Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250S 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 SAILF200X250S
The AirTAC SAILF200X250-S is a double-acting ISO 15552 profile cylinder equipped with a mechanical lock in the front cover. Because the lock is spring-applied and air-released, cutting the release air drives a lock pin into the rod, securing the load at the extended stroke end without relying on live pressure. In this 200mm bore size, the cylinder generates 15708N of push force and 15080N of pull force at a 0.5MPa operating pressure, making it suitable for heavy-duty positioning tasks.
This model includes a magnet for position sensing and is fully compatible with AirTAC CMSE reed and DMSE solid-state switches. The variable air cushion at the locker end measures 28mm, which is shorter than the 50mm cushion at the free end to accommodate the locking hardware. You can unlock the rod automatically by supplying air to the release port or manually via the release lever. Note that the lock engages only after the piston reaches the extended stroke terminal, providing a static hold rather than a mid-stroke clamp.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250S |
|---|---|
| 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 SAILF200X250S Is Used
Overhead Lift Hold
Secures heavy vertical lifts at the extended stroke end, maintaining the load safely in place upon air pressure loss.
Heavy Press Hold
Maintains high-tonnage press pressure at the rod-out position without consuming continuous compressed air.
Safety Gate Lock
Keeps heavy industrial safety gates fully extended and locked open during power-loss events.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X250S the Right Lock Cylinder?
Choose this 200mm bore model when an application demands high force and a fail-safe hold at the rod-out position. If the extended-position holding force is excessive for your system, stepping down to a 160mm bore reduces the push force to 10053N at 0.5MPa while retaining the same ISO 15552 mounting interface. Select SAILF when the load must be secured at the extended stroke end; for holding the retracted position, a SAILB variant is required instead. If your process requires locking at an arbitrary mid-stroke point rather than a stroke terminal, an AirTAC BSAI clamp-lock cylinder is the correct choice.
When integrating this cylinder, avoid using a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. The lock is a static holding device, not a dynamic brake, and it does not provide a numeric holding force, so confirm that specification from the datasheet. For human safety applications where the load must remain suspended, add an independent safety measure. Replacement parts must match the 200mm bore, 250mm stroke, front locker position, PT port threads, and the -S magnet option.
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 SAILF200X250S FAQ
At a 0.5MPa operating pressure, this 200mm bore cylinder provides 15708N of push force and 15080N of pull force. At the maximum 1.0MPa operating pressure, it achieves a maximum push force of 3204kgf.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold without live pressure, and you can release it automatically by supplying air to the release port or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
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