Stiff Stay Machine

The South Fence Machinery Stiff Stay 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.

The Stiff Stay knot was initially designed for the North American horse fence market, then known as the Square Deal or "S" knot. This knot features a distinctive smooth, strong knot that utilises 75% less knot wire when compared to the Fixed Knot. This design ensures an economic and robust knot that cannot damage the animal’s pelt.

The Stiff Stay machine utilises South Fence Machinery’s patented knot forging system rather than other wrapping methods. This ensures a compact knot is produced every time without compromising fence strength and integrity.

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 forging process guarantees the knot-wire is pressed and locked into position underneath the stay-wire, hiding the ends, and ensuring no exposed sharp edges. This makes the knot especially suitable for the safe retention of valuable stock as pelts or hides cannot be damaged.

  • The Stiff Stay knot is square rather than rectangular, ensuring the line and stay-wire are evenly secured in place.

  • The Stiff Stay knot economically utilises 75% less knot-wire than its Fixed Knot counterpart.

  • The knot-wire is cut at a 45-degree angle, utilising less knot-wire with no sharp edges when compared to other knots cut at 90 degrees.

  • Wire coating damage is kept to a minimum during the forging process with the help of specialised engineered tooling.

Fence Benefits

  • Triple wrap end-wraps to mitigate slippage and improve fence integrity.

  • 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.

  • Small mesh apertures down to 50mm x 50mm for enhanced exclusion.

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

  • The compact form of the knot allows for better straining during terrain undulation as the fence contours more readily.

Our Stiff Stay 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.

  • Stay-wire accumulators coupled with the innovative Tri-drive feed unit ensures rapid and accurate stay-wire delivery directly into the knot forging system.

  • 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 minimise 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 Stiff Stay 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

SSM Specifications
Maximum Fence Height 2.6 metres (102")*
Maximum Number of Horizontal Wires 25 Line for a single fence
26 Line for a dual fence
Horizontal Wire Spacing Minimum 50mm (2") with 25mm (1") increments
Vertical Wire Spacing 50mm, 75mm, 100mm, 150mm, 225mm and 300mm
(2", 3", 4", 6", 9" and 12")*
Horizontal Wire Diameter 2.50mm*
Vertical Wire Diameter 2.50mm*
Knot Wire Diameter 2.50mm*
Maximum Machine Speed Up to 100 cycles per minute
Maximum Roll Length 500m (1640ft)*
Maximum Roll Diameter 800mm (31.5")*
Motion System Controlled Siemens Servo Drive
Dual Feed System To enable 2 rolls to be manufactured together (2.4m or 96"* usable width)
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 
Automatic Lubrication System Automatic machine lubrication, additional lubrication options available on request
Approximate Floor Area Required 22m x 12m (72ft x 40ft)

* Variation to the specifications are available on request.

All weights and measures are approximate.

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