Rolled knuckle spring hinges

Spring hinges 160 mm long

Opening spring force for part numbers 71-1-3580 and 71-1-3581:
M(0°): 0.9 N.m / M(90°): 0.86 N.m / M(180°): 0.6 N.m

Closing spring force for part numbers 71-1-3618 and 71-1-3835:
M(0°): 0.12 N.m / M(90°): 0.44 N.m / M(180°): 0.55 N.m

Punched pin.