Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400S 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 SAILF100X400S
The AirTAC SAILF100X400-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. This lock engages automatically when the piston reaches the extended stroke end, securely holding the rod-out position without requiring live air pressure. With a robust 100mm bore, it generates 5497N of push force at 0.7 MPa, making it highly capable for substantial load-holding tasks.
Because the lock occupies the front end, the variable air cushion on that side is shorter at 24mm compared to the 36mm cushion on the free end. The standard carbon steel rod provides excellent durability, and the integrated -S magnet allows for direct position sensing using AirTAC CMSE reed or DMSE electronic solid-state switches.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400S |
|---|---|
| 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 SAILF100X400S Is Used
Extended Load Holding
Holds a lifted platform securely at the extended rod-out position during power loss, preventing sudden drops.
Clamp and Secure
Maintains clamping force on a workpiece at the stroke end without continuously consuming compressed air.
Gate Safety Lock
Keeps heavy safety gates locked in the open, extended position until the release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X400S the Right Lock Cylinder?
Select this 100mm bore model when your application requires holding a heavy load at the rod-out extended position, such as a raised platform or actuated gate. If your force requirements are lower, the 80mm bore offers 3518N of push force at 0.7 MPa; if you need more power, the 125mm bore provides 8590N. Choose the SAILF configuration specifically when the extended end must be secured on power loss, whereas a SAILB variant holds the retracted position.
Remember that this SAIL lock is a static holding device that engages only after the cylinder stops at the stroke end; it is not a dynamic brake for a moving rod, nor does it clamp at arbitrary mid-stroke positions (for that, use the BSAI clamp-lock cylinder). Avoid using fast-exhaust valves with this cylinder, as back-pressure on the locker side can inadvertently release the lock; instead, use an independent-exhaust solenoid valve. For safety-critical suspended loads, always add an independent mechanical safety measure. At 400mm stroke, ensure external guide rails are used to prevent excessive side-loading on the rod. Replacement matches require the exact 100mm bore, 400mm stroke, front locker position, PT port threads, and the -S magnet option.
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 SAILF100X400S FAQ
At 0.7 MPa operating pressure, the 100mm bore generates 5497N of push force and 3681N of pull force. The maximum operating pressure is 1.0 MPa, yielding 7068N of push force.
The lock is spring-applied and air-released, engaging only at the extended stroke end to hold the load statically without live pressure. To unlock, supply air to the release port or use the manual release lever. It does not clamp mid-stroke; for any-position locking, use the BSAI cylinder.
Related AirTAC Lock & Standard Cylinders
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