I have a current project that will benefit from using ball connectors
so I have been looking at some of the "quick link" types.

The black one on the left (in the pic) is a simple compact design.
I like everything about it with two exceptions - the pressure required
to insert or remove the ball stub into or from the ball receiver seems
on the high side to me. The other downside is the hex nuts on the ball
stud are smaller than 4-40 hardware.

It may be possible to increase the orifice size slightly and adjust
the pressure - I have not tried. I also wonder if the design could be
improved by using a metal "C" ring to retain the ball in the socket.
Selecting the correct size of ring would control the engage/disengage
tension and with it's smooth, clean look this could easily become a
favorite.

The blue connector is shown assembled in the center and disassembled to
the right. The slide collar release/engage is really slick. Easy to operate
even for those with large hands or limited dexterity. Another feature of
this design is how the spring and collar work together to remove all
slack in the swivel connection. The fit of the ball in the socket is
very precise anyway but with the spring pushing, it is truly a zero slack
ball connector. The threads on the ball stud and threads in the connector
body (blue piece) are 4-40 (three other sizes available). The only downside
is the ball stud and it's hardware is not brass or stainless.

I found these Sullivan ball connectors at Advantage Hobby:

www.advantagehobby.com/

and

www.sullivanproducts.com/Locat...tsMainFrame.htm

The cost is slightly higher for these Sullivans but the convenience and
precision makes it well worth it to me. Until something better comes
along, this design will remain my first choice.

I'd like to try the blue one's do u have a part number for them ??

Good info thanks

My invoice from Advantage Hobby reads:

SKU: SUL591
Product: 4-40 Aluminum Ball Link with Locking Sleeve (blue)
Price: $6.26

Thanks I see

SUL S590 2-56 Threaded Ball Joint
SUL S591 4-40 Threaded Ball Joint
SUL S592 2mm Threaded Ball Joint
SUL S593- NEW 3mm Threaded Ball Joint

Now I can get local hobby shop to order.. Thanks or

www.advantagehobby.com/115682/SULS591/



Randy