Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50S 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 SAILF80X50S
The AirTAC SAILF80X50-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. It provides 2513N of push force and 2268N of pull force at 0.5 MPa, utilizing a 25mm carbon steel rod. The lock is spring-applied and air-released, meaning it engages automatically when the piston reaches the extended stroke end to secure the load without requiring continuous live pressure.
This model includes a magnetic piston (-S) for position detection using CMSE reed or DMSE electronic solid-state sensors. Because the front cover houses the locking mechanism, the variable air cushion at that end is shorter (22.5mm) compared to the standard 36mm cushion on the back end. You can unlock the rod automatically by supplying release air to the port or by using the manual override lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50S |
|---|---|
| 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 SAILF80X50S Is Used
Vertical Lift Hold
Secures an extended vertical load at the top stroke end instantly upon loss of air pressure, preventing sudden drops.
Pallet Stopper
Extends to halt heavy pallets on a line and locks in the extended position so the rod absorbs no continuous impact force.
Safety Gate Hold
Keeps a protective machine guard open and rigidly fixed at the end of the stroke without needing constant air supply.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X50S the Right Lock Cylinder?
Choose this 80mm bore when an application requires 2513N of push force at 0.5 MPa, stepping down to a 63mm bore (1559N push) if the load is lighter, or up to a 100mm bore (3927N push) for heavier demands. Select the SAILF configuration when the load must be held securely at the extended rod-out position; choose SAILB if the retracted position needs holding. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, use the BSAI clamp-lock cylinder instead.
Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Valve selection is critical: never use a fast-exhaust valve with this unit, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. For any safety-critical lifting application, add an independent mechanical safety measure. To replace this unit, match the 80mm bore, 50mm stroke, front lock position, PT tapered ports, 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 SAILF80X50S FAQ
At 0.5 MPa, 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. It engages automatically when the piston reaches the extended stroke end in the front cover, holding the load statically without live pressure. It unlocks by supplying release air or via the manual lever, but it cannot clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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