A-Frame Sidewind Trailer Jack With Caster And Mounting Hardware Bulldog
(Bulldog Part #: JB-155157-14)
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This item is a Sidewind, Bulldog Tongue Jack with a Corrosion Resistant Gunflint Grey Paint. It is Ideal for RV and Travel Trailer Applications. This A-Frame Jack has a Front-Facing Sidewind Crank with a High Quality Gear Train. Kit includes Jack, 6" Caster and Mounting bolts.

  • Bulldog model number SWL 155X (RV)


Rating2,000 lbs
Travel13 inches
Extended (B)21.5 inches
Outer Tube2.25 inches
Inner Tube2 inches
Retracted (A)8.60 inches
Clearance (C)13 inches


  • The High Strength Mounting Bracket Provides Easy Bolt-On or Weld-On Installation - Mounting hardware included
  • 6" diameter, 2" wide Caster has a zinc plated finish


  • Jack
  • Caster
  • Mounting bolts


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.