Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm bore, 175mm 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
- Stroke175 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 SAILF50X175S
The AirTAC SAILF50X175-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because the lock is spring-applied and air-released, cutting the release air drives a lock pin into the rod to securely hold the load at the extended stroke end without requiring live pressure. In this 50mm bore class, the cylinder provides 982N of push force and 825N of pull force at 0.5 MPa. You can unlock the rod automatically by supplying air to the release port or by using the manual release lever.
This front-locker configuration features a standard carbon steel rod and includes a piston magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE solid-state sensors. To accommodate the locking hardware, the variable air cushion at the locker end is shorter than the cushion at the free end. The lock is a static holding device that engages after the piston stops; it is not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 175 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 SAILF50X175S Is Used
Extended Load Holding
Maintains vertical loads securely in the extended position during a power loss or air pressure drop.
Safety Gate Hold
Keeps protective gates and barriers locked in the open, extended position until the release air is restored.
Clamp and Hold
Secures a workpiece at the end of the extension stroke, allowing the machine to cycle safely without live air pressure.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175S the Right Lock Cylinder?
Choose this 50mm bore cylinder when your application requires holding a load securely at the extended rod-out position. If you need to hold the load at the retracted rod-in position instead, select the SAILB variant. For applications where the load must be clamped and held at an arbitrary mid-stroke point rather than a stroke end, the AirTAC BSAI clamp-lock cylinder is the correct choice.
When integrating this model, avoid using a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock; an independent-exhaust solenoid valve is required. The PT port size is 1/4. For any safety-critical lifting application where human safety depends on the load staying extended, always add an independent mechanical safety measure alongside 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 SAILF50X175S FAQ
At 0.5 MPa, this 50mm bore cylinder provides 982N of push force and 825N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers a maximum push force of 200 kgf.
The lock is spring-applied and air-released, meaning it engages automatically to hold the rod at the extended stroke end when air pressure is cut. To unlock it, you supply air to the release port or use the manual release lever. It only holds at the stroke end and does not clamp mid-stroke.
Related AirTAC Lock & Standard Cylinders
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