ARB Air
Lockers

Design and Engineering

A relentless commitment to research and design, the use of quality materials, and an uncompromising approach to manufacturing have all contributed to the Air Locker’s success in over 100 countries worldwide. The patented design of the ARB Air Locker is extremely strong, with structural components manufactured from aerospace grades of alloy steel.

Recent developments have seen forged gears and an improved two piece design add increased strength and durability, whilst reducing the amount of moving parts to ensure precision amongst components and a much firmer and responsive activation. These additions have also resulted in increased load bearing capabilities.

The design process of an Air Locker involves countless hours of testing. Computerised Finite Element Analysis (FEA) allows the designer to subject each Air Locker design to ‘virtual’ off road driving stress simulations much more extreme than those experienced in real life, including extreme temperatures and harsh wheel spin. Prototypes are tested to ensure the strength of the Air Locker exceeds that of the axles or other driveline components. Finally, field testing is carried out with units being fitted to 4WDs that operate in the harshest environments imaginable. Once this exhaustive design phase is complete, Air Lockers are manufactured in Australia by ARB, and sold throughout the world.

ARBAirLockerEngineers0415_044

For peace of mind, all ARB Air Lockers are backed by an industry leading five year warranty.

1
2
3
4
5
6
7
8
9
10
11
12
1

Diff case

Fully machined one piece nodular iron diff carrier case offers the rigidy of a one piece factory differential with twice the standard number of pinion gears to cope with the torque.

2

Flange cap assembly

Fully machined nodular iron flange cap incorporates the stationary side of ARB's tough, proven and patented timed locking mechanism.

3

Splined side gear

High grade surface treatments, forged nickel alloy steel and ARB's patented timed locking system make this the most ‘lockable’ gear in the industry.

4

Pinion gear

Combining the strength of forged nickel alloy steel with redefined gear tooth geometry, ARB has revolutionised locking differential gear design to yield structural advantages of up to 30% over commercially available high strength gears.

5

Clutch gear

ARB's patented locking system actually supports the side gear teeth, giving you more torque handling exactly when you need it.

6

Spider block

A billet machined alloy steel spider block supports the cross shafts, using the torque applied at each shaft to support the next shaft along.

7

Long cross shaft

Alloy steels and performance surface technology make for a high pressure running fit that can handle an enormous amount of punishment.

8

Cross shaft retaining pin

Custom made one piece hardened retaining pins lock into the assembly using a tapered thread junction.

9

Bonded seal

Steel reinforced, elastomer bonded annular seal has been proven to handle 20,000+ cycles under the most extreme climatic temperatures on earth.

10

Return spring

Instead of a complex external actuator system to engage/disengage the lock, ARB Air Lockers use up to 12 return springs to support the entire profile of the locking gear for a fast, positive and independent disengagement.

11

Air supply

At the flick of a dash mounted switch, compressed air is delivered to a seal housing assembly via a nylon air line.

12

Solenoid valve

Manufactured from a machined and anodised billet, and sealed against moisture and dust to IP54 standards, ARB’s heavy duty solenoid controls the air actuation.