Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 50mm 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
- Stroke50 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 SAILF80X50
The AirTAC SAILF80X50 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 rod, securely holding the load at the extended stroke end without relying on live pressure. In the 80mm bore class, it generates 2513N of push force and 2268N of pull force at 0.5MPa, making it well-suited for heavy load control.
This unit features a standard carbon steel rod and PT tapered ports. A key design detail is that the variable air cushion at the locker end is shorter (22.5mm) than the free end cushion (36mm), ensuring the deceleration does not interfere with the locking mechanism. The lock engages only after the piston stops at the stroke terminal; it is a static holding device, not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAILF80X50 Is Used
Extended Load Holding
Maintains vertical loads securely in the extended position during power loss, preventing sudden drops on lifts and elevating platforms.
Clamp and Hold
Secures a workpiece at the end of the stroke without consuming continuous air, providing reliable pressure maintenance during machining.
Safety Gate Lock
Keeps heavy safety gates and access barriers locked in the open extended state until an air signal deliberately releases the mechanism.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50 the Right Lock Cylinder?
Choose this 80mm bore when the 50mm bore (982N push at 0.5MPa) lacks the necessary thrust, but the 100mm bore (3927N at 0.5MPa) would be oversized. Select this SAILF configuration specifically when the load must be held securely in the extended rod-out position. If your application requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice instead.
For safe load holding, never use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. The lock holds statically at the stroke end, so if human safety depends on the load staying up, add an independent safety measure. To replace this unit, match the 80mm bore, 50mm stroke, front locker position, PT port threads, and standard mounting options (Basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1, TCM2).
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 SAILF80X50 FAQ
At 0.5MPa operating pressure, the 80mm bore provides 2513N of push force and 2268N of pull force. At 0.7MPa, the push force increases to 3518N.
The lock is spring-applied and air-released, holding the rod statically at the extended stroke end. It engages automatically when pressure is cut, and unlocks via an air signal or manual release lever. It does not lock at mid-stroke.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.