Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X25
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X25 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm 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.
- BoreØ100 mm
- Stroke25 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X25
The AirTAC SAILF100X25 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This built-in lock engages automatically to hold the rod securely at the extended stroke end whenever the release air is cut, maintaining the load position without requiring continuous live pressure. In the 100mm bore class, it generates a substantial 3927N of push force and 3681N of pull force at a 0.5MPa operating pressure, making it well-suited for heavy-duty positioning tasks.
Because the lock occupies the front end cover, the variable air cushion on that locker side is engineered shorter at 24mm compared to the 36mm cushion length on the free end. The cylinder operates efficiently within a speed range of 30-800mm/s and utilizes a PT port thread type. For position sensing, the barrel features dual sensor grooves ready to accept AirTAC CMSE reed or DMSE electronic solid-state switches if a magnet is specified.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X25 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X25 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 25 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| 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 / 24 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SAILF100X25 Is Used
Overhead Lift Safety
Secures elevated heavy loads at the extended stroke end instantly upon air pressure loss, preventing sudden drops in lifting machinery.
Power Failure Hold
Maintains a firmly clamped position on heavy assemblies during power outages without needing continuous air supply.
Heavy Gate Control
Holds large industrial gates or heavy barriers open at the full extended position, resisting external forces until unlocked.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X25 the Right Lock Cylinder?
Choose this 100mm bore when the 80mm bore (providing 2513N push at 0.5MPa) lacks the necessary thrust, but the 125mm bore (6136N push) would be excessive overkill. Select the SAILF configuration specifically when the load must be held safely at the extended rod-out position; conversely, choose SAILB for holding at the retracted rod-in position. If your application requires clamping at an arbitrary mid-stroke point rather than at the stroke terminal, the BSAI clamp-lock cylinder is the correct alternative.
Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Never use a fast-exhaust valve with this cylinder; always select an independent-exhaust solenoid valve, as back-pressure on the locker side can inadvertently release the lock. For any application where human safety depends on the load remaining elevated, always add an independent secondary safety measure. Replacement matches require the exact 100mm bore, 25mm stroke, front locker position, PT port, and appropriate mounting from the ISO 15552 interchangeable set.
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 SAILF100X25 FAQ
At a 0.5MPa operating pressure, the 100mm bore generates 3927N of push force and 3681N of pull force. At the maximum 1.0MPa operating pressure, the push force reaches 801kgf.
The lock is spring-applied and air-released, securely holding the rod at the extended stroke end when air is cut. It unlocks automatically via air supply to the release port or manually via a lever, but it only engages statically after the rod stops, not as a mid-stroke clamp.
Related AirTAC Lock & Standard Cylinders
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