8mm Enhanced Bearing Gearbox Shell for Ver. 3

  • Model: GB-00-02
  • Shipping Weight: 0.348kgs
  • Manufactured by: Lonex


This Lonex gearbox shell for Version 3 guns features some innovations previously unseen in other gearbox shells. Most shells currently sold add reinforcement bars along the bottom of the cylinder window on the outside. Lonex has not only done the same to the outside but they've made the INSIDE flange thicker as well as DOUBLING the thickness of the top of the cylinder window to reduce the likelihood of cracking. (See Additional Images below) In addition, this shell is made of hardened zinc alloy electroplated with a layer of chromium for extra hardness. Not only does this mean resistance to scratches and oxidation, but also adds lets the tappet plate slide better by reducing friction. Also, paint won't be chipping off and fouling your internals like some other reinforced gearboxes on the market.

Because the walls of the gearbox shell have been thickened in the front, a special fiber reinforced nylon tappet plate is provided. The tappet plate itself feels quite a lot stiffer and sturdier than comparable counterparts. In the unlikely event that the included tappet plate breaks, with some minor modifications, you can replace with a standard one.

The gearbox shell also includes 8mm open-faced ball-bearing bushings. Using open-faced bearing bushings allows use of large ball bearings as well as allowing easier lubrication and service of the ball bearings. While 8mm ball-bearing bushings run a lower rate of failure due to their increased size, we recommend replacing at least the sector and spur gear bushings with solid bushings if you plan on running over 400 FPS. If you're staying under that velocity, you can keep the bearing bushings for some serious ROF.

We've read reports of this box being run on an M170 spring for an extended period of time at 30+rps. We've run this box quite hard ourselves using an M150 spring but for the sake of Canadian field limits we've since downgraded it. Chances are, if you can build it, this box can take it. For additional durability, pair this gearbox up with a 70-hardness Sorbo pad and radius the cylinder walls.

Material: Die Cast Zinc Alloy
Bushings size: 8mm
Includes: Tappet plate, 8mm ball-bearing bushings, securing plate and screws

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This product was added to our catalog on Tuesday 20 March, 2012.

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