---
publication_id: "OT-2026-000001120"
title: "Rotary installation tools for clinch fasteners"
published_at: "2026-09-15T19:03:53.907464Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000001120"
categories:
  - "tools-tooling/clamping-tools"
keywords:
  - "b21k25/00"
  - "b25b27/0007"
  - "b25b27/0007"
  - "b23p11/00"
  - "b23p11/005"
  - "b23p11/005"
---

# Rotary installation tools for clinch fasteners

## Abstract

Tooling is held within the nose of a rotary punch and as the tool is rotated and forced against a workpiece a fastener within the tool becomes affixed to the workpiece. The tools have displacers which non-destructively deform and reshape the workpiece without any loss of workpiece material. The tools have various types of displacers including: tapered and arcuate displacers which act in concert to progressively act upon the workpiece; spherical displacers which may be fixed. or a full-circle displacer ring which wobbles as it presses against the workpiece. In the case of fixed spherical displacers, a multi-stroke method can be employed where the tool is rotated after each stroke in a group of installation strokes.