Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X400S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X400S is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 400mm 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
- Stroke400 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 SAILF80X400S
The AirTAC SAILF80X400-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 when the piston reaches the extended stroke end, it secures the rod-out position and holds the load without requiring live pressure. At 0.5 MPa this 80 mm bore generates 2513 N of push force and 2268 N of pull force, utilizing a 25 mm carbon steel rod with an M20x1.5 thread.
This model includes a magnet for position sensing using CMSE reed or DMSE solid-state switches. The variable air cushion decelerates the load near the stroke terminals, but note that the cushion at the locker end is shorter at 22.5 mm compared to 36 mm on the free end. The lock is a static holding device, not a dynamic brake, and operates via automatic air release or a manual lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X400S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X400S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 400 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 SAILF80X400S Is Used
Extended Load Holding
Secures a vertical load in the rod-out position on the front lock during a power loss, preventing sudden drops.
End-of-Stroke Clamp
Holds a workpiece firmly at the extended stroke end without consuming compressed air during the hold.
Gate Safety Lock
Keeps a safety gate locked open at the full extension until an air signal releases the pin.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X400S the Right Lock Cylinder?
Choose this 80 mm bore when an application demands 2513 N of push force at 0.5 MPa, stepping down to the 63 mm bore (1559 N) if the load is lighter, or up to the 100 mm bore (3927 N) for heavier demands. Select this SAILF variant when the load must be secured at the extended rod-out position, whereas a SAILB model holds the retracted position. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice.
For a direct replacement, match the 80 mm bore, 400 mm stroke, front locker position, 3/8 PT port, and the -S magnet option. Because the stroke is 400 mm, fitting an external guide is recommended to prevent excessive side loads on the rod. Remember that this lock holds statically after the cylinder stops; avoid using a fast-exhaust valve and use an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. For human safety, always add an independent mechanical safety measure.
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 SAILF80X400S FAQ
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At 0.7 MPa, the push force is 3518 N. The maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, engaging statically when the rod reaches the extended stroke end. It does not clamp at mid-stroke. To unlock, supply air to the release port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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