Self-Locking Cube Jacks
The Self-Locking Cube Jack is a safer, more efficient alternative to the jack-and-pack method with wooden cribbing. This hydraulic jacking system also features a small footprint and is usable in confined spaces, providing a stable lift to nearly 10 feet. Jobs are completed more efficiently due to simplified operation sequence with 50% less cycles than climbing jacks.
The Self-Locking Cube Jack system automatically mechanically locks after the lifting or lowering stroke. Self-aligning steel cribbing blocks save time, improve side load, and eliminate the need for wooden cribbing materials. The cribbing blocks are lightweight and can be handled manually.
Engineered Rigging’s Self-Locking Cube Jacks include an end block with adjustable swivel saddle which allows fine adjustment during set-up: 1.97-inch screw extension.

Cube Jack Features
- End block with tilting saddle
- Eye-bolts for hoisting
- Forklift tabs
- Removable insert table
- Cube Jack base frame
- Locating pins
- Steel cribbing blocks
- Adjustable tilting saddle
- Flow control
- Mode locking pin
- Mode selector lever
- Hydraulic connections (advance / retract)
Cube Jack Applications
Cube jacks are ideal for heavy lifting with a minimum starting height of 19 or 22 inch and requirement to lift up to 81 or 118 inches. They can be used in a variety of industries:
Self-Locking Cube Jacks
LIFTING CAPACITY PER BASE UNIT
MODEL NUMBER
Maximum Height
MAXIMUM SIDELOAD AT FULL EXTENSION
56 tons
SCJ-50
81.4”
1.5%
110 tons
SCJ-100
118.3”
1.5%