Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 25mm 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
- Stroke25 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 SAILF80X25
The AirTAC SAILF80X25 is a double-acting ISO 15552 profile cylinder featuring 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 safely holds the rod-out position without requiring live air pressure. In this 80 mm bore class, the cylinder generates 3518 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa.
The integrated lock differentiates this unit from a standard SAI profile cylinder, providing true static load holding rather than relying solely on the variable air cushions. Notably, the cushion at the locker end is physically shorter (22.5 mm) compared to the free end (36 mm) to accommodate the locking hardware. The carbon steel rod uses an M20x1.5 thread, and the body features sensor grooves compatible with AirTAC CMSE reed and DMSE electronic switches if a magnet is added later.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 25 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 SAILF80X25 Is Used
Extended Lift Holding
Maintains a vertical load securely at the fully extended stroke end during a power loss, preventing sudden drops without needing continuous air pressure.
Out-Stroke Clamp Lock
Secures a workpiece or gate at the rod-out position, using the spring-applied lock to keep the load firmly held until the release air is supplied.
Safety Gate Interlock
Provides a fail-safe hold for open safety guards or gates at the end of the extension stroke, ensuring the barrier remains in place until actively unlocked.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X25 the Right Lock Cylinder?
Select this 80 mm bore cylinder when an application requires securing a load safely at the fully extended rod-out position. If your system requires less force, stepping down to a 63 mm bore yields 2182 N of push force at 0.5 MPa; for heavier loads, a 100 mm bore provides 5497 N. Choose the SAILF configuration specifically when the extended end must be held, and select SAILB if the retracted end requires holding. If you need to clamp the rod at an arbitrary mid-stroke position rather than a stroke end, the BSAI clamp-lock cylinder is the correct choice instead.
Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Pneumatic valve selection is critical: never use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can inadvertently release the lock. Always utilize an independent-exhaust solenoid valve. For any safety-critical lifting application where human safety depends on the load staying extended, add an independent mechanical safety measure as well. Replacement specifications must match the 80 mm bore, 25 mm stroke, front locker position, 3/8 PT port, and desired mounting style (Basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1, or 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 SAILF80X25 FAQ
The 80 mm bore generates a push force of 3518 N at 0.5 MPa and 4523 N at 0.9 MPa. The pull force is 2268 N at 0.5 MPa. Maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end. It provides a static hold, not a dynamic brake. You can unlock it automatically by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
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