Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350 is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 350mm 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
- Stroke350 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 SAILF50X350
The AirTAC SAILF50X350 is a double-acting profile cylinder dimensionally interchangeable per ISO 15552, featuring a 50mm bore and 350mm stroke. It integrates a spring-applied, air-released mechanical lock in the front cover that securely holds the rod at the extended stroke end. Delivering 982N of push force at 0.5 MPa, it uses a 1/4 PT port and a 20mm carbon steel rod with M16x1.5 threading.
This unit operates at speeds of 30-800 mm/s and includes variable air cushions at both ends, though the locker-end cushion is notably shorter at 20mm compared to the 30mm free-end cushion. The lock engages statically after the piston stops rather than acting as a dynamic brake, and unlocking is achieved automatically via air supply or manually via the release lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 350 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 SAILF50X350 Is Used
Vertical Lift Hold
Secures elevated loads at the extended stroke end automatically when air pressure drops, preventing sudden falls.
Pallet Stop
Holds a stopped pallet firmly at the extended end position without consuming continuous live air pressure.
Gate Safety
Keeps heavy gates locked open at the full extended stroke until an air signal releases the manual or automatic lock.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X350 the Right Lock Cylinder?
Choose this 50mm bore when you need more force than the 40mm option (628N at 0.5 MPa) but do not require the 1559N thrust of the 63mm version. Select the SAILF configuration specifically when the load must be held at the extended rod-out position, whereas SAILB holds the retracted position. If your application requires locking at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice instead.
For safe operation, never use a fast-exhaust valve with this lock cylinder; an independent-exhaust solenoid valve is required because back-pressure on the locker side can unintentionally release the lock. The lock holds the load without live air pressure, but the air cushion only decelerates the piston near the stroke end and does not provide holding force. Given the 350mm stroke, use appropriate mounting guides to manage side loads. If human safety depends on the load staying extended, add an independent safety measure. Replacement requires matching the 50mm bore, 350mm stroke, front locker, 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 SAILF50X350 FAQ
At 0.5 MPa operating pressure, the SAILF50X350 provides 982N of push force and 825N of pull force. The maximum push force is 1767N at 0.7 MPa.
The spring-applied lock engages automatically when the rod reaches the extended stroke end, holding the load statically without live air. It is released 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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