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Review By Aurelien Beauvois,
Aurelien Beauvois
Commande d'un Saiga 12 Tokyo Marui,pas de chargeurs supp sur le site... J'appel le shop et le ven ...
16-03-2024
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Wow, première commande, une grosse commande de rations militaires. seulement 3 jours après ma comm ...
06-02-2024
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Stephane Bracke
Je recommande à 100% livraison rapide et colis hyper bien emballé rien service au top
02-02-2024
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CNC Gearbox QD SR25 8mm QSC

6391

New product

Retroarms

Retroarms gearbox CNC SR25 QD 8mm + Spring Guide and Screw in Black Color

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124,99 € tax incl.

Data sheet

Type Gearbox shell
Color Black
Material Aluminium
Weight 146gr
Gearbox SR25
Spring Guide Quick Detach

More info

Retroarms gearbox CNC SR25 QD 8mm.

8mm gearbox in black anodized 7075 aluminum.

The SR25 gearbox is fully milled in our CNC machining warehouse.

Compared to other aluminum gearboxes, it is made from AW EN7075 T651 aluminum block, which has higher strength (590MPa), than common construction steel (390MPa).

Because of used material, our gearboxes have the best durability and resilience than common zinc-aluminum gearboxes.

We are manufacturing these gearboxes on our precise CNC milling machines in our factory. Detail in bracket (8mm) means diameter for bushings/bearings.

Package includes: CNC Gearbox SR25 (8mm) – QSC in chosen color, set of screws and QSC spring guide.

We made some useful improvements into our SR25 CNC gearboxes:

  • Spring holders have grooves, so the springs for tapped plate and trigger switch will not jump off.
  • Added groove for safety lever, so it will hold during installation.
  • Added groove for trigger spring, for better fitting.
  • AOE control hole.
  • Sockets for bushings/bearings have smaller diameter about -0,02mm (7,98mm), for non-overturning the bushings during installation. The socket edges are cutted down for better installation.
  • We enhanced grooves for wiring for 1mm, you can now use wirings with 2,5mm diameter.
  • Added protecting edge for wiring against the motor.
  • All threads are now shaped instead of cutted for better strength.
  • Both of the gearbox parts are centered by milled grooves and edges.
  • Added hole for releasing anti-reverse latch.
  • For better durability, we added more material around cylinder head part of the gearbox, this was the most critical part and we added 100% more material where is huge radius.
  • Added groove for anti-reversal latch spring, so it will not jump off.
  • Outer edges are now cutted off.
  • You can find what type of sockets gearbox have on the outside part of the gearbox (8mm or 9mm).

RetroArms gearbox has quick spring change system QSC, where you can put out whole spring guide with hex key and change the spring without need of opening the gearbox.

In this solution, you need to secure spring guide with screw, commonly with SR25 replicas, it is by stock screw.

In situations where you have folding stocks or no stock at all, you have to secure the spring guide with QSC screw.

Otherwise there could be situation, where the spring guide will stuck with the spring.

This is because the spring guide is not fixed in the gearbox but has will for easy removing with hex key.

Space for trigger switch is designed for compatibility with trigger switches, trigger units from common manufacturers for example: Gate, etc.

CNC gearbox SR25 has protective anodizing, even when it is problematic to anodize aluminum EN AW 7075 T651 (Dural), because of its high strength and hardness. If we did not anodize products from this material, there is huge risk of corrosion (huge gray spots with rotten look).

CNC gearbox can be installed only in airsoft replicas with Tokyo Marui compatible standard.

That means even the inner parts.

Do not use rude force during installation.

Use only 1Nm tightening moment on screws, otherwise the screws will overturn in heads.

There is no need of tightening screws with rude force, if you want to be sure that screws will sit perfectly, use thread glue or thread color.

You can use in our CNC gearbox any spring of your choice, but be aware that stronger springs will result in lower durability.

!! do not use MAXX cylinder head !!

Installation of the inner parts and gearbox requires professional knowledge, experience and skills.

There are a lot of airsoft manufacturers on the market and every one of them create their own sizes, there are no standards like engineering ISO in airsoft.

This is the main problem with a lot of inner and outer parts from different manufacturers which can be same product, but with different dimensions.

We recommend using only parts from manufacturers with Tokyo Marui compatible parts, where should not be a problem with compatibility with our CNC gearbox.

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