Homemade guide screw module , cantilever type, characteristics of the model 1: cantilever structure, the agency shall be carried out in a big load of cantilever, accordingly institutions need to bear the load, at the same time not big volume 2. Homemade screw, the model available bearing to bearing seat, from purchasing standard parts, bearing the same precision at the same time Design can be used as a template to the model code into a step or iges universal model download, please reference!Also includes 3d original files, welcome to download!If you like,you can paypal for you to get this models or if you have any questions also you can email to me.