Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X1000S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X1000S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm 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.
- BoreØ50 mm
- Stroke1000 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 SAILF50X1000S
The AirTAC SAILF50X1000-S is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock housed in the front cover. Because the lock sits in the front, it engages when the piston reaches the extended stroke end, securely holding the rod-out position. In the 50mm bore class, this actuator generates 982N of push force and 825N of pull force at 0.5 MPa, utilizing a 20mm carbon steel rod and PT threaded 1/4 ports. An integrated magnet enables position sensing via AirTAC CMSE reed or DMSE electronic switches.
This model features a variable air cushion at both ends, though the cushion length at the locker end is notably shorter (20mm) than the free end (30mm) to accommodate the locking mechanism. The lock functions as a static holding device that engages only after the cylinder has stopped at the stroke terminal; it is not a dynamic brake for a moving rod. To maintain safety, exhaust air must be controlled properly, as back-pressure on the locker side can inadvertently release the lock.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X1000S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X1000S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 1000 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 SAILF50X1000S Is Used
Extended Lift Holding
Maintains a vertical lift securely in the rod-out position during a power loss, utilizing the front cover spring-applied lock to prevent gravity-driven drops.
Long-Stroke Gate Actuation
Drives a 1000mm stroke diverter gate to the extended open state and holds it there pneumatically or manually without requiring constant live air pressure.
Clamp and Hold at Stroke End
Extends to clamp a workpiece at the end of the stroke, where the mechanical lock takes over to sustain the clamping force safely during machine idle periods.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X1000S the Right Lock Cylinder?
Select this 1000mm stroke model when an application requires holding a load securely at the fully extended position without relying on continuous air pressure. If your system requires less force, the 40mm bore provides 628N push at 0.5 MPa; for heavier loads, stepping up to the 63mm bore yields 1559N. If the load must be clamped and held at an arbitrary mid-stroke position rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice instead of SAIL. If human safety depends on the load staying extended, always add an independent mechanical safety measure beyond the pneumatic lock.
When replacing this unit, verify the 50mm bore, 1000mm stroke, front locker position (F), PT port threads, and the -S magnet option. Because this is a 1000mm stroke—exceeding typical lengths—a side-load guide should be used to prevent rod deflection and premature seal wear. Furthermore, avoid using fast-exhaust valves with this cylinder; an independent-exhaust solenoid valve is required to prevent back-pressure from lifting the lock.
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 SAILF50X1000S FAQ
At 0.5 MPa operating pressure, the 50mm bore 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 statically when the rod reaches the fully extended stroke end. It unlocks automatically via air supply to the release port or via a manual release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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