Tog-L-Loc® Sheet Metal Joining For use with Series 2000 and Series 3000 Presses
Tog-L-Loc® (a BTM Corporation® product) is a cold-forming clinch process which uses a
special punch and die to form a strong interlocking joint within the metals themselves.
The result of the process is a round, button shaped extrusion on the die side of the
assembly, and a small cylindrical cavity on the punch side. The joint is comprised
wholly of the sheet metals that were joined. No adhesives, external fasteners, or
welding is utilised in the process.
Joins plain, coated & dissimilar metals.
No rivets, screws, or other fasteners.
Eliminates spot welding operations.
Long tool life: 300K joints common.
Joins in a single press stroke.
Non-destructive testing w/ simple gage.
Strong and highly fatigue resistant.
No sparks, fumes, or soot.
A typical Tog-L-Loc® joint is created in under a second and features three basic
steps as shown in this cross section diagram: