Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 500mm 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
- Stroke500 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 SAILF80X500S
The AirTAC SAILF80X500-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because it is an F-model, the spring-applied, air-released lock engages when the rod reaches the extended stroke end, securely holding the load without requiring live air pressure. In the 80mm bore class, it generates 2513N of push force and 2268N of pull force at 0.5 MPa. A carbon steel piston rod handles high side-load stresses, while the integrated magnet supports position sensing via AirTAC CMSE reed or DMSE electronic switches.
This model features PT tapered port threads and variable air cushions at both ends. A notable design trait is that the cushion at the locker end is shorter (22.5mm) compared to the free end (36mm). The lock is a static holding device, not a dynamic brake; it engages after the cylinder stops. For unlocking, you can supply air to the release port for automatic operation or use the manual release lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 500 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 SAILF80X500S Is Used
Extended Lift Holding
Secures vertical lifts at the top stroke end. The spring-applied lock engages automatically upon reaching the extended position, preventing falls during power loss.
Pallet Stop Gate
Holds a conveyor pallet at the extended end-of-stroke. The air-released lock maintains the blocking position without consuming continuous compressed air.
Safety Guard Positioning
Keeps a machine safety guard fully open and locked. The manual release lever allows operators to safely disengage the lock during maintenance procedures.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X500S the Right Lock Cylinder?
Choose this 80mm bore if your application requires the 2513N push force at 0.5 MPa; step down to a 63mm bore for 1559N, or up to a 100mm bore for 3927N. Select this SAILF variant when you need the load held at the extended rod-out position, and choose SAILB if the retracted position must be secured. If your process demands clamping at an arbitrary mid-stroke point rather than the stroke end, the AirTAC BSAI clamp-lock cylinder is the correct choice instead.
When integrating this lock cylinder, avoid using fast-exhaust valves, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. Because this unit features a 500mm stroke, adding external guide rails is recommended to prevent excessive side-loading on the rod. If human safety depends on the load remaining extended, add an independent mechanical safety measure as well. Replacement units must match the 80mm bore, 500mm stroke, front locker position, PT port thread, 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 SAILF80X500S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 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 after the rod stops, not a dynamic brake. You can unlock it automatically by supplying air to the release port or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
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