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Self-Piercing, Self-Clinching Tooling

Self-Piercing, Self-Clinching Tooling
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Self-Piercing, Self-Clinching Tooling - 1

TECH SHEET PEM® - REF / SELF-PIERCING, SELF-CLINCHING TOOLING SUBJECT: Specialized PEMSERTER® tooling allows installation of self-clinching nuts in one pierce/press operation. In certain situations, PEM Type S nuts can be installed successfully without the need to pre punch a mounting hole in a separate operation. If these criteria are met, the fastener, along with the tooling, can create the mounting hole during the fastener installation process. These criteria include: • Fastener will be installed into aluminum sheet. • Sheet is no harder than HB 79.7 (HRB 40). • Sheet must be between 1.5 - 2.0 mm (.059 - .079”) in thickness. • Fasteners with thread sizes 1/4-20, 5/16-18, M6, and M8 can be installed in this manner. • S nuts with a -2 shank length must be used. • Utilize punch and anvil specifically designed for this purpose. E • We can provide in-die installation equipment for this application. (Clinching profile may vary) Type Min. A Dist. Hole Fastener Material Thread Thread Shank (Shank) Sheet C E T CL To Carbon Steel Size Code Code Max. Thickness Max. ±.010 ±.010 Edge (1) .250-20 (1/4-20) Type Min. Thread A Dist. Hole Fastener Material Size x Thread Shank (Shank) Sheet C E T CL To Carbon Steel Pitch Code Code Max. Thickness Max. ±0.25 ±0.25 Edge (1) M6 x 1 M8 x 1.25 (1) To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified. TECH SHEET PEM® - REF / SELF-PIERCING, SELF-CLINCHING TOOLING

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Self-Piercing, Self-Clinching Tooling - 2

The PEMSERTER® tooling utilized for this application consists of a special modified punch and anvil (see exhibit A). The anvil will have a raised portion in the area of fastener installation. There are several reasons for the “raised ring” on the anvil. It allows the fastener to pierce its own mounting hole and then assists in the final clinching process. It also creates an embossment in the panel allowing the fastener to be installed sub-flush on the shank side of the sheet. During the process, the slug that is produced (see exhibit B) will fall away allowing for a clean installation. All...

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