Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X350S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X350S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 350mm 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
- Stroke350 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 SAILF80X350S
The AirTAC SAILF80X350-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages automatically when the piston reaches the extended stroke end, securely holding the rod-out position without requiring continuous air pressure. It delivers a robust 2513N push force at 0.5MPa and includes a standard magnet for position detection.
Unlike a plain SAI cylinder, this model provides true power-loss safety, though the lock functions strictly as a static holding device at the stroke terminal rather than a mid-stroke clamp. The front locker end features a 22.5mm variable air cushion, which is intentionally shorter than the 36mm cushion on the free end to accommodate the locking hardware. For unlocking, you can supply release air to the dedicated port or use the manual override lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X350S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X350S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 350 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 SAILF80X350S Is Used
Extended Lift Holding
Maintains vertical loads securely at the top of the extended stroke end during a power loss, preventing sudden drops without needing live air pressure.
Safety Gate Lock
Secures access gates or heavy barriers in the open, rod-out position using the spring-applied front lock until air is actively supplied to release it.
Clamp and Hold
Drives a workpiece outward and locks it rigidly at the extended terminal position for machining or inspection processes.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X350S the Right Lock Cylinder?
Choose this 80mm bore when an application requires holding a load at the fully extended position, such as lifting or pushing outward; if your load needs to be secured at the retracted rod-in position, select the SAILB80 variant instead. If the mechanism requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice. Stepping down to a 63mm bore reduces the 0.5MPa push force to 1559N, while a 100mm bore increases it to 3927N.
Because the 350mm stroke amplifies leverage forces, mounting must account for side-load conditions and external guide rails are recommended to prevent premature seal wear. The lock is a static brake that engages only after the cylinder stops; it cannot decelerate a moving rod. Never use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve. For human-safety critical suspended loads, install an independent mechanical safety device. Replacement requires matching the 80mm bore, 350mm stroke, front locker position, 3/8 PT port, and the -S magnet for CMSE reed and DMSE electronic sensors.
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 SAILF80X350S FAQ
At 0.5MPa, the 80mm bore generates a 2513N push force and a 2268N pull force. At the maximum 1.0MPa operating pressure, it achieves a 513kgf maximum thrust.
The lock is spring-applied and air-released, engaging automatically when the piston reaches the extended stroke end to hold the load statically without live pressure. It can be unlocked by supplying release air or using the manual lever; it does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X350S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.