Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50 is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 50mm 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
- Stroke50 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 SAILF50X50
The AirTAC SAILF50X50 is a double-acting profile cylinder with a built-in mechanical lock housed in the front cover. Dimensionally interchangeable per ISO 15552, it features a 50mm bore and 50mm stroke, generating 982N of thrust at 0.5MPa. The integrated spring-applied, air-released lock engages automatically when the piston reaches the extended stroke terminal, ensuring your load stays securely held without relying on continuous live air pressure.
This model uses a 1/4 PT port and a 20mm carbon steel rod. Because the lock occupies the front end, the variable air cushion on that side is notably shorter at 20mm compared to the 30mm cushion on the free end. You can unlock the rod pneumatically via the release port or by using the manual override lever, and the extruded aluminum barrel includes dual sensor grooves for mounting CMSE reed or DMSE solid-state switches.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 50 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 SAILF50X50 Is Used
Extended Load Holding
Maintains an elevated platform securely at the extended stroke end during a power loss, preventing gravity-driven collapses.
Clamp and Hold
Pushes a workpiece forward and locks it in the outward position, eliminating the need for continuous pneumatic pressure during machining.
Gate Safety Stop
Secures a heavy safety gate in the open position, using the mechanical lock to keep the path clear until actively released.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X50 the Right Lock Cylinder?
Choose this SAILF variant when a process specifically requires holding a load securely at the fully extended rod-out position. If your application needs to stop and hold at the retracted end instead, select the SAILB equivalent. For clamping at any arbitrary mid-stroke point rather than a stroke terminal, the BSAI clamp-lock cylinder is the correct solution.
Remember that this lock is a static holding device, not a dynamic brake for a moving rod. Valve selection is critical: avoid fast-exhaust valves and use an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. If human safety depends on the load remaining elevated, always add an independent safety measure. To replace this unit, match the 50mm bore, 50mm stroke, front lock position, PT ports, and standard mounting options like FA, FB, or TC.
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 SAILF50X50 FAQ
At 0.5MPa, it 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. It engages only when the piston reaches the extended stroke end in the front cover, holding the load statically without live pressure. You can release it pneumatically or via the manual override lever.
Related AirTAC Lock & Standard Cylinders
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