Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X300
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X300 is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 300mm 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.
- BoreØ63 mm
- Stroke300 mm
- Port sizeG3/8
- 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 SAILF63X300
The AirTAC SAILF63X300 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed in the front cover. Because the lock is spring-applied and air-released, cutting the release air automatically drives a lock pin into the rod, securing the load at the extended stroke end without requiring continuous live pressure. At 0.5 MPa, this 63 mm bore generates 1559 N of push force and 1402 N of pull force, operating efficiently at speeds of 30-800 mm/s.
This unit utilizes a carbon steel rod and PT tapered port threads. For motion control, the variable air cushion at the locker end is specifically machined shorter at 21 mm compared to the 30 mm cushion on the free end, ensuring deceleration does not interfere with the locking mechanism. The lock is a static holding device that engages only after the piston reaches the stroke terminal, meaning it is not designed to stop a moving rod or clamp at arbitrary mid-stroke positions.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X300 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X300 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 300 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| 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 / 21 mm lock end) |
| Max stroke | Up to 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SAILF63X300 Is Used
Extended Lift Holding
Secures vertical lifts in the extended position during a power loss event, utilizing the front cover lock to prevent gravity-driven collapses without needing live air pressure.
Pallet Stop Gate
Locks a diverter or stop gate in the rod-out position to halt pallet traffic, ensuring the gate remains rigidly extended even if the main air supply drops.
Safety Barrier Hold
Maintains a physical safety barrier in the extended stroke-end position, engaging the lock pin automatically once the barrier reaches its full open limit.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X300 the Right Lock Cylinder?
Select this SAILF configuration when your machinery requires a safety hold specifically at the extended rod-out position. If your application demands 2805 N of push force at 0.7 MPa, stepping up to the 80 mm bore is advisable, while dropping to a 50 mm bore reduces the 0.5 MPa push force to 982 N. For operations that require locking at any arbitrary mid-stroke point rather than solely at the stroke end, the BSAI clamp-lock cylinder is the correct alternative.
When integrating this 300 mm stroke model, always implement external guide rails to counteract side-load leverage on the extended rod. To maintain lock integrity, never use a fast-exhaust valve, as back-pressure on the locker side can inadvertently release the pin; instead, specify an independent-exhaust solenoid valve. If human safety relies on this load staying elevated, add an independent mechanical safety measure. Replacement matches require a 63 mm bore, 300 mm stroke, front locker position, PT port threads, and standard carbon steel rod construction.
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 SAILF63X300 FAQ
The 63 mm bore generates a push force of 1559 N and a pull force of 1402 N at 0.5 MPa. At 0.7 MPa, the push force increases to 2182 N, and it reaches 2805 N at 0.9 MPa.
The lock is spring-applied and air-released, holding the rod securely at the extended stroke end. It only engages as a static hold after the cylinder stops, and you can unlock it automatically via air or manually with a lever.
Related AirTAC Lock & Standard Cylinders
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