Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250 is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm bore, 250mm 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.
- BoreØ200 mm
- Stroke250 mm
- Port sizeG3/4
- Lock positionFront cover
- Rod threadM36×2
- 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 SAILF200X250
The AirTAC SAILF200X250 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This 200mm bore mechanism securely holds the rod at the fully extended stroke end, ensuring loads remain safely suspended even if air pressure drops. It delivers immense thrust, offering 15708N push and 15080N pull force at a 0.5 MPa operating pressure.
Unlike a standard SAI cylinder, this unit provides true power-failure safety. The lock engages statically after the piston stops at the extended terminal, rather than acting as a dynamic mid-stroke brake. The front locker end features a 28mm variable air cushion, which is notably shorter than the 50mm cushion on the free end, specifically designed to accommodate the locking hardware without compromising end-of-stroke deceleration.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 250 mm |
| Acting type | Double acting, with lock |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable (50 mm free end / 28 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 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 SAILF200X250 Is Used
Vertical Lift Safety
Holds heavy lifted platforms securely at the extended stroke end during a sudden power loss, preventing catastrophic drops.
Heavy Press Hold
Maintains maximum outward clamping pressure on large fabricated components without consuming continuous compressed air.
Gate and Guard Locking
Locks industrial safety gates and heavy access barriers in the open, extended position until the release air is restored.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250 the Right Lock Cylinder?
Choose this 200mm bore when an application requires extreme force combined with fail-safe holding at the rod-out position. If your system only needs to hold a load at the retracted stroke end, select the SAILB200 instead. For applications requiring the rod to be clamped and held at an arbitrary mid-stroke point, AirTAC BSAI clamp-lock cylinders are the correct choice, as the SAIL lock only engages at the stroke terminal.
When integrating this cylinder, never use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; always utilize an independent-exhaust solenoid valve. If human safety depends on the load remaining elevated, add an independent mechanical safety measure as well. Replacement parts must match the 200mm bore, 250mm stroke, front locker position, 3/4 PT port, and carbon steel rod. For this 250mm stroke, ensure external guides support side loads to prevent rod binding. Note that without the -S magnet option, CMSE reed and DMSE electronic sensors cannot be mounted.
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 SAILF200X250 FAQ
At 0.5 MPa, the 200mm bore provides 15708N of push force and 15080N of pull force. At 0.7 MPa, the push force increases to 21991N, and at 0.9 MPa it reaches 28274N.
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, not a dynamic brake for a moving rod. To unlock, supply air to the release port for automatic release or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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