Its advanced feed mechanisms and high sewing speed ensure consistent seam quality and prevent stitch gathering, even on multi-layered materials. The machine’s differential feed capabilities allow it to handle a variety of fabric types, from stiff to elastic, ensuring smooth and even seams.

Stitch Quality

• Consistent Seam Quality: The differential feed mechanism ensures well-tensed seams without pitch errors.
• Adjustable Stitch Length and Width: Provides versatility for different sewing applications.

Ease of Use

• User-Friendly Interface: The machine’s design includes features like an easy-to-observe needle area and a large handwheel for enhanced operability.
• Quick Bobbin Preparation: The vertical-axis double-capacity hook reduces the frequency of bobbin thread changes, increasing efficiency.

Included Components

• Machine Head: Juki MO-6714S
• Table and Stand: Fully assembled and ready to use.
• Servo Motor: Provides adjustable speed control and quiet operation.
• Sewing Light: Enhances visibility in the sewing area.
• Drawer: For convenient storage of accessories and tools.

Motor Options of the Juki MO-6716S Industrial Overlock Sewing Machine

The Juki MO-6716S is a high-speed industrial overlock sewing machine designed for various sewing materials and processes. It offers flexibility in motor options, allowing users to choose between clutch motors and servo motors based on their specific needs. Here’s a detailed look at the motor options available for the Juki MO-6716S:

1. Clutch Motors

Clutch motors are traditional motors commonly used in industrial sewing machines. They operate at a fixed speed and are known for their durability and reliability.

Features of the Clutch Motors

• Fixed Speed: Typically operate between 1725 to 3450 rpm, depending on the type of machine.
• Constant Operation: The motor runs continuously when the machine is turned on, even when the pedal is not engaged.
• Durability: Known for their robust construction and long lifespan.

Clutch Motors: Advantages

• High Power: Suitable for heavy-duty sewing tasks that require consistent power.
• Cost-Effective: Generally less expensive than servo motors.

Clutch Motors: Disadvantages

• Noise: Clutch motors are noisier compared to servo motors, which can be a drawback in quieter work environments.
• Energy Consumption: Consume more energy as they run continuously, even when not actively sewing.
• Lack of Speed Control: Fixed speed operation means less control over the sewing speed, which can be challenging for beginners or precision sewing tasks.

2. Servo Motors

Servo motors are modern, electronically controlled motors that offer adjustable speed settings and energy efficiency. They are becoming increasingly popular in industrial sewing applications.

Features Of The Servo Motors

• Adjustable Speed: Allows for precise control over the sewing speed, making it suitable for various sewing tasks.
• Silent Operation: The motor is completely silent when the pedal is not engaged, reducing noise in the work environment.
• Energy Efficiency: Consumes up to 90% less energy compared to clutch motors.

Servo Motors: Advantages

• Speed Control: The ability to adjust the motor’s speed makes it easier to control the sewing machine, especially for beginners and for tasks that require precision.
• Energy Savings: Significant reduction in energy consumption, leading to lower operating costs.
• Lightweight: Typically one-third the weight of clutch motors, making them easier to handle and install.
• Reverse Motor Rotation: Can easily reverse the motor rotation with the flick of a switch.
• Consistency: The adjusted speed remains the same regardless of how hard the pedal is pressed.

Servo Motors: Disadvantages

• Higher Initial Cost: Generally more expensive than clutch motors, but the energy savings can offset the initial investment over time.
• Complexity: May require more understanding of electronic controls and settings.

Included Accessories of the Juki MO-6716S Industrial Overlock Sewing Machine

The Juki MO-6716S is a high-speed industrial overlock sewing machine designed to handle a variety of sewing materials and processes. It comes with a comprehensive set of accessories to ensure you have everything you need to start sewing right away. Here is a detailed list of the included accessories:

Machine Components

1. Machine Head: Juki MO-6716S
2. Table and Stand: Fully assembled and ready to use.
3. Servo Motor: Provides adjustable speed control and quiet operation.
4. Sewing Light: Enhances visibility in the sewing area.
5. Drawer: For convenient storage of accessories and tools.

Presser Feet

1. Standard Presser Foot: For general overlock stitching tasks.
2. Specialty Presser Feet: Depending on the specific model and configuration, additional presser feet may be included for specialized tasks.

General Accessories

1. Bobbin Winder: Located on the front face of the machine arm for easy access.
2. Large Handwheel: Enhances control and ease of use.
3. Knee-Lifter Mechanism: Built into the bed, reducing the pressure required to operate and facilitating setup.
4. Safety Clutch: Prevents hook damage by automatically engaging if the thread gets caught, with a reset button to return the machine to normal operation.

Maintenance Tools

1. Screwdriver: For maintenance and adjustments.
2. Lint Brush: For cleaning the machine and removing lint.
3. Oil: Juki New Defrix Oil No. 2 (equivalent to ISO VG32) for lubrication.

Additional Features

1. Vertical-Axis Double-Capacity Hook: Reduces the frequency of bobbin thread replacement, increasing efficiency.
2. Centralized Oil Wick Lubrication: Ensures consistent lubrication of the hook and other critical components, reducing maintenance time and effort.
3. Cooling Fan and Oil Filter: Equipped with a cooling fan and cartridge-style oil filter for increased reliability and durability.

Needles and Bobbins

1. Needles: DCx27 (except for certain subclass models).
2. Bobbins: large-capacity bobbins suitable for high-speed sewing.

Documentation

1. Instruction Manual: A detailed guide for operating the machine.
2. Parts List Manual: For easy identification and ordering of replacement parts.

Specifications of the Juki MO-6716S Industrial Overlock Sewing Machine

Specification	Details
Model	Juki MO-6716S
Type	Industrial Overlock Sewing Machine
Manufacturer	Juki (Made in Japan)
Weight	28 kg (Machine Head)
Power	110V with servo motor
Maximum Sewing Speed	7,000 stitches per minute
Stitch Length	1.5–4 mm
Overedging Width	3.2, 4.0, 4.8, 6.4 mm
Differential Ratio	1:0.7 to 1:2.0
Needle Bar Stroke	24.5 mm
Needle Inclination Angle	20°
Maximum Presser Foot Lift	~7 mm
Maximum Presser Foot Pressure	6.5 kgf or 63.7 N
Needle System	DCx27 (except for certain subclass models)
Lubrication	Automatic lubricating oil (ISO VG18 equivalent)
Cooling System	Equipped with cooling fan and cartridge-style oil filter
Feed Mechanism	Differential feed
Stitch Type	Overlock (Safety Stitch Type 516)
Machine Head Weight	28 kg
Presser Foot Lift Mechanism	Knee-lifter mechanism
Thread Take-Up Mechanism	Dual needle-thread take-up and looper thread take-up
Motor Options	Clutch motor or servo motor

Tips for Lubricating the Juki MO-6716S Industrial Overlock Machine

Proper lubrication is essential to maintaining the smooth operation and longevity of your Juki MO-6716S industrial overlock sewing machine. Here are some detailed tips to help you lubricate your machine effectively:

1. Gather Necessary Supplies

Before you start, make sure you have the following items:

• Juki New Defrix Oil No. 2 (equivalent to ISO VG32)
• Lint brush
• Soft cloth
• Screwdriver (if needed to access certain parts)

2. Turn Off and Unplug the Machine

Safety first! Ensure the sewing machine is turned off and unplugged from the power source to prevent any accidents.

3. Clean the Machine

• Remove Lint and Dust: Use a lint brush to clean out any lint, dust, or fabric scraps from the bobbin area, feed dogs, and other accessible parts. This ensures that the oil can reach the necessary components without obstruction.
• Wipe Down the Exterior: Use a soft cloth to wipe down the exterior of the machine, removing any dust or residue.

4. Locate the Lubrication Points

Refer to the Juki MO-6716S user manual to identify the specific points that require lubrication. Common areas include:

• Hook and Bobbin Area: The vertical-axis double-capacity hook and bobbin case.
• Needle Bar: The area where the needle bar moves up and down.
• Presser Foot Bar: The area where the presser foot bar moves.
• Moving Parts Inside the Machine: Accessible by removing the machine’s cover.

5. Apply Sewing Machine Oil

• Use Sparingly: Apply a drop or two of Juki New Defrix Oil No. 2 to each lubrication point. Avoid over-oiling, as excess oil can attract dust and lint.
• Hook and Bobbin Area: Place a drop of oil on the hook race where the bobbin case sits. Rotate the handwheel to distribute the oil evenly.
• Needle Bar and Presser Foot Bar: Apply a drop of oil to the needle bar and presser foot bar. Move the needle up and down to ensure the oil spreads evenly.
• Internal Moving Parts: If you have access to the internal moving parts, apply a drop of oil to each point as specified in the manual.

6. Reassemble the Machine

If you had to remove any covers or parts to access the lubrication points, carefully reassemble the machine. Ensure all screws are tightened securely.

7. Run the Machine

• Test Run: Plug the machine back in and turn it on. Run the machine at a slow speed for a few minutes to allow the oil to distribute evenly across the moving parts.
• Check for Excess Oil: After running the machine, check for any excess oil that may have seeped out. Wipe it away with a soft cloth to prevent it from staining your fabric.

8. Regular Maintenance Schedule

• Frequency: Lubricate your Juki MO-6716S sewing machine regularly, depending on how often you use it. For frequent use, lubricate every few months. For occasional use, lubricate every six months.
• Professional Servicing: Consider taking your machine for professional servicing once a year to ensure it remains in optimal condition.

Pros and Cons of the Juki MO-6716S Industrial Overlock Machine

Pros

• High Sewing Speed: Capable of sewing at a maximum speed of 7,000 stitches per minute, significantly increasing productivity.
• Differential Feed: Allows for precise adjustments, ensuring smooth and even seams on a variety of fabric types, from stiff to elastic.
• Consistent Seam Quality: The machine produces well-tensed, soft-feeling seams that flexibly correspond to the elasticity of the material, even at high speeds.
• Advanced Thread Take-Up Mechanisms: Dual needle-thread take-up and looper thread take-up mechanisms provide improved responsiveness when sewing materials ranging from light to heavy weight.
• High Reliability: The needle bar unit’s longevity and dependability are increased by the upper and lower needle bar bushings.
• Cooling System: Equipped with a cooling fan and cartridge-style oil filter for increased reliability and durability.
• Replaceable Components: Parts designed for conventional Japanese machines are interchangeable, eliminating the need for extra machining and reducing additional costs.
• Servo Motor: Provides adjustable speed control and operates quietly, making it ideal for in-home use.
• Fully Assembled Table: Comes with a fully assembled table, reducing setup time and effort.
• Micro-Adjustment Mechanisms: External adjustment mechanism and differential-feed micro-adjustment mechanism allow for easy adjustments to match the material being used.
• Wide Needle Entry Area: Improved operator operability with a wider area surrounding the needle entry.
• Reduced Noise and Vibration: The machine is designed to reduce operating noise and vibration, ensuring a comfortable working environment.
• Energy Efficiency: Servo motors consume up to 90% less energy compared to clutch motors, leading to lower operating costs.
• High Presser Foot Lift: Maximum presser foot lift of ~7 mm allows for easy handling of thick materials.

Cons

• Expensive: Higher initial investment compared to standard home sewing machines, which may be a consideration for budget-conscious buyers.
• Industrial-Grade: As an industrial machine, it may have a steeper learning curve for beginners or those accustomed to domestic sewing machines.
• Manual Adjustments: Requires manual adjustments for optimal performance, which may be challenging for inexperienced users.
• Heavy: Weighs 28 kg (machine head), making it less portable and not ideal for frequent transport. It is designed for a dedicated sewing space.
• Limited to Overlock Stitches: Designed exclusively for overlock stitching, which may limit its versatility for users who need a machine capable of multiple stitch types.

Conclusion

The Juki MO-6716S industrial overlock sewing machine offers numerous advantages, including exceptional performance with a wide range of fabrics, high sewing speed, consistent seam quality, and advanced features like differential feed and servo motor. Its robust construction and user-friendly design make it a reliable choice for industrial sewing applications. However, the higher cost, complexity, and specialization may be considerations for some users. Overall, the Juki MO-6716S is an excellent investment for those needing a powerful and durable machine for high-speed overlock stitching tasks.

FAQs About the Juki MO-6716S Industrial Overlock Machine

1. What is the Juki MO-6716S sewing machine?

The Juki MO-6716S is a high-speed industrial overlock sewing machine designed for a variety of sewing materials and processes. It is ideal for creating overlock stitches on light to medium weight fabrics.

2. Where is the Juki MO-6716S manufactured?

The Juki MO-6716S is manufactured in Japan by Juki, a global leader in sewing quality and technology.

3. What types of fabrics can the Juki MO-6716S handle?

The Juki MO-6716S can handle a wide range of fabrics, including:

• Light to medium weight fabrics
• Stiff fabrics
• Elastic fabrics

4. What is the maximum sewing speed of the Juki MO-6716S?

The Juki MO-6716S can sew at a maximum speed of 7,000 stitches per minute.

5. What is the differential feed ratio of the Juki MO-6716S?

The differential feed ratio ranges from 1:0.7 to 1:2.0, allowing for precise adjustments based on fabric type.

6. What is the maximum stitch length of the Juki MO-6716S?

The maximum stitch length of the Juki MO-6716S is 4 mm.

7. What is the overedging width of the Juki MO-6716S?

The overedging width can be adjusted to 3.2, 4.0, 4.8, or 6.4 mm.

8. Does the Juki MO-6716S have a differential feed mechanism?

Yes, the Juki MO-6716S is equipped with a differential feed mechanism, which allows for smooth and even seams on various fabric types.

9. How is the Juki MO-6716S lubricated?

The Juki MO-6716S uses automatic lubricating oil (equivalent to ISO VG18) to ensure consistent lubrication of the hook and other critical components.

10. Does the Juki MO-6716S have a cooling system?

Yes, the machine is equipped with a cooling fan and cartridge-style oil filter for increased reliability and durability.

11. Are the components of the Juki MO-6716S replaceable?

Yes, parts designed for conventional Japanese machines are interchangeable, eliminating the need for extra machining and reducing additional costs.

12. What components are included with the Juki MO-6716S?

The Juki MO-6716S comes as a complete unit, including:

• Machine head
• Fully assembled table
• Servo motor
• Sewing light
• Drawer

13. What type of motor does the Juki MO-6716S use?

The Juki MO-6716S is equipped with a servo motor, which provides adjustable speed control and operates quietly.

14. Is the Juki MO-6716S suitable for beginners?

While the Juki MO-6716S is designed for industrial use and may have a steeper learning curve for beginners, it is user-friendly and offers features like differential feed and adjustable stitch length that enhance operability.

15. How noisy is the Juki MO-6716S?

The machine operates quietly, especially with the servo motor, which is quieter than traditional clutch motors. However, some noise is still produced, particularly at high speeds.

16. Where can I buy the Juki MO-6716S sewing machine?

The Juki MO-6716S can be purchased from authorized Juki dealers, online retailers, and specialty sewing stores. It is recommended to buy from reputable sources to ensure you receive the full warranty and customer support.

17. What is the warranty on the Juki MO-6716S?

The Juki MO-6716S comes with a 90-day labor warranty on defects in materials and workmanship for US customers. For non-US customers, the warranty is 30 days for parts and labor.

All Used Image Credit: JukiIndustrial.Co.Uk