Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X125S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X125S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 125mm 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
- Stroke125 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 SAILF63X125S
The AirTAC SAILF63X125-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because this is a SAILF variant, the spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the rod-out position. At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force, making it well-suited for mid-weight load manipulation.
This model includes a -S magnet for seamless position feedback with AirTAC CMSE reed and DMSE solid-state sensors. The variable air cushion at the locker end is 21 mm, intentionally shorter than the 30 mm cushion on the free end to accommodate the locking mechanism. Remember that the lock is a static holding device; it engages after the cylinder stops and is not designed to brake a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X125S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X125S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAILF63X125S Is Used
Vertical Lift Hold
Secures an extended vertical lift in place automatically during a power loss, preventing gravity-driven drops.
Extended Clamp Hold
Maintains outward clamping pressure on a part at the end of the stroke without continuously consuming air.
Gate Safety Stop
Locks a safety gate in the open position until the release air is actively supplied to the front cover.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X125S the Right Lock Cylinder?
Choose this 63 mm bore when your application requires approximately 1559 N of thrust at 0.5 MPa; if you need less force, stepping down to a 50 mm bore yields 982 N, while upgrading to an 80 mm bore provides 2513 N. Select the SAILF configuration specifically when the load must be secured in the extended rod-out position. If your process requires holding at an arbitrary mid-stroke point rather than the stroke terminal, you must use the BSAI clamp-lock cylinder instead.
For safe operation, never use a fast-exhaust valve with this cylinder; back-pressure on the locker side can unintentionally release the lock, so an independent-exhaust solenoid valve is mandatory. The lock holds the load without live air pressure, but if human safety depends on the load remaining extended, add an independent safety measure. Replacement requires matching the 63 mm bore, 125 mm stroke, front lock position, 3/8 PT port, and ISO 15552 mounting 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 SAILF63X125S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The lock is spring-applied and air-released. It engages automatically to hold the rod at the extended stroke end when pressure is cut. To unlock it, supply release air to the port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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