A “shoulder rivet” has a manufactured head on one end, a solid shoulder under the head and a smaller diameter shank that is solid or has a semi-tubular or tubular hole. Common rivet head styles are flat, oval, truss, button and countersunk. Among the raw materials used are steel, stainless steel, aluminum, brass, and copper. Rivet plating and coating options are selected by end user dependent on the application.
Shoulder rivets quickly and inexpensively join work-piece materials together while permitting rotation of the riveted work-piece. The shoulder of the rivet acts as a bearing surface when the rivet shank is clinched tight to the non-rotating part of the work piece(s). Shoulder rivets can act as slides, stops or guide points for assembled work-pieces. On bolt-less shelving units, the shoulder portion of the rivet is press fit into a “keyway hole” on the upright leg of the shelf to form a strong removable joint. Riveted work-pieces are most often joined together by impacting or compressing the shank end of the rivet with a crimping die (rivet anvil).
Why use Shoulder Rivets?
- High speed assembly. Rivets feed automatically in impact rivet machines that cycle in approximately 3/10th of a second. Spin/orbital machine methods of clinching cycle in approximately 5-8 seconds. Air, hydraulic or mechanical presses and hand clinch tools can also be used
- Permanent fastener with good joint strength
- Permits joint rotation and/or slide or stop points on assemblies
- Once riveted in place the shoulder can be easily press fit into keyway holes with a rubber mallet
- Ease of joint inspection
- Rivet clinches can be roll-clinched, spun, flared or press clinched
- Can be used to fasten similar or different materials of multiple work-pieces on hinged assemblies
- Inexpensive alternative to threaded fasteners
- Virtually no scrap is produced during the manufacturing process
- Easily adapted for automation
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