Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X250S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X250S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 250mm 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
- Stroke250 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X250S
The AirTAC SAILF100X250-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because this is a SAILF model, the spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the rod out without requiring live pressure. Delivering 5497N of push force at 0.7MPa, it provides robust load handling for heavy automation tasks.
This unit includes a magnetic piston for position sensing with CMSE reed and DMSE electronic switches. The variable air cushion at the locker end is shorter at 24mm compared to the free end at 36mm, ensuring compact deceleration without interfering with the lock mechanism. The standard carbon steel rod offers high tensile strength for demanding industrial environments.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X250S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X250S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 250 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 SAILF100X250S Is Used
Extended Load Holding
Maintains vertical loads in the extended position during power loss, preventing gravity-induced drops.
Pneumatic Stopper Gate
Holds a raised stopper pin at the extended stroke end to halt heavy pallets on packaging lines.
Safety Barrier Actuation
Keeps machine safety gates locked in the open, extended position until release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF100X250S the Right Lock Cylinder?
Choose this 100mm bore cylinder when your application requires 5497N push force at 0.7MPa and needs the load held securely at the extended stroke end. If your force requirements are lower, the 80mm bore provides 3518N at 0.7MPa; if you need more power, the 125mm bore offers 8590N. Select SAILF to hold the rod in the extended position, and SAILB to hold it retracted. If you need to arrest the load at an arbitrary mid-stroke position rather than the stroke terminal, select the BSAI clamp-lock cylinder instead.
The SAILF 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 lock cylinder, as back-pressure on the locker side can accidentally release the lock; always use an independent-exhaust solenoid valve. For human safety or lifting applications where failure is critical, add an independent safety measure. To replace this unit, match the 100mm bore, 250mm 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 SAILF100X250S FAQ
At 0.7MPa operating pressure, this 100mm bore cylinder provides 5497N of push force and 3681N of pull force. It can achieve a maximum push force of 7068N at 0.9MPa.
The lock is spring-applied and air-released. It engages automatically when the piston reaches the extended stroke end, holding the rod without live pressure. To unlock, supply air to the release port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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