The HL Series has a longer reach forming peen, making it easier to form the rivet. It is normally available with a 4º forming angle, with some ranging from 3° to 6°, requiring more downforce than the HS Series. With the extra downforce, shank swell is a possibility, making formed rivets locked in place and more resistant to joint fatigue.
Learn how to correctly specify torque, retention, and joint strength for permanent assembly, and how monitoring and validation improve consistency.
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