Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 80mm 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.
- BoreØ50 mm
- Stroke80 mm
- Port sizeG1/4
- Lock positionFront cover
- Rod threadM16×1.5
- 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 SAILF50X80S
The AirTAC SAILF50X80-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. It safely holds the rod at the fully extended stroke end, delivering 982N of push force at 0.5 MPa. A carbon steel piston rod provides durable operation, and the integrated -S magnet enables position sensing with CMSE reed or DMSE electronic switches.
Because the lock engages only at the stroke terminal, the front-end air cushion is intentionally shorter (20mm) than the free end (30mm). The lock holds statically after the cylinder stops; it is not a mid-stroke clamp or a dynamic brake for a moving rod. You can release the lock automatically via an air release port or manually via the lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 80 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (30 mm free end / 20 mm lock end) |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SAILF50X80S Is Used
Vertical Lift Holding
Secures a raised vertical load at the extended stroke end, preventing falls during a sudden power or air loss.
Safety Gate Lock
Keeps a heavy guard or gate firmly open at the rod-out terminal until the release air is actively supplied.
Extended Clamp Hold
Maintains clamping pressure on a part at the stroke end without consuming continuous compressed air.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X80S the Right Lock Cylinder?
Choose this 50mm bore when an application requires safely maintaining an extended load without continuous air pressure; if you need less force, the 40mm bore provides 628N, while stepping up to 63mm yields 1559N. Select this SAILF variant to hold the rod-out position; choose SAILB to hold the retracted position instead. If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, use the BSAI clamp-lock cylinder instead.
For reliable operation, do not use a fast-exhaust valve, as back-pressure on the locker side can inadvertently release the lock; use an independent-exhaust solenoid valve. If human safety depends on the load staying extended, add an independent mechanical safety measure. Replacement specifications: 50mm bore, 80mm stroke, front lock, PT tapered port threads, and standard mounting options including FA, FB, LB, and TC.
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 SAILF50X80S FAQ
At 0.5 MPa, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
The lock is spring-applied and air-released, engaging only when the rod reaches the fully extended stroke end. It provides a static hold, not a dynamic brake. Unlock it automatically by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
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