Two types of Coach bogie frames are available to the 3mm modeller. The top picture shows a flexible type supplied by the Society, these are made by MJT and mirror those produced by them in other scales. Pin point bearings need soldering in before assembly starts. Supplied with wire and press studs for mounting they are easy to make in an evening and then just need the sideframes attached.
The lower image shows the type supplied by 3SMR and are again a simple fold up type but with no form of compensation. They are also a little scant on the width side ,I get over this by using old Society wheels that ride in the frame rather than have pin point bearings added. Quick to make, these I mount to the chassis with nut and bolt rather than press stud. The other upside of this type is that the couplings can be attached to the frame whereas the compensated type needs a braket made up to accomodate the coupling.
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