Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X225S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X225S is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 225mm 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
- Stroke225 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 SAILF63X225S
The AirTAC SAILF63X225-S is a double-acting ISO 15552 profile cylinder equipped with a mechanical lock in the front cover, holding the rod securely at the extended stroke end. It delivers 1559N of push force at 0.5 MPa and features a carbon steel rod with a PT tapered port. Because this unit includes the -S magnet, it integrates directly with AirTAC CMSE reed and DMSE electronic solid-state sensors for precise end-position detection.
The integrated lock is spring-applied and air-released, meaning it engages automatically to hold the load without consuming live air pressure. Notably, the variable air cushion at the locker end is shorter (21mm) than the free end (30mm) to accommodate the locking mechanism. You can release the lock pneumatically or via the manual override lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X225S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X225S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 225 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 SAILF63X225S Is Used
Extended Lift Hold
Maintains a vertical load safely at the extended rod-out position during a sudden air pressure loss, preventing gravity-driven collapses.
Clamp and Hold
Secures a workpiece at the outward stroke end without requiring continuous live air pressure, saving energy between clamping cycles.
Gate Safety Stop
Keeps safety gates or heavy guarding doors locked in the open, extended position until the release air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X225S the Right Lock Cylinder?
Choose this 63mm bore when an application requires 1559N push force at 0.5 MPa to move a load and then hold it statically at the extended rod-out position. If your load is lighter, step down to the 50mm bore (982N push); if heavier, step up to the 80mm bore (2513N push). Select this SAILF model specifically when the danger of a power loss occurs with the rod extended. If you need to clamp the load at an arbitrary mid-stroke point rather than the stroke terminal, use the BSAI clamp-lock cylinder instead.
For replacements, verify the 63mm bore, 225mm stroke, front locker position, PT port threads, and the -S magnet option. The lock is a static holding device, not a dynamic brake for a moving rod. Avoid fast-exhaust valves, as back-pressure on the locker side can accidentally release the lock; use an independent-exhaust solenoid valve. If human safety relies on the load staying extended, always add an independent mechanical safety measure.
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 SAILF63X225S FAQ
At 0.5 MPa operating pressure, this 63mm bore cylinder provides 1559N of push force and 1402N of pull force. At 0.7 MPa, the push force increases to 2182N.
The lock is spring-applied and air-released, holding the rod statically at the extended stroke end. It engages after the piston stops and is released by supplying air to the release port or by using the manual lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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