Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450 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 SAILF63X450
The AirTAC SAILF63X450 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages to hold the rod securely at the extended stroke end, making it ideal for supporting outward thrust loads of 1559 N at 0.5 MPa without relying on continuous live air pressure. The standard carbon steel rod provides durable performance for demanding industrial environments.
Because the lock occupies the front end, the variable air cushion on that locker side is shorter at 21 mm compared to the 30 mm cushion on the free end. The lock releases automatically via air supply or manually via a lever, but avoid fast-exhaust valves; back-pressure on the locker side can unintentionally release the lock, so an independent-exhaust solenoid valve is required.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450 |
|---|---|
| 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 SAILF63X450 Is Used
Extended Load Lifting
Secures vertical lifts in the outward position, preventing collapses if air pressure drops during operation.
Flow Control Diverter
Holds a diverter gate open at the end of stroke without consuming continuous air, saving energy.
Safety Guard Positioning
Locks a heavy machine guard in the open position to protect maintenance personnel during downtime.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X450 the Right Lock Cylinder?
Choose this 63 mm bore when a 50 mm bore (825 N pull at 0.5 MPa) lacks the force to hold an extended load, but an 80 mm bore (2268 N pull) would be physically oversized. Select the SAILF configuration specifically when the load must be secured in the extended position, whereas a SAILB variant holds the retracted rod. If your application requires clamping at an arbitrary mid-stroke point rather than a stroke-end static hold, the BSAI clamp-lock cylinder is the correct choice instead.
For this 450 mm stroke, adding external guide rails is recommended to prevent excessive side-loading on the rod. Remember that the lock is a static holding device, not a dynamic brake for a moving rod, and safety-critical suspended loads require an independent mechanical backup. Replacement specifications must match the 63 mm bore, 450 mm stroke, 3/8 PT port, and your required mounting style from the full ISO 15552 set.
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 SAILF63X450 FAQ
The 63 mm bore generates a push force of 1559 N at 0.5 MPa and 2182 N at 0.7 MPa. The pull force is 1402 N at 0.5 MPa, with a maximum operating pressure of 1.0 MPa.
The lock is spring-applied and air-released, holding the rod statically only at the extended stroke end. It unlocks automatically via air supply or manually via a lever, but it does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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