De-sta-co 817-U Pneumatic Hold Down Toggle Clamp

Product Description

The DE-STA-CO 817-U is a pneumatic hold down toggle clamp designed for workholding applications in manufacturing, assembly, and fixture tooling environments. It operates on compressed air up to 145 psi and delivers an inner holding capacity of 375 lb (1670 N). The U-bar opens to 95 degrees, providing clear access to the workpiece during load and unload cycles. With a height under bar of 2.69 inches and a cylinder bore of 1.26 inches, this clamp is suited for medium-duty production fixturing. It is installed by machinists, tooling technicians, and fixture builders working in automated or semi-automated production lines.

The 817-U mounts vertically and is intended for use in jigs, fixtures, and workholding stations where repeatable pneumatic clamping is required. The clamp accepts Round and T-Slot sensor configurations, making it compatible with position-sensing setups common in CNC and automated assembly environments. A flanged washer is included. Port size is 1/8 NPT, which connects directly to standard shop air circuits. Operating temperature range is 14 degrees F to 194 degrees F (-10 degrees C to 90 degrees C), supporting use in a wide range of industrial environments.

Key Features

• Pneumatic actuation with maximum air pressure of 145 psi (10 bar)
• Inner holding capacity of 375 lb (1670 N); outer clamping force of 200 lb (890 N)
• 95-degree U-bar opening for unobstructed workpiece access
• 1/8 NPT air port for direct connection to standard pneumatic circuits
• Round and T-Slot sensor compatibility for position-sensing integration
• Vertical mounting orientation with flanged washer included
• Maximum mechanical advantage of 2.5:1 and 4.1:1

Compatibility

Designed for use in pneumatic workholding fixtures and tooling stations that accept vertically mounted hold down toggle clamps with 1/8 NPT air connections and Round or T-Slot sensor interfaces.

Installation Notes

Installation is typically performed by tooling technicians or fixture builders. Shut off and bleed all air pressure from the pneumatic circuit before mounting or servicing this clamp. Mounting holes accept 0.27-inch fasteners with a 1.00-inch width spacing and 0.63-inch length spacing between holes. Verify that the supply air pressure does not exceed 145 psi and that air quality meets standard industrial requirements for filtration and lubrication as applicable to the system design.