Specna Arms Oblivion 18:1 Precision Gear Set With Improved Timing

The Specna Arms Oblivion 18:1 Precision Gear Set with Improved Timing is a high-quality gear set for AEG gearboxes, developed for airsoft players and technicians who demand maximum reliability, durability and smooth operation. Thanks to its improved timing, construction from hardened 40Cr steel and rigorous quality control, this gear set provides an excellent foundation for both standard replicas and high-performance custom builds.

The Oblivion series is designed to work seamlessly with high-performance springs, high-torque motors and modern brushless motors, making the set suitable for intensive use under heavy loads.

Improved Timing for a more reliable gearbox

The distinctive feature of the Oblivion series is the Improved Timing. In this design, the point of contact of the tappet plate has been moved to the second tooth of the sector gear, resulting in more efficient control of the nozzle during each firing cycle.

This adjusted timing ensures a smoother BB feed and reduces the risk of nozzle PME (Pre-Mature Engagement), particularly in replicas with a high rate of fire or a powerful motor. As a result, the gearbox continues to function reliably even under heavy load.

18:1 gear ratio

This version uses an 18:1 gear ratio, the most commonly used gear ratio in AEG gearboxes. This ratio offers an excellent balance between pulling power, durability and rate of fire, making it suitable for a wide range of configurations.

Whether you’re maintaining a reliable standard replica or building a powerful upgrade, an 18:1 gearset provides a solid and versatile foundation.

Made from hardened 40Cr steel

The gears are manufactured from high-quality 40Cr steel, an alloy known for its high strength and excellent wear resistance. As a result, the gears can withstand prolonged loads, powerful springs and intensive use without showing signs of rapid wear.

To further optimise durability, Specna Arms applies different hardness levels to the individual gears and shafts. This results in an optimal combination of wear resistance and impact resistance.

Designed for high-performance AEG builds

The Oblivion 18:1 Gear Set has been developed for modern gearbox configurations where reliability is paramount. Thanks to its improved timing and robust materials, this gear set is particularly well-suited to replicas that use high-torque or brushless motors and more powerful springs.

Even during prolonged use in intensive skirmishes, the transmission continues to operate smoothly and consistently.

Precision manufacturing and quality control

Every Oblivion Gear Set undergoes extensive quality control to ensure a precise fit and consistent dimensions. This ensures that the gears mesh properly, the transmission runs smoothly and the risk of assembly problems is minimised.

Correct installation, combined with a well-shod gearbox, also contributes to quiet and efficient operation.

Part of the Oblivion series

The 18:1 version forms part of Specna Arms’ extensive Oblivion series. Various gear ratios are available within this series, including 16:1, 13:1, 12:1, DSG (9:1) and 19 Teeth (SR25). This means there is a suitable gear set available for virtually every AEG configuration.

Practical insights

In high-performance AEG builds featuring High Torque or brushless motors, the nozzle timing becomes increasingly precise. Under these conditions, a standard gearset may operate less efficiently, which could affect the BB feed.

The Improved Timing feature of the Oblivion series helps to prevent this by better synchronising the nozzle movement with the firing cycle. Combined with the hardened 40Cr steel construction, this results in a durable and reliable gearbox that is suitable for prolonged, intensive use.

Who is the Specna Arms Oblivion 18:1 Precision Gear Set suitable for?

The Specna Arms Oblivion 18:1 Precision Gear Set has been developed for airsoft players and technicians looking for a durable and precision-manufactured gear set for their AEG. Thanks to its improved timing and high-quality construction, this gear set is suitable for both standard replicas and extensive tuning projects where reliability is paramount.

Key features

• Specna Arms Oblivion Precision Gear Set
• Gear ratio of 18:1
• Improved Timing for more efficient nozzle control
• Reduces the risk of a PME nozzle
• Made from hardened 40Cr steel
• Suitable for high-torque, High Torque and brushless motors
• Rigorous quality control to ensure a perfect fit
• Rockwell hardness:
  • Sector gear: HRC 42–50
  • Spur gear: HRC 42–50
  • Bevel gear: HRC 42–47
  • Gear shafts: HRC 55–60
• Weight: 69 grams

Common mistakes

A common mistake is fitting a high-quality gearset into a gearbox whose bearings, bushings or shims are not in optimal condition. The performance of new gears depends heavily on the correct adjustment of the entire gearbox.

You should also always check that the selected gear ratio is suitable for the engine and spring you are using, and for the performance you wish to achieve with the replica.

Frequently Asked Questions

What does ‘Improved Timing’ mean?
‘Improved Timing’ means that the tappet plate control has been adjusted, allowing the nozzle to move more efficiently and reducing the risk of nozzle PME.

What material are the gears made of?
The gear set is made from hardened 40Cr steel, which is known for its high strength and wear resistance.

Is this gearset suitable for brushless motors?
Yes. The Oblivion series has been developed for use with both high-torque and modern brushless motors.

What is the gear ratio of this set?
This version has an 18:1 gear ratio, a versatile ratio that offers a good balance between reliability and performance.

Is this gear set suitable for tuning projects?
Yes. Thanks to its improved timing, high-quality materials and precision finish, the Oblivion 18:1 Gear Set is ideal for both maintenance and performance-oriented upgrades.

With the Specna Arms Oblivion 18:1 Precision Gear Set with Improved Timing, you’re choosing a durable and precision-engineered gear set that combines reliability, smooth performance and a long service life. An excellent choice for any AEG build where quality and consistent performance are key.