Eliminate Hand-Setting Fatigue with the High-Performance J-21 Pneumatic Portable Air Press Grommet Machine.
- Manual feed pneumatic grommet machine — durable, dependable, and ready for any workbench.
- Set Stimpson plain sheet metal grommets and washers, sizes #00 (3/16″ hole) through #4 (1/2″ hole) quickly and confidently.
- Pneumatic operation; no electrical connection required — runs on standard 120 psi shop air.
- Ability to set 900 fasteners per hour — far outpaces hand-punching and hand-setting.
- Punches a hole in the material and sets the grommet and washer in a single action, creating a secure attachment in under one second.
- Strong enough to set through multiple layers of nylon webbing and seatbelt material, yet light enough to mount on any standard workbench.
- Easily adjusts to accommodate materials of different thicknesses, including nylon and polyester flag fabric, vinyl, PVC, canvas, leather, sailcloth & marine fabrics, webbing, and more.
- Place and set grommets and washers with precision using the integrated stainless steel work plate and optional laser locating light.
- Built-in finger guard protection mechanism prevents the machine from cycling when the setting dies are obstructed — improving operator safety throughout the production run.
- Setting dies are easily changed and adjusted for different grommet sizes — making the J-21 an extremely versatile addition to any production line.

