Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 450mm 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
- Stroke450 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 SAILF63X450S
The AirTAC SAILF63X450-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, it automatically engages a lock pin to hold the rod securely at the extended stroke end whenever the release air is cut. This guarantees the load remains fixed in the out position without relying on continuous live pressure. At 0.5 MPa, this 63 mm bore generates 1559 N of push force and 1402 N of pull force.
The integrated magnet enables position detection with AirTAC CMSE reed or DMSE electronic solid-state sensors. A key design detail is that the variable air cushion at the locker end is shorter (21 mm) than the free end cushion (30 mm). Furthermore, the lock is a static holding mechanism that engages only after the piston stops at the stroke terminal; it will not brake a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 450 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 SAILF63X450S Is Used
Extended Load Holding
Maintains a vertical load securely at the extended stroke end on the front cover side during a power loss, preventing gravity from retracting the assembly.
Transfer Pause
Holds a diverter arm firmly in the out position without consuming compressed air, ensuring a conveyor lane change remains locked until actively released.
Safety Gate Barrier
Keeps a protective barrier extended across a machine opening, using the mechanical lock to ensure the gate stays closed even if the air supply drops.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450S the Right Lock Cylinder?
Choose this 63 mm bore when your application requires 1559 N push force at 0.5 MPa, stepping up from a 50 mm bore (982 N push) for heavier extended loads. The SAILF variant is specifically selected when the load must be held at the extended rod-out position, whereas SAILB holds the retracted position. If your process requires clamping at an arbitrary mid-stroke point rather than the end, the BSAI clamp-lock cylinder is the correct choice instead of this stroke-end model.
For safe operation, never use a fast-exhaust valve with this cylinder; always use an independent-exhaust solenoid valve to prevent back-pressure on the locker side from accidentally releasing the lock. At a 450 mm stroke, side-load risks are significant, so rigid guidance must be used to prevent rod binding. To replace this unit, match the 63 mm bore, 450 mm stroke, front lock position, PT tapered ports, and the -S magnet option.
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 SAILF63X450S FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. If the pressure is increased to 0.7 MPa, the push force rises to 2182 N.
The lock is spring-applied and air-released, meaning it engages automatically to hold the rod at the extended stroke end when release air is removed. You can unlock it by supplying air to the release port or by using the manual release lever. It is a static hold only, so it will not stop a moving rod.
Related AirTAC Lock & Standard Cylinders
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