Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150S 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 SAILF50X150S
The AirTAC SAILF50X150-S is a double-acting ISO 15552 profile cylinder featuring a built-in 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 20mm carbon steel rod, securely holding the load at the extended stroke end without maintaining live pressure. This 50mm bore generates 982N of push force and 825N of pull force at 0.5 MPa, making it highly capable for mid-weight holding tasks. You can release the lock automatically by supplying air to the release port or by using the manual release lever.
This model includes a magnetic piston (-S) for electronic DMSE solid-state sensors and CMSE reed switches, which mount directly into the extruded aluminum barrel's sensor groove. A vital design detail is that the variable air cushion at the locker end is 20mm, intentionally shorter than the 30mm cushion at the free end to accommodate the locking mechanism. Remember that the cushion only decelerates the piston near stroke end; the mechanical lock is what actually secures the load.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150S |
|---|---|
| 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 SAILF50X150S Is Used
Extended Load Holding
Maintains a vertical load in the extended rod-out position during a power loss, using the spring-applied front lock to prevent sudden drops.
Pneumatic Stop Gate
Holds a conveyor flow gate open at the stroke end without consuming air, releasing automatically only when the control system supplies release air.
Safety Guard Hold
Keeps a machine safety guard open and locked in the extended position, requiring a deliberate air signal or manual lever override to close.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X150S the Right Lock Cylinder?
Select this 50mm bore cylinder when an application requires 982N push force at 0.5 MPa and needs to hold a load securely at the extended stroke end. If your project demands less force, the 40mm bore provides 628N push at 0.5 MPa, whereas stepping up to the 63mm bore yields 1559N. Choose this SAILF front-lock version to hold the rod-out position; if you need to hold the retracted position, select the SAILB back-lock version instead. Crucially, the SAIL lock is a static holding device that engages only after the cylinder stops, not a dynamic brake for a moving rod.
If your machinery requires locking at an arbitrary mid-stroke position rather than the stroke end, you must use the BSAI clamp-lock cylinder instead. For safe operation, never use a fast-exhaust valve with this lock cylinder; always use an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. For safety-critical lifting applications, add an independent safety measure as well. This configuration features a 1/4 PT port, standard 150mm stroke, and accepts the full range of ISO 15552 mountings including FA, FB, CA, CB, LB, and TC.
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 SAILF50X150S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At the maximum 1.0 MPa pressure, it achieves up to 200 kgf.
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 after the cylinder stops, and can be unlocked automatically via air pressure or manually via a lever.
Related AirTAC Lock & Standard Cylinders
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