Tubular Swivel Trailer Jack Bulldog
(Bulldog Part #: HB-178151)

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This item is a topwind, Bulldog tongue jack with a gray painted finish and a zinc plated inner leg. Rolled acme threads of inner Screw which allows for smooth, powerful cranking. Sealed unit.


    Rating5,000 lbs
    Travel15 inches
    Extended (B)29.70 inches
    Installation InstructionsCLICK HERE
    Retracted (A)14.70 inches
    Clearance (C)10 inches


    • Inner tube diameter - 2" / Outer tube diameter 2-1/4"
    • Ideal for agricultural, commerical trailers
    • Limited 5-year warranty


    • 9/16" Pull Pin
    • Weld-on pipe mount
    Installation Instructions CLICK HERE


    1919 - In a small third floor room over his car dealership in Wausau, Wisconsin, Thomas J. Jacob begins making high-quality precision tools of his own design. His venture becomes known as the Hammer Blow Tool Company. The death of a favorite hunting dog due to an accident involving a poorly-designed trailer hitch leads Jacob to develop the first drop-forged ball-and-socket trailer hitch, which he names the "Never Lets Go" Bull Dog. More inventions follow, positioning Hammer Blow at the forefront of the trailer industry at its infancy.

    1930's - Demonstration models of camper trailers built by Jacob at the Chicago World's Fair set off a period of rapid growth in the industry.

    1940's - Jacob dies in 1945. His wife, Lula, takes over Hammer Blow and guides it with great success for more than 20 years.

    1960's - In 1967, Lula Jacob sells Hammer Blow to Neway Equipment Company of Muskegon, Michigan, which later sells to Lear Siegler, Inc.

    1970's - In 1977, private investors led by Thomas J. Reinhart purchase and rename The HammerBlow Corporation. Expansion of the mechanical jack line and related products continues for more than a decade.

    The above information has been provided by the Manufacturer, and we cannot guarantee the accuracy thereof or endorse the opinions expressed.