Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175 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 SAILF50X175
The AirTAC SAILF50X175 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. This lock engages when the piston reaches the extended stroke end, securely holding the rod-out position. Delivering 982N of push force at 0.5 MPa, it uses a standard carbon steel rod with an M16x1.5 thread and a 1/4 PT port.
Because the lock is housed in the front cover, the variable air cushion on that locker end is shorter at 20mm compared to the 30mm cushion on the free end. The lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. It releases automatically via air pressure or manually via a lever, but requires an independent-exhaust solenoid valve, as fast-exhaust valves can cause back-pressure that accidentally releases the lock.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175 |
|---|---|
| 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 SAILF50X175 Is Used
Vertical Lift Holding
Maintains an elevated platform securely at the extended stroke end during a power loss, preventing gravity-driven crashes.
Pallet Stop Gate
Locks a diverter pop-up in the rod-out position to halt heavy pallets without requiring continuous pneumatic pressure.
Safety Guard Barrier
Holds a protective machine guard open and stable at the extended end until the release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X175 the Right Lock Cylinder?
Choose this 50mm bore when your application requires holding a load safely at the extended rod-out position without consuming live air. If you need higher clamping force, stepping up to the 63mm bore provides 1559N of push force at 0.5 MPa; if less force is needed, the 40mm bore offers 628N. Select the SAILF configuration for extended-end holding, or SAILB if the load must be held retracted.
If your machinery requires locking at an arbitrary mid-stroke position rather than the stroke end, select the BSAI clamp-lock cylinder instead. For safety-critical loads that could cause injury if they drop, always add an independent mechanical safety measure alongside this cylinder. Replacement parts must match the 50mm bore, 175mm stroke, front lock position, PT port threads, and standard mounting interface. Since this stroke is under 300mm, side-load stress is manageable, but always verify guide rod alignment.
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 SAILF50X175 FAQ
At an operating pressure of 0.5 MPa, the 50mm bore provides 982N of push force and 825N of pull force. It can reach a maximum push force of 1767N at 0.9 MPa.
The lock is spring-applied and air-released, engaging statically only when the piston reaches the extended stroke end. It does not clamp at mid-stroke. To unlock it, you supply air to the release port or use the manual lever, but avoid fast-exhaust valves as back-pressure can unintentionally release the lock.
Related AirTAC Lock & Standard Cylinders
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