Description

CNC gearbox designed for SR25 airsoft replicas. This gearbox is manufactured from one solid block of aircraft aluminum (Dural) EN AW 7075 T651, 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 100procent 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 i..