- Super High torque 100:300 ratio
- Helical gearset - Smoother gearbox sound
- Ideal for DMRs & high-strength springs
If you're a skilled tech looking for the smoothest-sounding gearbox around, the King Arms 100:300 HQA Steel High Torque Helical Gear Set is the way to go. Made from high-strength steel with a super-high torque 100:300 ratio, this gearset is ideal for high-power springs and DMR builds.
Helical gearsets differ from standard gears in the angle at which the teeth are cut. Helicals have teeth cut at the helix angle to the axis of rotation, ensuring constant meshing of the teeth to reduce strain and noise during cycling. This makes for a super smooth-sounding build, but requires flawless shimming and expertise to properly install.
We recommend using solid bushings and not ball-bearing bushings for this gearset due to the increased axial thrust generated by the helical design. Compatibility-wise, this gearset is for Version 2 and Version 3 gearboxes, but should also fit other gearbox designs with V2/3-compatible gears.
Please note: this set does not include a Pinion Gear for your motor, and you will need a helical pinion gear, as standard pinions won't mesh correctly.
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK 3-5 day Standard
£6.95
From
Dispatched with 24hr UK mainland
£8.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee: if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.
You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
Features
- Steel construction
- Super High torque 100:300 ratio - Ideal for DMRs and high-strength springs
- Helical gearset - Angled teeth, smoother & quieter gearbox noise
- Perfect shimming required - Recommended for experts only
- Helical Pinion Gear required - These won't work with standard motor pinion gears
- Solid bushings are recommended - Increased axial thrust compared to standard gears, bearings NOT recommended
- Fits version 2 & version 3 gearboxes - Should also work in other V2/3-compatible gearboxes
Package Includes
- King Arms 100:300 HQA Steel Super High Torque Helical Gear Set
Installation Advice
- This helical gearbox does not include a pinion gear. A helical pinion gear is required for helical gears.
- Helical gears require perfect shimming to prevent lateral wobble. Failure to properly shim helical gears can cause damage in a far shorter timeframe than standard straight-cut gears.
- We recommend using solid bushings and avoiding ball-bearing bushings when working with helical gears. This type of gearset generates more axial thrust (side-to-side force) than standard gears, which can result in premature failure of ball-bearing bushings.
Specification
General
Parts & Accessories Type | Electric Internal Parts |
|---|---|
Internal Part Type | Gears |
 | Custom Parts Helical Gears - This Helical Gearset requires an Helical Pinion Gear. It will not work with standard Pinion Gears. |
Construction
 | Black |
|---|---|
 | Steel |
Internal Part Construction | Steel |
Part Specific
Compatible Power Source Type | Electric |
|---|---|
Package Includes |
|
Electric Part Specific
 |
|
|---|---|
Gearbox Version Compatibility Variant | Version 2, Version 3, |
Size guide
Parts Fitting
Upgrades and Downgrades should only be undertaken by experienced players, or Airsoft Technicians. Please note, changing any internal parts of a weapon voids its warranty unless done in-house by our staff.
Please ensure that when fitting parts the part purchased is the correct part, as once a part has been fitted we cannot accept return.
We do know that players love to tinker, so we're here to give you help should you require it, and if needed you can get in touch with our workshop for more help!
Unique Parts
Please note that some parts may be unique to a specific brand of weapon. For example: Parts for an ASG M4A1 may not fit an ICS M4A1.
Parts from the same brand typically have a high chance of fitting, though be warned, some replicas use unique parts, so please ensure the part will fit before you attempt to fit it.
If you require help with fitting any parts feel free to get in touch with us via our Contact Us Page.
For more information with fitting parts, or should you require help, feel free to get in touch with our Workshop Department via our Contact Us Page.
Terms and Conditions relating to parts fitting can be read on our Terms and Conditions Page.