Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50 is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 50mm 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
- Stroke50 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 SAILF63X50
The AirTAC SAILF63X50 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 engages at the extended stroke end, it secures your load safely in the rod-out position without requiring continuous live air pressure. Delivering 1559N of push force at 0.5MPa, this bore size handles robust workloads. The carbon steel piston rod provides durable performance, and the extruded aluminum barrel features sensor grooves on both sides.
This model features a 3/8 PT tapered port and variable air cushions at both ends. Note that the cushion at the locker end is physically shorter (21mm) than the free-end cushion (30mm) to accommodate the locking mechanism. The lock is a static holding device that engages only after the piston stops at the stroke terminal; it is not a mid-stroke clamp or a dynamic brake. For position sensing, the standard version ships without a magnet, but adding the -S option enables compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 50 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 SAILF63X50 Is Used
Vertical Lift Holding
Secures elevated loads in the extended position instantly upon air pressure loss, preventing sudden drops on vertical lifting actuators.
Extended Clamp Safety
Maintains clamping force on parts at the rod-out stroke end without consuming continuous compressed air, saving energy during holding.
Gate and Guard Locking
Keeps safety gates and heavy machine guards locked open at the full extension point until the release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X50 the Right Lock Cylinder?
Choose this 63mm bore when an application requires 1559N of thrust at 0.5MPa. If your project demands less force, stepping down to the 50mm bore yields 982N of push force, while moving up to the 80mm bore provides 2513N. Select the SAILF configuration when the load must be held securely at the extended rod-out position; if you need to hold the retracted position instead, choose the SAILB variant.
If your process requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice. To ensure the SAILF lock functions safely, never use a fast-exhaust valve, as back-pressure on the locker side can inadvertently release the lock; always utilize an independent-exhaust solenoid valve. If human safety relies on the load remaining elevated, implement an additional independent safety measure. Replacement specifications must match the 63mm bore, 50mm stroke, front locker position, 3/8 PT port, and your required mounting style from the ISO 15552 interface.
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 SAILF63X50 FAQ
At 0.5MPa operating pressure, the 63mm bore generates 1559N of push force and 1402N of pull force. At 0.7MPa, the push force increases to 2182N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold after the cylinder stops, not a dynamic brake, and unlocks via air supply or manual release.
Related AirTAC Lock & Standard Cylinders
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