Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X500
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X500 is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 500mm 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
- Stroke500 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 SAILF50X500
The AirTAC SAILF50X500 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages when the piston reaches the extended stroke end, firmly holding the rod in place without requiring continuous live air pressure. Delivering 982N of push force and 825N of pull force at 0.5MPa, it is dimensionally interchangeable per ISO 15552 standards.
Because the lock occupies the front end, the variable air cushion on that side is shorter at 20mm compared to the 30mm cushion on the free end. The cylinder operates at speeds from 30-800mm/s and uses a PT port thread type. For position sensing, adding a -S magnet enables compatibility with AirTAC CMSE reed and DMSE solid-state switches.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X500 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X500 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 500 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 SAILF50X500 Is Used
Extended Stroke Hold
Secures vertical loads in the rod-out position during power loss, preventing gravity-driven drops on lifting machinery.
Flow Control Gate
Locks a diverter gate open at the extended end without consuming continuous air pressure, saving energy during long hold times.
Machine Safety Barrier
Holds a protective guard firmly extended until the release air is supplied, ensuring the barrier remains closed during operation.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X500 the Right Lock Cylinder?
Choose this 50mm bore when 982N of thrust at 0.5MPa is sufficient; stepping up to the 63mm bore provides 1559N if your load requires more push force, while dropping to a 40mm bore yields 628N. Select this SAILF configuration when the load must be secured at the extended rod-out position, whereas a SAILB variant holds the retracted end. If your application requires locking at an arbitrary mid-stroke point, the BSAI clamp-lock cylinder is the correct choice instead.
Remember that this is a static holding lock that engages only 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. At 500mm stroke, use a guide to manage side loads. For safety-critical suspended loads, add an independent mechanical safety measure. Replacement requires matching the 50mm bore, 500mm stroke, front locker position, PT port, and mounting style.
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 SAILF50X500 FAQ
At 0.5MPa operating pressure, the SAILF50X500 generates 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 automatically when the piston reaches the extended stroke end, holding the load without live pressure. To unlock, supply air to the release port or use the manual override.
Related AirTAC Lock & Standard Cylinders
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