Category Archives: Automotive Service Jacks

A service jack is a device that uses force to lift heavy loads. Deelat Industrial offers both vehicle hydraulic jacks for roadside assistance, as well as floor jacks for vehicle mechanical work. They are constructed with a combination of steel and cast iron to provide optimal strength, durability and longevity.

Bottle Jacks: Uses for Lifting Cars and Trucks

Bottle jacks are a type of hydraulic jack so named because they are shaped like glass milk bottles. Traditionally, bottle jacks have been used in the automotive industry for lifting vehicles and in mechanical fields for lifting up heavy machinery. Bottle jacks and other hydraulic lifting tools are much different than scissor jacks, which are typically used with today’s automobiles. Oil is pumped into a cylinder chamber, and, when the plunger is pushed up and down, pressure builds in the piston, ultimately jacking up the heavy object.

Bottle jacks – which are commonly referred to as whiskey jacks – are commonly rated for a certain lifting capacity, generally between a half-ton and five tons. There are bottle jacks with capacities up to 50 tons, which are typically used for industrial applications. For instance, high-capacity bottle jacks (also called barrel jacks) are used to lift a house off of its foundation.

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Differences Between Bottle Jacks and Other Hydraulic Lifting Devices

One of the biggest differentiators of the bottle jack is its orientation to the object being lifted and its shape. The “bottle” or cylinder-shaped body houses a stem that contains the hydraulic ram. The hydraulic ram is surfaced with a bearing pad, which is the point of contact with the vehicle that is being lifted.

The bottle jack is known for having a vertically aligned single piston, the bottle, which when oil is pumped into the system via the hand plunger, pressure is exchanged and the bearing pad moves vertically. Often high-capacity bottle jacks, as well as higher-end models, are powered mechanically. Other differences include:

  • As a single piston system, the lift, when fully engaged, is just about twice its collapsed weight. Thus, a whiskey jack is typically used for lifting objects that have a high clearance.
  • Compared to other jack types, the bottle jack is more commonly used for short vertical lifts. They are not well-suited for very high lifts, due to the height limitations.
  • The oil is pressurized in the piston manually via a hand-pump, or mechanically. Floor jacks, on the other hand, use a foot pump to build pressure within the system.

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How to Use a Bottle Jack

In general, bottle jacks are relatively user friendly, and only a few steps are required to use the jack. For starters, a user would disengage the hydraulic ram, turning it counterclockwise. Then, you would need to release the pressure in the device. Commonly, there is a valve located near the bottom of the jack, which needs to be turned until the pressure is released and the jack is in locked position. The bearing pad is then released once the valve is unlocked. Then:

  • Place the handle in the handle assembly, which often just requires it to be placed through a ring.
  • Move the plunger up and down. Each time the plunger moves toward the floor, pressure builds in the piston, pushing up the bearing pad.
  • Place the bearing pad carefully under the object that you are lifting, ensuring that the hold is stable.

When finished using the jack, it is designed to quickly release pressure from the piston. To do this, you would remove the handle, and use it turn the valve at the bottom of the cylinder slowly. (This is the same valve you turned at the beginning.)

Shop for automotive jacks and other lifting devices on Deelat.com. We carry affordable, high-quality bottle jacks, as well as other hydraulic lifts, including floor jacks.