Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 300mm 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.
- BoreØ80 mm
- Stroke300 mm
- Port sizeG3/8
- Lock positionFront cover
- Rod threadM20×1.5
- 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 SAILF80X300S
The AirTAC SAILF80X300-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock housed in the front cover. Because the lock sits forward, it engages when the piston reaches the extended stroke end, making it ideal for safely holding a rod-out load. In the 80mm bore class, this actuator generates 2513N of push thrust and 2268N of pull thrust at 0.5 MPa. The integrated -S magnet supports position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors.
A core distinction of the SAIL series is that the lock provides a static hold only after the rod has stopped at the stroke terminal; it is not a dynamic brake for a moving rod, nor does it clamp at arbitrary mid-stroke positions. The variable air cushion at the locker end is physically shorter (22.5mm) compared to the free end (36mm) to accommodate the locking mechanism. Furthermore, the standard carbon steel rod provides robust side-load resistance, and the extruded aluminum barrel ensures lightweight durability across the 30-800mm/s speed range.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 300 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 (36 mm free end / 22.5 mm lock end) |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SAILF80X300S Is Used
Extended Lift Holding
Secures vertical lifts in the extended position during a power loss, using the front mechanical lock to prevent gravity-driven descent without requiring live air pressure.
Overhead Conveyor Stop
Locks a conveyor diverter or stop gate in the rod-out position to hold items securely at the end of the stroke, ensuring the load remains stationary until an air signal releases the pin.
Safety Guard Positioning
Maintains a machine safety guard fully extended and locked open during maintenance, engaging only after the rod reaches the forward stroke terminal for reliable static holding.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300S the Right Lock Cylinder?
Select this 80mm bore when an application demands robust extended-position holding on power loss, stepping up from a 63mm bore (which provides 1559N push at 0.5 MPa) or stepping down from a 100mm bore (3927N push at 0.5 MPa). Choose this SAILF front-lock configuration to hold the rod in the extended position; if your load must be held retracted, a SAILB back-lock version is required. If the application requires clamping at any intermediate mid-stroke position rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice instead.
When integrating this model, note that the lock holds the load without live air pressure, but safety-critical suspended loads still require an independent mechanical safety measure. A critical valve-selection red-line applies: do not use a fast-exhaust valve with this lock cylinder, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. Because this unit features a 300mm stroke, ensure adequate external guide rails to prevent excessive side-loading on the carbon steel rod. Replacement specifications must match the 80mm bore, 300mm stroke, front locker position, PT tapered port threads, and the -S magnet option.
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 SAILF80X300S FAQ
At 0.5 MPa operating pressure, the 80mm bore generates 2513N of push force and 2268N of pull force. At 0.7 MPa, the push force increases to 3518N.
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, not a dynamic brake, and is released automatically via air pressure or manually via a lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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