Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X300S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X300S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X300S
The AirTAC SAILF100X300-S is a double-acting ISO 15552 profile cylinder equipped with a built-in mechanical lock in the front cover. Because it is an SAILF variant, the spring-applied, air-released lock engages automatically when the piston reaches the extended stroke end, securely holding the rod-out position without requiring live pressure. Generating a robust 5497N of push force at 0.7MPa, this carbon-steel rod unit is designed for heavy-duty holding tasks.
This model includes a magnetic piston (-S) for precise position sensing with AirTAC CMSE reed and DMSE electronic sensors. To accommodate the locking mechanism, the variable air cushion at the locker end is shorter at 24mm compared to the 36mm cushion on the free end. The lock releases automatically via air supply to the release port, or manually via the override lever, ensuring operational flexibility during power loss.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X300S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X300S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 300 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 SAILF100X300S Is Used
Overhead Lift Safety
Holds a lifted load securely at the extended stroke end during power loss, preventing accidental descent.
Pallet Stop Gate
Locks a diverter or stop gate in the rod-out position to halt heavy pallets without consuming continuous air.
Actuated Clamp Hold
Maintains maximum clamping force at the stroke terminal while machinery performs secondary operations.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X300S the Right Lock Cylinder?
Choose this 100mm bore cylinder when an application requires holding a heavy vertical load securely at the fully extended position; if your process demands mid-stroke clamping, select the BSAI clamp-lock cylinder instead. If you need less force, the 80mm bore provides 3518N at 0.7MPa, while stepping up to the 125mm bore yields 8590N. Remember that this SAIL lock provides a static hold only after the rod stops, acting as a power-failure safety rather than a dynamic brake.
When replacing this unit, match the 100mm bore, 300mm stroke, front lock position, 1/2-inch PT port, and the -S magnet option. It supports the full ISO 15552 mounting set including FA, FB, TC, and LB. For a 300mm stroke, adding an external guide is recommended to prevent excessive side-load wear on the seals. Crucially, avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve, and add an independent safety measure if human safety depends on the load staying up.
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 SAILF100X300S FAQ
At 0.7MPa operating pressure, this 100mm bore cylinder generates 5497N of push force and 3681N of pull force. It operates at speeds between 30 and 800mm/s.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end to hold the load statically without live pressure. It unlocks automatically via air supply or manually via a lever; it does not clamp at mid-stroke, and an independent-exhaust solenoid valve must be used to prevent accidental release from back-pressure.
Related AirTAC Lock & Standard Cylinders
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