Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150 is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 150mm 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
- Stroke150 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 SAILF50X150
The AirTAC SAILF50X150 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, securely holding the rod out without relying on live air pressure. Delivering 982N of push force at 0.5 MPa, it utilizes a carbon steel rod and PT tapered port threads.
Because the lock occupies the front end, the variable air cushion on that side is shortened to 20mm compared to the 30mm cushion on the free end. The lock releases automatically via air supply or manually via a lever, but avoid fast-exhaust valves; back-pressure on the locker side can inadvertently lift the lock pin.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 150 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 SAILF50X150 Is Used
Extended Lift Holding
Maintains a raised platform securely at the extended stroke end during a power loss, preventing unintended descent.
End-of-Stroke Clamping
Secures a workpiece firmly in the extended position without consuming continuous compressed air.
Gate Safety Locking
Keeps heavy safety gates locked open at the full extended position until the release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150 the Right Lock Cylinder?
Choose this 50mm bore when an application requires 982N of thrust at 0.5 MPa, stepping up from a 40mm bore (628N) or down from a 63mm bore (1559N). Select the SAILF front-locker configuration specifically to hold the rod at the extended stroke end. If your process requires clamping at an arbitrary mid-stroke position, the BSAI clamp-lock cylinder is the correct choice instead.
This cylinder provides a static hold after the rod stops, rather than acting as a dynamic brake for a moving load. Always use an independent-exhaust solenoid valve, as shared exhaust back-pressure can release the lock. For safety-critical suspended loads, add an independent mechanical safety measure. Replacement units must match the 50mm bore, 150mm stroke, front lock position, PT ports, and standard mounting interface.
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 SAILF50X150 FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end. It provides a static hold without live pressure, and unlocks via air supply or a manual lever; it does not clamp mid-stroke.
Related AirTAC Lock & Standard Cylinders
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