Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 500mm stroke and a built-in spring-applied, air-released mechanical lock in the front cover — it holds the load at the extended (rod-out) stroke end even when air is lost.
- BoreØ80 mm
- Stroke500 mm
- Port sizeG3/8
- Lock positionFront cover
- Rod threadM20×1.5
- UnlockAir + manual
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500
The AirTAC SAILF80X500 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. This lock engages when the piston reaches the extended stroke end, securely holding the rod out without requiring continuous live air pressure. With a 25mm carbon steel rod and a 3/8 PT port, it generates 2513N of push force and 2268N of pull force at 0.5 MPa.
The locking mechanism is a static holding device, not a dynamic brake for a moving rod. Because the lock occupies end-cover space, the variable air cushion at the locker end is 22.5mm, which is shorter than the 36mm cushion on the free end. To release the load, supply air to the release port for automatic unlocking or use the manual override lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 500 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released (front cover) |
|---|---|
| Unlock | Automatic (air) & manual |
| Operating pressure | 0.15 – 1.0 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable (36 mm free end / 22.5 mm lock end) |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAIL datasheet (ISO 15552). Confirm against the product label before installation. Port options: PT / G.
How the Lock Holds
The lock is spring-applied and air-released: a spring drives a lock pin into the rod when the release air is removed, so the load is held at the extended (rod-out) stroke end without live pressure. Supply air to the release port to unlock automatically, or use the manual release lever.
The lock engages only when the piston reaches the stroke terminal on the front-cover side — it is a static end-of-stroke hold, not a mid-stroke clamp and not a moving-rod brake. For locking at any position along the stroke, choose a BSAI clamp-lock instead.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Cylinder thrust is separate from the lock's holding capability. Actual usable force is lower than theoretical due to friction and back-pressure — size with a margin.
Where the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500 Is Used
Vertical Lift Holding
Maintains an elevated load at the extended stroke end during a compressed air failure, preventing sudden drops.
Pallet Stop Gate
Locks a stop pin in the extended position to halt pallet traffic securely without consuming continuous air.
Safety Barrier
Keeps a protective guard or door fully extended outward during power loss to maintain a safe perimeter.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500 the Right Lock Cylinder?
Choose this 80mm bore when 50mm (982N push) is too weak and 100mm (3927N push) is oversized for your power-failure safety requirements. Select the SAILF configuration specifically when the load must be safely suspended or held at the fully extended rod-out position; choose SAILB for retracted holding. If your application requires clamping at an arbitrary mid-stroke point rather than the stroke terminal, the BSAI clamp-lock cylinder is the correct alternative.
For this 500mm stroke, add external guide rails to prevent side-load damage to the front cover lock. Crucially, do not use a fast-exhaust valve with this cylinder; use an independent-exhaust solenoid valve instead, as back-pressure on the locker side can unintentionally release the lock. If human safety depends on the load remaining extended, add an independent mechanical safety measure. Replacement parts must match the 80mm bore, 500mm stroke, front lock position, 3/8 PT port threads, and the chosen mounting style.
Quick checklist
- ✓ Hold needed at the extended (rod-out) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500 FAQ
At 0.5 MPa operating pressure, the SAILF80X500 generates 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force is 3518N, and at 0.9 MPa, it is 4523N.
The lock is spring-applied and air-released, engaging statically only after the piston reaches the extended stroke end. It does not clamp mid-stroke. Unlocking is done automatically by supplying release air or manually via the lever. Avoid fast-exhaust valves, as back-pressure can release the lock.
Related AirTAC Lock & Standard Cylinders
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