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B554 Model, four-furrow disc stump jump plough, horse-drawn, 'Suncog', steel, made by H V Mckay Pty Ltd, Sunshine, Victoria, Australia, 1920-1929.. Click to enlarge.

Model of a stump jump plough

Made by H V McKay Pty Ltd in Australia, Oceania, 1920-1930.
This model is of a four-furrow, 'Suncog' stump-jump disc plough. It was made in Australia by H.V. McKay Pty Ltd of Sunshine, Victoria. Full-size Suncog stump-jump ploughs were an Australian innovation made by this famous Australian agricultural manufacturing company at Sunshine from 1913 . The discs on the plough slope backwards so that they entered the ground with an undercut. In the Mallee areas of NSW and Victoria this type of plough was popular for ploughing virgin land. It was also effective for summer fallow dealing with weeds, paddymelon and stinkwort.

Stump-jump disc ploughs were largely the invention of James B. Garde, (who was manager of the Tillage Department of McKay's Sunshine Harvester Works at Sunshine, Victoria, Australia) and C.A. Peacock (a Victorian ploughmaker), just after the turn of the century. Garde applied the stump-jump principle to the disc plough soon after its arrival in Australia, taking advantage of the rolling action which reduced the friction of the mouldboard and shares. The stump-jump disc plough enabled the arid scrub country to be cultivated. Its heavy frame bore down on the scrub and the discs sliced through the roots and bushes burying some of the undergrowth but leaving most of it on the surface so it could be collected. These ploughs usually consisted of concave steel discs mounted on an independently sprung member so that when a disc met a root too thick or too hard to cut through it rode over it and was immediately pulled back down again by a strong spring. The discs were set at an angle both to the ground and the furrow-wall. This allowed them to have a scooping action and while they did not make a deep or well turned furrow they were certainly very useful in cultivating new land. The size of stump jump disc ploughs ranged from two-furrow to nine-furrow models and they were so well suited to Australian farming conditions that they became the most widely used primary cultivation implement.

Margaret Simpson
June 2017


Object No.


Object Statement

Model, four-furrow disc stump jump plough, horse-drawn, 'Suncog', steel, made by H V Mckay Pty Ltd, Sunshine, Victoria, Australia, 1920-1929.

Physical Description

Model, four-furrow disc stump jump plough, horse-drawn, 'Suncog', steel, made by H V Mckay Pty Ltd, Sunshine, Victoria, Australia, 1920-1929.

Model of a 'Suncog' stump jump plough made of steel. The plough is rectangular in shape and features the operator's seat at one end with three levers that control the wheels. There are four rotary discs for ploughing joined to the centre metal frame with a spring connected to the front of each. There is also a chain and hook attached to the front of the plough for a team of horses. The plough is painted dark red and black with yellow wheels and faint yellow stylised decoration on the body.


Handwritten in yellow on the plough is 'HV MCKAY PTY LTD SUNSHINE SUNCOG'.



465 mm


500 mm


970 mm



This plough was made and donated by H V McKay Pty Ltd in Australia around 1920-1929.


Credit Line

Gift of HV McKay Ltd, 1929

Acquisition Date

2 July 1929

Cite this Object


Model of a stump jump plough 2020, Museum of Applied Arts & Sciences, accessed 9 July 2020, <>


{{cite web |url= |title=Model of a stump jump plough |author=Museum of Applied Arts & Sciences |access-date=9 July 2020 |publisher=Museum of Applied Arts & Sciences, Australia}}

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