Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 125mm 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.
- BoreØ80 mm
- Stroke125 mm
- Port sizeG3/8
- Lock positionFront cover
- Rod threadM20×1.5
- UnlockAir + manual
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125
The AirTAC SAILF80X125 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. Because the lock engages at the extended stroke end, it secures the rod-out position and holds the load without requiring continuous live air pressure. In the 80 mm bore class, this actuator generates 2513 N of push force and 2268 N of pull force at 0.5 MPa, utilizing a 25 mm carbon steel rod for robust side-load resistance.
The lock is a static holding device, not a dynamic brake for moving rods. It releases automatically via air supply to the release port or manually via a lever. Note that the variable air cushion at the locker end is 22.5 mm, intentionally shorter than the 36 mm cushion at the free end to accommodate the locking mechanism. For position sensing, adding a magnet allows the use of AirTAC CMSE reed or DMSE electronic solid-state switches in the dual sensor grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 125 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| 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 / 22.5 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SAILF80X125 Is Used
Extended Load Holding
Secures vertical lifts in the rod-out position during power loss, preventing gravity-driven drops.
Safety Gate Locking
Maintains a positive mechanical stop for heavy safety gates at full extension without consuming air.
End-of-Stroke Clamping
Holds workpieces firmly at the front stroke terminal for machining or welding operations.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X125 the Right Lock Cylinder?
Choose this 80 mm bore when an application requires 2513 N push force at 0.5 MPa; step down to a 63 mm bore (1559 N push) for lighter loads, or up to a 100 mm bore (3927 N push) if higher thrust is needed. Select the SAILF configuration specifically when the load must be held safely at the extended rod-out position; choose SAILB instead if the retracted position requires holding. If the application demands clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice.
Ensure the lock functions reliably by avoiding fast-exhaust valves; use an independent-exhaust solenoid valve, as back-pressure on the locker side can inadvertently release the lock. For any safety-critical lifting application, always add an independent mechanical safety measure. Replacement specifications must match the 80 mm bore, 125 mm stroke, front locker position, PT tapered port threads, and standard carbon steel rod. The operating speed range is 30-800 mm/s.
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 SAILF80X125 FAQ
At 0.5 MPa operating pressure, the 80 mm bore provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The lock is spring-applied and air-released, engaging only at the extended stroke end to hold the load statically without live pressure. It unlocks via air supply to the release port or a manual lever, but it is not a mid-stroke clamp or a dynamic brake.
Related AirTAC Lock & Standard Cylinders
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