Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm 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.
- BoreØ100 mm
- Stroke400 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400
The AirTAC SAILF100X400 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed in the front cover. Because the lock is spring-applied and air-released, cutting the release air automatically drives the lock pin into the rod, securely holding the load at the fully extended stroke end without requiring live pressure. In this 100mm bore class, the cylinder generates 3927N of push force and 3681N of pull force at 0.5 MPa, making it well-suited for heavy load manipulation.
A key physical attribute of this SAILF variant is that the variable air cushion at the locker end is notably shorter (24mm) compared to the free end cushion (36mm). The lock itself is a static holding device that engages only after the piston reaches the extended terminal, meaning it will not arrest a moving rod mid-cycle. For position sensing, you can add a magnet (-S) to utilize AirTAC CMSE reed or DMSE solid-state switches along the extruded aluminum barrel grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAILF100X400 Is Used
Extended Load Holding
Maintains vertical loads securely at the extended stroke end on the front cover side, preventing crashes or drops during a complete pneumatic power loss.
Pallet Stop and Hold
Locks a conveyor diverter or stopper block in the extended position without consuming continuous air supply, ensuring the assembly line remains safely blocked during halts.
Overhead Fixture Safety
Keeps heavy machining fixtures raised at the rod-out terminal, utilizing the spring-applied lock to guarantee the workpiece stays elevated even if the main air supply drops.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400 the Right Lock Cylinder?
When deciding between bore sizes, stepping down to an 80mm bore reduces the thrust to 2513N at 0.5 MPa, whereas moving up to a 125mm bore increases push force to 6136N. Choose this SAILF model specifically when you need the load securely held at the extended rod-out position; if your application requires holding at the retracted position, select the SAILB equivalent instead. Furthermore, if your process demands locking at an arbitrary mid-stroke point rather than the stroke terminal, the BSAI clamp-lock cylinder is the correct alternative.
For safe operation, never use a fast-exhaust valve with this lock cylinder; always select an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. Because this model features a 400mm stroke, fitting an external guide is recommended to prevent excessive side-load wear on the rod and seals. Always confirm the exact lock holding-force capacity from the official datasheet, and if human safety depends on the suspended load, implement 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 SAILF100X400 FAQ
At 0.5 MPa operating pressure, the 100mm bore provides 3927N of push force and 3681N of pull force. If you increase the pressure to 0.7 MPa, the push force reaches 5497N.
The lock is spring-applied and air-released, meaning it engages automatically via spring force when the piston reaches the fully extended stroke end. To unlock the rod, you must supply release air to the designated port, though a manual release lever is also available for maintenance.
Related AirTAC Lock & Standard Cylinders
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