To fit any of type of crimp connector it is vital to use the correct tooling but it should be possible to make a tool to suit the compression connectors that Rob mentioned.
The basic idea is as shown below. I,m assuming it would be made from scraps of U angled mild steel of a hefty gauge of ali alloy.
The piece of tube must be small enough to fit inside the threaded portion of an F connector but as the centre pin or conductor is never any bigger than about 1.5mm, any tube will do. The open end must
be cut square whilst a suitable sized bolt or screw is fitted in the other end.
I haven't shown them but I envisage blocks of wood will be fitted in the main channels to turn them into comfortable handles.
In use, the cable is stripped and the connector fitted. Then the connector is placed between the front plate - with the cable passing through the slot and the handles squeezed slightly so that the tube enters the other end of the connector. Now just squeeze the handles tightly together to compress the connector fully.
Obviously you will have to design the tool to open up sufficiently to accept the plug and compress it sufficiently to correctly terminate the plug.
I have the correct tool for the LRC Snap'n'Seal connectors - similar to those in Rob's link but haven't seen the connectors themselves for several years - I think they priced themselves out of the market - and with other types I've come across - PPC springs to mind
- the uncompressed connector is too long to fit in the slot of the tool!
Here's the PPC compression tool
, by the way.