Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X800S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X800S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 800mm 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
- Stroke800 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 SAILF50X800S
The AirTAC SAILF50X800-S is a double-acting ISO 15552 profile cylinder equipped with a carbon steel piston rod and a magnetic piston for position sensing. It generates 982N of push thrust and 825N of pull thrust at 0.5 MPa. A spring-applied, air-released mechanical lock is built into the front cover, meaning it securely holds the rod at the fully extended stroke end whenever release air is cut, dropping the load safely without relying on live pressure.
Because this is an 800mm stroke, guiding the load is critical to prevent excessive side-loading on the rod seals. Note that the variable air cushion at the locker end is 20mm, intentionally shorter than the 30mm cushion on the free end to accommodate the locking mechanism. The lock releases automatically by supplying air to the release port or manually via the lever. For position detection, the integrated magnet works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X800S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X800S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 800 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 SAILF50X800S Is Used
Extended Load Holding
Maintains vertical loads securely at the full extension stroke end without requiring continuous air pressure, ensuring safety during power loss.
Long-Stroke Material Stop
Acts as a robust 800mm stroke stopper on conveyors, locking outward to hold heavy workpieces stationary at the end of the line.
Safety Gate Interlock
Keeps safety gates and heavy doors firmly open at the extended position, using the mechanical lock to prevent accidental closure.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X800S the Right Lock Cylinder?
Choose this 50mm bore if you need 982N push force at 0.5 MPa; step down to a 40mm bore for 628N, or up to a 63mm bore for 1559N. Select this SAILF front-lock version when your application requires holding the load at the extended rod-out position. If you need to hold the load at the retracted position, choose the SAILB back-lock version instead. If your application requires clamping at an arbitrary mid-stroke point rather than a stroke end, use the BSAI clamp-lock cylinder instead.
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 with this cylinder; back-pressure on the locker side can inadvertently release the lock, so an independent-exhaust solenoid valve is required. If human safety depends on the load staying elevated, add an independent mechanical safety measure. Replacement specs: 50mm bore, 800mm stroke, front lock, PT 1/4 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 SAILF50X800S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push thrust and 825N of pull thrust. At 0.7 MPa, the push force increases to 1374N.
The lock is spring-applied and air-released, holding the rod securely at the extended stroke end only. It engages after the cylinder stops and is not a mid-stroke clamp. You can unlock it automatically by supplying release air or manually using the release lever.
Related AirTAC Lock & Standard Cylinders
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