Happijac Camper Jack Model Comparison

For over 35 years, Happijac has been producing some of the strongest, highest quality camper jacks in the RV industry. Happijac has conducted more camper jack research, testing, and development than any other company. With a firm commitment to excellence, Happijac Company has reinvented the camper jack and is revolutionizing the industry with the first comprehensive and fully upgradeable line of camper jacks. With two distinct models of jacks spanning the weight requirements of virtually every camper on the market, finding the one that's right for you is simple and easy. In order to help you determine the right jack for your application, the key features and elements in each model are described below.

Product Specs and Features

Product

Prod. No.

Capacity/unit

Lift

Elec. Upgrade

Acme Screw Jack

4150

1500 lbs dynamic load

34.5 "

Yes

Ball Screw Jack

4500

1900 lbs dynamic load

34.5 "

Yes

Quick Release Ball Screw Jack

4600

1900 lbs dynamic load

34.5 "

Yes

capacity rated according to ANSI standard for dynamic (moving) load

4150 Acme Screw Jacks

JackModelcompare1

  • - Efficient, polished, steel screw resists rust
  • - More user friendly crank
  • - Self-lubricating nut
  • - The only jack featuring a"Fail-safe" safety nut in the industry
  • - Universal Z-bracket mounting system
  • - Strong 2" square tubing with 1/4" reinforced strap
  • - Durable, powder coat paint
  • - A full inch of travel with only six turns
  • - Quality, precision construction
  • - Concave footpad design for greater stability and minimum stress
  • - Slim, appearance enhancing, "Happijac look"
  • - 1500 lb. load lift capacity per jack
  • - No "grease line" as gear mechanism is internal
  • - Friction reducing alignment guides on both inner and outer tubes
  • - 34.5" of lift
  • - Electrical upgrade option
4500 and 4600 Ball Screw Jacks

JackModelcompare2
  • - Efficient, polished, black oxidized, alloy steel screw.
  • - User friendly crank
  • - 144 hardened, chrome molly steel ball bearings
  • - Dual ball bearing circuits provide "fail safe" operation
  • - Universal Z-bracket mounting system
  • - Strong 2" square tubing
  • - Durable, powder coat paint
  • - A full inch of travel with only five turns
  • - Quality, precision construction
  • - Concave footpad design for greater stability and minimum stress
  • - Slim, appearance enhancing, "Happijac look"
  • - 1900 lb. load lift capacity per jack
  • - No "grease line" as gear mechanism is internal
  • - Friction reducing alignment guides on both inner and outer tubes
  • - 34.5" of lift
  • - Electrical upgrade option
  • - Quick release leg (4600 only) drops leg into "ready-to-lift" position in seconds.