Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X700S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X700S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 700mm 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
- Stroke700 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 SAILF50X700S
The AirTAC SAILF50X700-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages to hold the rod securely at the extended stroke end, dropping live air pressure entirely to maintain the load. In the 50mm bore class, it generates 982N of push force and 825N of pull force at 0.5 MPa. A carbon steel piston rod provides durable, standard side-load resistance.
Because the lock occupies the front cover, the variable air cushion at that locker end is physically shorter (20mm) compared to the 30mm cushion on the free end. This model includes a magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches. Operating speed ranges from 30-800 mm/s, making it highly responsive for end-of-stroke holding tasks.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X700S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X700S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 700 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 SAILF50X700S Is Used
Vertical Lift Hold
Maintains an elevated load at the extended stroke end during a complete air pressure loss, preventing sudden drops in lifting jigs.
Extended Gate Lock
Secures a diverter gate in the open position without consuming live air, releasing automatically only when control air is restored.
Safety Interlock
Keeps a protective guard firmly extended until the system actively supplies release air, serving as a reliable static safety barrier.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X700S the Right Lock Cylinder?
Select this 50mm bore when an application demands 982N push force at 0.5 MPa with a guaranteed mechanical hold at the extended position. If your load requires less force, stepping down is not an option in this series (SAIL has no 32mm bore), but if you need substantially more holding power, the 63mm bore offers 1559N. Choose this SAILF configuration specifically when the extended rod-out position must be maintained; for retracted holds, a SAILB is required. If the mechanism must freeze at an arbitrary mid-stroke point rather than the end, select a BSAI clamp-lock cylinder instead.
The lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Pneumatic routing is critical: do not use a fast-exhaust valve, as back-pressure on the locker side can inadvertently release the lock—always use an independent-exhaust solenoid valve. For human-safety-dependent lifted loads, add an independent mechanical safety measure. At 700mm of stroke, ensure external guide rails are used to prevent rod binding and excessive side-loading. Replacement match: 50mm bore, 700mm stroke, front lock, PT tapered ports, -S magnet.
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 SAILF50X700S 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, holding the rod statically at the extended stroke end without live pressure. It unlocks automatically via air supply or manually via a lever, but it cannot clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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