Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X225
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X225 is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 225mm 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
- Stroke225 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 SAILF50X225
The AirTAC SAILF50X225 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. This mechanism engages automatically when the piston reaches the extended stroke end, ensuring your load remains securely held without relying on live air pressure. It delivers a robust 982N push force at 0.5 MPa, supported by a 20mm carbon steel rod.
Because the lock physically clamps the rod at the terminal position, the variable air cushion at the locker end is intentionally shorter (20mm) than the free end (30mm). The lock releases automatically via air supply to the release port, or manually via the override lever. For position sensing, you can add a magnet to use AirTAC CMSE reed or DMSE solid-state sensors.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X225 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X225 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 225 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 SAILF50X225 Is Used
Vertical Lift Holding
Secures raised platforms or elevating gates at the extended top position, preventing sudden drops if compressed air supply is lost.
Pallet Stopper Arm
Extends fully to halt heavy pallets on a packaging line, locking rigidly in the out position to absorb repeated impact without retracting.
Safety Gate Barrier
Extends a physical guard across a hazardous zone during machine operation, holding the barrier open safely under spring pressure until released.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X225 the Right Lock Cylinder?
Choose this 50mm bore model when an application requires holding a load securely at the extended rod-out position; if you need to hold the retracted position, select the SAILB variant instead. If your process requires locking at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice. Stepping up to a 63mm bore raises the push force to 1559N at 0.5 MPa, while dropping to a 40mm bore reduces it to 628N.
Ensure your pneumatic setup avoids fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve. The 225mm stroke exceeds 300mm, so verify your side-load limits and use appropriate guide rails to prevent rod binding. Replacement parts must match the 50mm bore, 225mm stroke, front locker position, PT port threads, 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 SAILF50X225 FAQ
At 0.5 MPa operating pressure, the 50mm bore provides a push force of 982N and a pull force of 825N. At the maximum 1.0 MPa pressure, it achieves a push force of 1963N.
The lock is spring-applied and air-released. It engages statically when the piston reaches the extended stroke end in the front cover, holding the load without live pressure. To unlock, supply air to the release port or use the manual lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X225
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.