Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X100
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X100 is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 100mm 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.
- BoreØ40 mm
- Stroke100 mm
- Port sizeG1/4
- Lock positionFront cover
- Rod threadM12×1.25
- 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 SAILF40X100
The AirTAC SAILF40X100 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. A spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the rod-out position without requiring live pressure. Delivering 879N of push force at 0.7 MPa, it is dimensionally interchangeable with ISO 15552 cylinders while adding critical power-loss safety.
The lock releases automatically by supplying air to the release port or manually via a lever. Unlike a plain SAI, the locker-end air cushion is notably shorter at 20 mm compared to the 27 mm free-end cushion. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X100 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X100 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 100 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (27 mm free end / 20 mm lock end) |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SAILF40X100 Is Used
Extended Load Holding
Maintains the rod-out position during power loss to prevent vertical loads from collapsing.
Safety Gate Hold
Secures access gates and guards in the open position until air is actively supplied to release.
End-of-Stroke Clamp
Keeps a workpiece clamped at the full extension point without consuming continuous air pressure.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X100 the Right Lock Cylinder?
Choose this 40 mm bore when your application requires safely holding a load at the fully extended rod-out position. If you need higher force, stepping up to the 50 mm bore provides 1374N of push at 0.7 MPa. Select SAILF for front-cover locking at the extended end, or SAILB if you need to hold the retracted position. For locking at an arbitrary mid-stroke point, use a BSAI clamp-lock cylinder instead.
Remember that this is a static holding lock that engages after the cylinder stops, not a dynamic brake. Always use an independent-exhaust solenoid valve, as back-pressure can lift the lock. If human safety depends on the load staying extended, add an independent safety measure. Replacement matches require a 40 mm bore, 100 mm stroke, front locker position, PT port threads, and standard carbon steel rod.
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 SAILF40X100 FAQ
At 0.7 MPa, the push force is 879N and the pull force is 528N. At 0.9 MPa, the push force reaches 1130N.
The lock is spring-applied and air-released. It engages statically at the extended stroke end to hold the load. Unlock it automatically via the release port or manually using the lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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