Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000S is a genuine double-acting ISO 15552 profile cylinder with a Ø125mm bore, 1000mm 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.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM27×2
- UnlockAir + manual
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000S
The AirTAC SAILF125X1000-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because this is a SAILF variant, the spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the rod out without requiring live pressure. At 0.7 MPa it generates 8590 N of push force, making it suited for heavy load manipulation.
This unit includes a -S magnet for position detection via CMSE reed or DMSE solid-state sensors. Note that the variable air cushion at the locker end is 24 mm, which is shorter than the 40 mm cushion on the free end. Also, as a 1000 mm stroke exceeds the 1500 mm standard maximum for this bore, it is built as a non-standard configuration, requiring external guide rods to prevent excessive side-loading on the long piston rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø125 mm |
| Stroke | 1000 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable (40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 SAILF125X1000S Is Used
Extended Load Holding
Maintains heavy lifted loads in the fully extended position safely during compressed air loss.
Long-Stroke Gating
Secures large gates or diverters at the end of the 1000 mm travel without continuous air consumption.
Heavy Clamp and Hold
Provides a reliable static hold at the extended stroke end for heavy industrial clamping tasks.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000S the Right Lock Cylinder?
Choose this 125 mm bore cylinder when an application requires holding a heavy load at the fully extended position; if less force is needed, an 80 mm bore provides 3518 N at 0.7 MPa. Select SAILF over SAILB specifically when the extended rod-out position must be maintained during a power loss. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, select the BSAI clamp-lock cylinder instead.
Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. For safety-critical suspended loads, always add an independent mechanical safety measure. Replacement specifications: 125 mm bore, 1000 mm stroke, front lock, PT 1/2 port, -S magnet, and standard ISO 15552 mounting options.
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 SAILF125X1000S FAQ
At 0.5 MPa, the push force is 6136 N and the pull force is 5734 N. At 0.7 MPa, it provides 8590 N of push force, and up to 11045 N at 0.9 MPa.
The lock is spring-applied and air-released, engaging statically when the piston reaches the extended stroke end. It does not clamp at mid-stroke. To unlock, supply air to the release port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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