Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 300mm 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
- Stroke300 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 SAILF80X300
The AirTAC SAILF80X300 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed in the front cover. This spring-applied, air-released mechanism engages automatically when the piston reaches the extended stroke end, securely holding the load without requiring continuous live air pressure. Delivering a push force of 2513N at 0.5MPa, it uses a 25mm carbon steel rod and PT threaded ports.
Because the lock occupies the front end, the variable air cushion on that side is physically shorter at 22.5mm compared to the 36mm cushion on the free back end. The lock is a strictly static holding device that engages after the rod stops; it will not brake a moving piston. For position sensing, adding a magnet allows the use of AirTAC CMSE reed or DMSE electronic sensors in the dual side grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 300 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 SAILF80X300 Is Used
Overhead Lift Hold
Secures an extended vertical lift arm instantly upon air loss, preventing a suspended payload from dropping during a power failure.
Divert Gate Lock
Holds an extended conveyor divert gate rigidly in place against side impact forces without consuming continuous compressed air.
Press Sub-Assembly
Maintains an extended tooling head securely at the out-stroke end while operators load components into the work fixture.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X300 the Right Lock Cylinder?
Choose this 80mm bore when your application requires 2513N of push force at 0.5MPa, stepping down from the 100mm bore which offers 3927N, or up from the 63mm bore which provides 1559N. Select the SAILF configuration specifically when the load must be secured at the extended rod-out position; choose SAILB instead if the retracted position needs holding. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct alternative.
For safe operation, never use a fast-exhaust valve with this lock cylinder; always use an independent-exhaust solenoid valve because back-pressure on the locker side can unintentionally release the lock. At 300mm stroke, the 25mm rod demands proper guide support to prevent excessive side-loading and premature seal wear. When replacing this unit, match the 80mm bore, 300mm stroke, front locker position, PT port threads, and standard mounting options like FA, FB, or TC. If human safety depends on the load remaining extended, always add 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 SAILF80X300 FAQ
At a 0.5MPa operating pressure, the SAILF80X300 provides a push force of 2513N and a pull force of 2268N. At 0.7MPa, the push force increases to 3518N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold after the rod stops, not a dynamic brake, and can be unlocked automatically via air supply or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
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