RA CNC gearbox 8 mm QSC Ver 3

CNC gearbox V3 designed for airsoft weapons type AK and various modifications of AK weapons, made of the block of the strongest aircraft duralumin EN AW 7075 T651, which has a higher tensile strength (590MPa) than ordinary structural steel (390MPa). Thanks to the material used, the gearbox has several times longer service life than a conventional zinc collar gearbox. We produce gearboxes on precision CNC machine tools, directly in our factory. The number in parentheses (8mm) indicates the diameter of the bearing bore. for design and strength reasons it is not possible to produce with a hole for 9mm bearings.

The package contains: CNC gearbox V3 AK (8mm) - QSC in the selected color variant, a set of screws and QSC spring guide.

We have incorporated many useful improvements into the V3 CNC gearbox:

• The spring holders have a notch so that the spring of the feeder arm and the trigger shuttle do not fall.
• The holes for the bearings have a diameter smaller by -0.02 mm (7.98 mm), so that the bearing does not rotate after mounting and the leading edges are chamfered, which simplifies installation.
• The motor wheel has a window to simplify the setting of the motor pressure.
• All threads are now formed, they have a higher strength than the cut thread.
• Both halves of the gearbox are centered by milled protrusions and grooves.
• We have added a notch for the spring of the backstop so that it does not pop out during assembly.
• The outer edges are chamfered.

The gearbox has a quick QSC spring change, thanks to which the spring can be pulled out by simply turning the Allen key with the spring mandrel, without the need to disassemble the gearbox. With this solution, it is necessary to secure the spring conductor with a screw, which is done with a QSC screw. Otherwise, there may be a situation where the spring conductor gets stuck in the spring. This is due to the quick replacement of the spring, the spring guide is not fixed in the gearbox, but so that it can be pulled out by turning the key. The second variant is a fixed spring guide, which does not allow quick replacement of the spring, but it is not necessary to secure the spring guide with a QSC screw.

The space for the trigger contacts is adapted so that it is possible to install and use common trigger contacts and processor units from commonly available manufacturers such as Gate, etc.

The CNC gearbox V3 has a surface treatment with protective anodizing, because thanks to the properties of duralumin EN AW 7075 T651 it is practically non-anodized, due to its high hardness and strength compared to normally anodizable aluminum, ordinary anodizing does not penetrate into the material. If this dural is not protected by a surface treatment, there is a high risk of corrosion of aluminum (large gray spots, sometimes with a moldy appearance).

The CNC gearbox can be installed in airsoft weapons in the Tokyo Marui compatible standard. This also applies to internal parts. Never use brute force when installing internal parts or the gearbox itself. When tightening the screws, use a tightening torque of max. 1Nm, otherwise the wrench will turn in the screw head. It is not necessary to tighten the screws "to blood", if you want to be sure that the screws will not loosen, use an optional thread glue or paint.

Any spring force can be installed in the CNC gearbox, but it is necessary to realize that the stronger the spring, the lower the life of the gearbox.

!! do not use MAXX cylinder head !!

Installing internal parts in a gearbox as well as a gearbox in a weapon requires expertise, experience and skill. Thanks to a large number of different manufacturers of airsoft weapons, where each manufacturer "invents" its dimensions and there are no standards in airsoft as we know common from mechanical engineering such as ISO, etc., one type of weapon from several manufacturers can be completely different, both in size and size. by making internal parts or a mechanism. Therefore, we recommend weapon manufacturers who state Tokyo Marui compatible, where there should be no problem with the compatibility of the CNC gearbox.