Through-hole connection systems available from Satcam involve a simple manual process for quick and cost-effective conductivisation of holes in circuit boards. These systems help achieve ‘plated-through’ holes on PCBs without investing in an electroplating system.
Available as kits in three sizes of 0.8mm, 1.0mm and 1.2mm, through-hole connection systems ensure a flat finish on both sides of the hole unlike eyelets and pins. Each kit contains tooling and sufficient bails for 250 holes, one size per pack. Additional packs of bail-bars are also available.
Through-hole connection systems operate by applying a conductive coating to the walls of a circuit board hole while maintaining a flat surface on both sides of the circuit board.
After hand-setting, the holes are left with a solder-plated copper wall and a solder-filled barrel. If a through-hole is not required, top and bottom pads are just soldered. Where a through-hole is necessary, the solder core is removed with a de-soldering tool or wick after soldering both sides.
Either way, the holes are left with a tin-plated electrolytic-quality copper sleeve pressed into the hole walls, flat on both sides of the circuit board.
Through-hole connection systems are also useful for repairing holes, which have been damaged during service in assembled boards, or even in chemical etch prototyping processes.
Bail-bars available in each kit consist of lengths of solder wire, which have been electroplated with pure copper, then over-plated with tin and scored at intervals of approximately 2mm. Each bail-bar is divided into 25 bails.
The end of the bail-bar is inserted into the hole using an insertion tool, following which the bail-bar is snapped off to leave one bail in the hole. An automatic snap punch is placed over the end of the bail and pressed down, compressing the bail lengthwise and expanding it radially into the walls of the hole.
After soldering both sides of the board to ensure connection between the pads and the sleeve, the hole may be de-soldered if a clear through-hole is required. Even if the application does not require a through-hole, de-soldering is still recommended to ensure that a satisfactory connection has been achieved.
Components in the kit:
- Insertion tool
- 10 bail bars (250 holes)
- 5 appropriately sized drill bits (1.5” long, 0.125” shank to suit Quick Circuit)
- Additional packs of 10 bail-bars available without the tooling