Fixed Knot Machine

The South Fence Machinery Fixed Knot machines have been developed from the company’s extensive experience of more than 85 years in the manufacture of wire fence products and wire fence manufacturing machinery.

This knot is used widely in the North American market and is known for its robust structure and versatility. It features a tightly wrapped t-shaped knot that eliminates any vertical or horizontal knot movement.

Due to the complexity of the knot tying process, there have been many machines designed around the same concept, however the core of the Fixed Knot machine remains largely unchanged for 115 years. This stands as a tribute to the original pioneers of the industry. South Fence Machinery continues this legacy, focusing our efforts on ensuring the knot tying process is reliable and consistent to produce a quality product ready to meet any market demand.

Learn more about the product and machine below, contact our team for quotes and further information.

Check out our new Take-up Optimisation Options, click here to learn more!

Knot Benefits

  • The utilisation of a longer knot-wire improves the surface contact area of the knot, reducing the chance of slippage.

  • Knot-wire is pre-tensioned during the wrapping process, resulting in improved crimp securing as the wire is drawn towards the knot’s centre.

  • Tidy tail finishing position remains in line with the helix of the wrap, reducing exposed sharp edges.

Fence Benefits

  • Alternating Line-wire tension crimp ensures balanced tensioning of the fence during straining as well as temperature and terrain variation.

  • Centre twist capable, allowing for a section of the fence to be hinged. This opens applications in the fence industry for predator and pest exclusion.

  • A variety of roll end conditions are available such as extended ends, marker beat, and pre- stripped ends. This eliminates unnecessary steps during the fence erection process, speeding up fencing time and reducing installer fatigue.

  • The fence wire’s tensile and wire gauge can be mixed and matched to suit market expectations.

Our Fixed Knot fencing machines support all the features and functionality expected on any modern manufacturing machine:

  • The Human Machine Interface (HMI) screens facilitate easy setting and adjustment of the machine during operation as well as displaying real time manufacturing information and machine status.

  • The direct stay-wire feed system gives versatility of fence specifications and clear uninterrupted operator vision of the knotting boxes. Line-wires can be added or dropped off at the top or bottom of the fence to overcome the necessity of shifting the knotting boxes.

  • The servo-driven indexing crimping drum facilitates the effortless change of stay-wire spacing's at the push of a button, eliminating long down times during specification changes.

  • The finished fence is wound on to a variable torque roll wind up system that automatically adjusts throughout the manufacturing process to ensure a compact roll is produced for ease of handling and shipping.

  • The finished roll is automatically stripped from the mandrel by the stripping system to minimize employee handling and fatigue.


All machines are backed by South Fence Machinery’s comprehensive warranty and after sales support to ensure your peace of mind.

The Fixed Knot machine has a full complement of safety systems to ensure your operator's safety. A full and comprehensive risk assessment is conducted on all South Fence machines in line with international safety regulations and CE compliancy. 

Machine Safety Features:

  • Monitored Light Curtains on both the front and rear of the machine

  • Monitored RFID Interlock switches on all removable guards and doors

  • Area Scanners to detect workers operating in hazardous zones

  • Siemens safety PLC to monitor all safety related control features

  • 2mm punch panel guard system finished in a durable powder coat

  • Festo pneumatic safety valves and regulators

  • Comprehensive machine warning signage

  • Non-slip operator platforms with hand rails and kick boards

  • HMI operator fault banner system

  • Safe speed monitoring of all axes for machine set-up and fault finding

  • Acoustic insulation on machine guards to reduce machine noise


Compliance Standards:

ISO 12100:2010

General Principles for Design – Risk assessment and reduction

ISO 13857:2008

Safety Distance to prevent hazard zones being reached by upper and lower limbs

ISO 13855:2010

Positioning of safeguards with respect to the approach speed of parts of the human body

ISO 13850:2015

Emergency stop function – Principles of Design

ISO 13849-1:2015

Safety-related parts of control systems – General principles for design

ISO 13849-2:2012

Safety-related parts of control systems - Validation

EN 60204-1:2006 + A1:2009

Electrical equipment of machines – General requirements

EN 62061:2015

Safety of machinery - Functional safety of electrical, electronic and programmable electronic control systems

AS 4024.1-2014

Safety of Machinery

AS 1657-2013

Fixed platforms, walkways, stairways and ladders – Design, construction and installation

AS 1554.3:2014

Structural steel welding – Welding of reinforcing steel

  FKM 27-4D FKM 30-4D FKM 31-4D
Maximum Fence Height (Single)




Maximum Fence Height (Dual)




Maximum Machine Speed 50 cycles per minute
Maximum Number of Horizontal Wires

26 Line for a single fence

28 Line for a dual fence

Horizontal Wire Spacing

Minimum 3" (75mm)

Maximum 12" (300mm)

1/2" (12.5mm) spacing increments

Vertical Wire Spacing

3", 6", 9", 12", 18", 20", 24", 36", 48" 

(75mm, 150mm, 225mm, 300mm,

450mm, 500mm, 600mm, 900mm, 1200mm)

Horizontal Wire Size & Tensile

2.44mm-2.56mm* (Intermediate)

2.44-3.50mm* (Selvedge)

900 - 1390 MPa

Vertical Wire Size & Tensile


500 - 900 MPa

Knot Wire Size & Tensile


400 - 525 MPa

Maximum Roll Length 500m (1640ft)*
Maximum Roll Diameter 800mm (31.5")*
Motion System Controlled Siemens Servo Drives
Dual Feed System To enable 2 rolls to be manufactured together
Safety Equipment Utilised

Fixed Guards

CAT4 RFID Removable Guards

CAT4 Light Curtains

CAT3 Area Scanners

Centre Twist Available on request
Automatic Label Inserters Available on request
Take-up Optimisation Options  Available on request
Light Wire Gauge Tooling (2.00mm kit) Available on request
Heavy Wire Gauge Tooling   (3.15mm kit)  Available on request
Automatic Lubrication System Automatic machine lubrication pump, additional lubrication options available on request
Approximate Floor Area Required 22m x 13m (72ft x 43ft)

* Variation to the specifications are available on request.

All weights and measures are approximate.

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