Updated on September 24, 2023


Created on August 27, 2015

IZ Southern Cross Windmill

A windmill-powered water pump

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Product Description

The IZ Southern Cross Windmill, manufactured by Southern Cross Industries, is a water pumping windmill which operates a reciprocating pump for potable water pumping and stock watering applications. Windmills are available varying sizes from 8 – 14 ft (2.5-7.5 m) in diameter suitable for water depths of up to 100 m.


Target Countries

Botswana, Mozambique, South Africa, Zimbabwe

Target SDGs

SDG 6: Clean Water and Sanitation

Market Suggested Retail Price


Target Users (Target Impact Group)


Distributors / Implementing Organizations

Southern Cross, South Africa.

Competitive Landscape

Manufacturing/Building Method

The IZ Southern Cross Windmill is manufactured in Southern Cross's manufacturing facility in Bloemfontein, South Africa.

Intellectural Property Type


User Provision Model

The IZ Southern Cross Windmill can be ordered from and is distributed by Southern Cross.

Distributions to Date Status


Pump type

Wind powered pump

Power requirement (W)


Average flow rate (L/min at specific head)

84 L/min at 20 m

Maximum head (m)

40-100 m

Diameter (cm)

4-7.6 cm

Design Specifications

The Southern Cross IZ pattern windmills are made to 5 different sizes – 6 ft, 8 ft, 10 ft, 12 ft and 14 ft diameter of Wind wheel. The main benefits of the IZ Southern Cross Windmill include: Replaceable gearbox bearings without dismantling the mill engine. Completely enclosed, dust and weather proof engine. Strong tension arm windwheel with galvanised steel fans. Automatic oiling. Double reduced gears with machine cut teeth. All steel part heavily galvanised. The product specifications depend on the requirements of the site. For example: Boreholes tested for a yield of 84 L/min at a depth of 30 m where the site requires 15,000 L/day, requires a design of: 12 ft (3.7 m) windmill. 90 mm pump. 64 mm pipe. 16 mm pump rod.

Product Schematics

Technical Support

Technical support is provided by Southern Cross. Troubleshooting problems is provided in the installation and maintenance manual for the IZ Southern Cross Windmill.

Replacement Components

The bearings for the gearbox are replaceable, without the need to dismantle the mill engine.


The product can function for 50 years with maintenance.

Manufacturer Specified Performance Parameters

The manufacturer performance targets include: Economical Environmentally friendly/Green energy Suitable for almost any terrain Easy to install and maintain

Vetted Performance Status



No hazards listed by the designer.

Complementary Technical Systems

The IZ Southern Cross Windmill can be applied to older Southern Cross towers or towers of any other make.

Academic Research and References

Baker, K., 2017, “From aesthetics to function, history to rarity: The significance of windmills“, 19th Australasian engineering heritage conference: Putting water to work: Steam power, river navigation and water supply. Mildura, VIC: Engineers Australia, pp. 20-35.

Cross – home (2023) Southern Cross Industries. Available here

Contact us Kijitowindpowerkenya.co.ke. Available here

Goal 6 Sdgs.un.org. Available here

The Southern Cross IZ pattern windmills are made to 5 different sizes. Available here

Installation manual available here


Compliance with regulations


Evaluation methods


Other Information


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