Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X450S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X450S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 450mm 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
- Stroke450 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 SAILF50X450S
The AirTAC SAILF50X450-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. A spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the rod out without relying on live pressure. Delivering 982N of push force at 0.5 MPa, it provides robust load handling for vertical or horizontal power-loss safety.
Equipped with a magnet for position sensing, this model works seamlessly with AirTAC CMSE reed and DMSE solid-state electronic sensors. The variable air cushion at the locker end is specifically shorter at 20 mm compared to the 30 mm cushion on the free end, ensuring precise deceleration without interfering with the lock engagement. The carbon steel rod and PT tapered port threads ensure durable, leak-free operation.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X450S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X450S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 450 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 SAILF50X450S Is Used
Vertical Lift Hold
Maintains an elevated load at the extended stroke end during a power loss, preventing gravity-driven drops.
Clamp and Hold
Secures a workpiece at the outward stroke terminal without consuming continuous compressed air.
Gate Safety Lock
Keeps safety gates and barriers firmly open at the extended position until an air signal releases the lock.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X450S the Right Lock Cylinder?
Choose this 50 mm bore when your application requires up to 982N of push force at 0.5 MPa, or step up to the 63 mm bore if you need 1559N. Select the SAILF configuration when the load must be held securely at the extended rod-out position; choose SAILB for retracted holding. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, select the BSAI clamp-lock cylinder instead.
Remember that the SAIL lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve. Because this unit features a 450 mm stroke, mounting should include a guide mechanism to prevent excessive side-load wear on the rod. For critical human safety loads, add an independent mechanical safety measure.
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 SAILF50X450S FAQ
At 0.5 MPa operating pressure, the 50 mm bore provides 982N of push force and 825N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 200 kgf.
The lock is spring-applied and air-released, engaging automatically when the rod reaches the extended stroke end to hold the load statically. It unlocks by supplying air to the release port or by using the manual release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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