Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 25mm 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
- Stroke25 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 SAILF80X25S
The AirTAC SAILF80X25-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 engages at the extended stroke end, it securely holds the rod out without relying on live air pressure. In the 80mm bore class, this actuator generates 2513N of push force and 2268N of pull force at 0.5 MPa, utilizing a 25mm carbon steel rod for robust side-load resistance.
This model includes a magnetic piston (-S) for precise position detection with AirTAC CMSE reed or DMSE electronic sensors. A key design detail is the variable air cushion: the locker-end cushion measures 22.5mm, intentionally shorter than the 36mm cushion on the free end, to accommodate the locking mechanism. The lock releases automatically via air pressure or manually via a lever, and the fluid ports feature PT tapered threading.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 25 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 SAILF80X25S Is Used
Extended Load Holding
Maintains a lifted load securely at the extended rod-out position during air pressure loss, preventing sudden drops in vertical lifting fixtures.
End-of-Stroke Clamping
Provides a reliable mechanical lock to hold a workpiece firmly in place once the cylinder reaches its fully extended forward stroke end.
Safety Gate Interlock
Keeps heavy safety gates and machine guards locked open at the extended position until the release air is actively supplied to the front cover.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25S the Right Lock Cylinder?
Choose this 80mm bore when an application demands substantial clamping force at the fully extended position; stepping down to a 63mm bore reduces the 0.5 MPa push force to 1559N. Select the SAILF configuration specifically when the rod-out position must be maintained during a power loss. If your process requires the load to be frozen at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct alternative.
Remember that this front lock provides static holding after the cylinder stops, meaning it does not act as a dynamic brake for a moving rod. Valve selection is critical: avoid fast-exhaust valves and use an independent-exhaust solenoid valve, as back-pressure on the locker side can inadvertently release the lock. For safety-critical lifting applications, always add an independent mechanical safety measure. Replacement parts must match the 80mm bore, 25mm stroke, front locker position, PT ports, and -S magnet specification.
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 SAILF80X25S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa pressure, it achieves a push force of 4523N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides static holding, not dynamic braking, and is released automatically by supplying air to the release port or manually via a lever.
Related AirTAC Lock & Standard Cylinders
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