|Catalog Number 30G2A - Coupler Pocket, 3” or 5” Scale|
Coupler Pocket, 3” or 5” Scale
Catalog Number 30G2A
This coupler pocket is for appearance only, it does not support the coupler. The most common way to mount and support this size of coupler is to use a length of rectangular steel tubing, 2” by 4” in outside dimensions (50mm by 100mm) and having a wall thickness of 1/4” (6mm). The inside dimensions of this tube will accommodate the same size coupler shank as the opening in this pocket. Bolt or weld this tube to the car frame and drill a cross hole for the coupler mounting bolt.
In use the coupler pocket provides a prototype appearance to the end of your car. It can be applied to metal or wood end sills, or directly to the end of the car. Its use and final appearance will depend on your application.
The end opening fits most standard coupler shanks. If your coupler is higher than this it will be necessary to reduce the size of the shank by milling, filing, or grinding. If the shank is much less than this height it should be spaced using washers at its mounting to center it in the opening. The opening width allows adequate swing for most couplers. The farther the coupler pivot is behind the pocket the more the opening will restrict the swing of the coupler. It is important that the final mounting allow free swinging of the coupler. Please realize that this part is only one component of a well designed car. The reliability and safety of your car, and your enjoyment of it will depend on how well you design the overall car. These instructions are provided to give the basic details of use. They are not intended in any way to be design guidance for the entire car. If you do not feel comfortable doing the design yourself we strongly advise you to seek out more experienced modelers for help. If you are unsure of anything, please contact us.
Installation on Car
The coupler pocket is supplied without mounting holes to allow you to locate holes as required by your design. It is made from cast aluminum and is easily drilled. Many bolt patterns are possible ranging from one or two on each side to one between every rib. Rivets may also be used on metal car frames. The pocket may be fully on the end sill, or may hang below the lower edge. The pocket may also have its base size trimmed and/or corners rounded if desired.
The most common standard for this size of equipment calls for the center of the coupler to be mounted 8 7/8”(225mm) above the top of the rail. If your requirements differ you should follow your own standards.
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