On
this earlier thread I show hemostats modified for grabbing wires like this. These work great on high temp insulation that does not melt at normal soldering temperatures
but when soldering wires with low melting temp insulation into high thermal mass solder cup connectors these are not good enough. The insulation get completely trashed.
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod/?action=dlattach;attach=32311;image)
Here is a modification that I mentioned in that thread applied to a pair of hemostats that keeps the insulation in good shape. First I get a piece of copper tubing with an ID that matches the wire insulation diameter. Then take a diamond mandrel with a diameter that matches the tubing OD in a dremel or flex shaft and grind the pocket in the hemostat tip to receive the tubing.
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90323;image)
Tubing in place held by the latched hemostat.
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90327;image)
Brazed with high temperature silver solder
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90329;image)
Very thin jewelers saw blade used to....
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90331;image)
Saw the tube in half in line with the hemostat jaws.
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90333;image)
Jewelers saw frame, sanding sponge, abrasive bristle brush, fabric buff, files etc used to debur and polish
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90335;image)
To end up looking like this
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90337;image)
Here holding the wire ready to solder.
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90339;image)
Shown holding a wire ready to reflow into a pre filled solder cup in the heavy connectors.
![](https://www.eevblog.com/forum/projects/diy-wire-grabbing-hemostat-mod2-(insulation-saver-version)/?action=dlattach;attach=90341;image)