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Pneumatic Locking Swing Cylinder

Patented Quadloc® Design


High clamping and holding force in a small package.


Our clamps lock into place instantly and will continue to hold even with pressure loss!


Save time by never having to design and build your locking swing cylinders again! 

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Quadloc® Locking Swing Arm Clamp
Model #4422

Animated Video

Our Patented Quadloc® Locking Swing Arm Cylinder is an All-In-One Unit

True mechanical wedge lock with no stored energy.

Our 4422 and 4425 Quadloc® swing clamp models produce clamping forces of up to 400lbs.

The holding force will always be 500lbs regardless of clamping force.

No Need for Rods Locks or Extra Design Time

Tired of Having to Design & Build Your Locking Swing Arm Cylinders?
Our 4422 and 4425 Models Can Help!

The Quadloc® pneumatic rotary swing arm clamp is an all-in-one standard locking unit that stays locked with the loss of air pressure.


This compact swivel cylinder clamp with a strong mechanical lock, makes for an easy fit into any design with a straightforward installation and minimal design costs.

The independent rack and pinion rotate allows for more flexibility and less chance of design interference compared to a standard pneumatic, swivel swing clamp. No need to worry about clockwise or counter-clockwise clamping.


Internal Mechanism

Quadloc® Model #4422 Comparison

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Quadloc® Model 4422

  • No design time necessary because it’s an all-in-one locking swing arm clamp

  • Stays locked through loss of power

  • Only one accessory (Swing Arm #22-11) needed

  • 250lbs of clamp force at 60psi

  • 500lbs of holding force regardless of clamping force, with or without air

  • Independent rotate that requires no extra clearance

  • Swing stroke - None

  • Clamping stroke – 5.8mm

  • Total Weight – 4.9lbs

  • Total price - $2,987 / EA.

Leading Competitor Clamp

  • Significant design time required to create a locking swing arm clamp

  • Requires multiple components (Cylinder, Rod Locks, Cam Rotating Shaft Assembly, Adapters, Couplers, Swing Arm, etc..) to create a locking swing arm cylinder

  • 260lbs of clamping force at 60psi

  • Holding force of 450lbs with loss of air only

  • Extra clearance required due to its cam slot rotate

  • Swing stroke – 25mm

  • Clamping stroke – 5.0mm

  • Total Weight – 26.5lbs

  • Total price - $4,790 / EA.

Quadloc® #4422 Strength of Clamp Demo

Quadloc® #4422 Strength of Clamp Demo

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Need Manufacturing or Automation Fixturing/Tooling?

Contact Reliance Design Inc.

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