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All-steel Landing Gear from Boden

19th January 1962
Page 35
Page 35, 19th January 1962 — All-steel Landing Gear from Boden
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Weightand Cost-saving Advantages

NAANY semi-trailer landing gears use a IVI high percentage of aluminium alloy in their construction and, whilst this has obvious weight-saving advantages, the use of this type of material carries an inevitable cost penalty. Significant, therefore, is today's an.nouncement from Boden Trailers. Ltd,, Royton, Oldham, Lancs., that they have—following a twoyear development period --produced an all-steel landing-gear set weighing only 240 lb., a figure which is strictly comparable with that of light-alloy landing gears of the same capacity.

A fairly heavy investment in tooling has made it possible to apply modern production techniques to the fabrication of the new gear and because of this, and the lower cost of the material, the manufacturers are able to offer it at almost 30 per cent. lower initial cost than that of comparable types of gear; it is intended that the assemblies shall be available to any manufacturer of semitrailers.

The landing gear, known as the Boden Mark 2, is of the inverted-screw design, incorporating a continuously oilimmersed screw and phosphor-bronze nut. The screws operate in roller thrust bearings and all the rotating parts run in sintered non-ferrous oil-retaining bearings. Except for the screw gears, two bosses and one shaft, all the components of the landing-gear assembly are either steel pressings or tubular steel forgings, and the simplicity of dealing with ferrous material, as opposed to aluminium alloys, has enabled production costs to be kept down.

The landing gear is delivered with the bevel gears treated with cardium compound, the internal parts being coated with rust-preventive oil and the major slide-bearings packed with grease. The external finish is one dip-coat of red oxide/zinc chromate primer.


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