Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80 is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 80mm 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.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Lock positionFront cover
- Rod threadM16×1.5
- 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 SAILF50X80
The AirTAC SAILF50X80 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. It securely holds the rod at the extended stroke end, providing 982N of push force at 0.5MPa. Because the lock engages via spring pressure, the extended load remains safely held even if compressed air is lost, requiring release air to disengage.
This model features a carbon steel piston rod and PT tapered port threads. The variable air cushion at the locker end is notably shorter at 20mm compared to 30mm on the free end. The lock is a static holding device that engages after the piston stops; it is not a mid-stroke clamp or a dynamic brake for moving rods.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 80 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (30 mm free end / 20 mm lock end) |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SAILF50X80 Is Used
Vertical Lift Hold
Maintains an elevated load in the extended position securely during a sudden air pressure loss or supply shutdown.
Extended Transfer Stop
Locks a diverter or gate in the fully extended outward position to halt product flow without consuming continuous air.
Safety Guard Barrier
Keeps a protective guard extended and rigidly locked in place until the release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80 the Right Lock Cylinder?
Select this SAILF50X80 when a pneumatic actuator must safely maintain an extended position during a power loss. If your application requires holding a load at an arbitrary mid-stroke position rather than the extended end, the BSAI clamp-lock cylinder is the correct choice. To increase lifting capacity, stepping up to the 63mm bore yields 1559N of push force at 0.5MPa.
Ensure proper valve selection to prevent back-pressure on the locker side, which can unintentionally release the lock; avoid fast-exhaust valves and use an independent-exhaust solenoid valve. If human safety depends on the load staying extended, always add an independent safety measure. Replacement specifications must match the 50mm bore, 80mm stroke, front locker position, PT port, and standard carbon steel rod.
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 SAILF50X80 FAQ
At 0.5MPa operating pressure, the SAILF50X80 provides 982N of push force and 825N of pull force. At 0.7MPa, the push force increases to 1374N.
The lock is spring-applied and air-released, engaging only when the rod reaches the fully extended stroke end. It provides a static hold after the cylinder stops, and can be unlocked automatically via air pressure or manually using the release lever.
Related AirTAC Lock & Standard Cylinders
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