Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X225
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X225 is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm 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.
- BoreØ40 mm
- Stroke225 mm
- Port sizeG1/4
- Lock positionFront cover
- Rod threadM12×1.25
- 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 SAILF40X225
The AirTAC SAILF40X225 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This mechanism engages when the piston reaches the extended stroke end, securely holding the load without requiring continuous live air pressure. In the 40mm bore class, it generates 879N of push force and 528N of pull force at 0.5 MPa, utilizing a 16mm carbon steel rod.
Because the lock occupies the front end, the variable air cushion on that side is notably shorter at 20mm compared to the 27mm cushion on the free end. The cylinder operates at speeds between 30 and 800 mm/s, and positioning sensors can be added by specifying the -S magnet option to support AirTAC CMSE reed and DMSE electronic switches in the dual sensor grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X225 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X225 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (27 mm free end / 20 mm lock end) |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SAILF40X225 Is Used
Vertical Lift Hold
Maintains an elevated load safely at the extended stroke end during a sudden air pressure loss, preventing crashes until release air is restored.
Pallet Stop Gate
Acts as a rigid stop for pallets on a conveyor, locking firmly in the extended position to hold items securely in place for processing.
Safety Guard Door
Keeps a protective machine guard fully open and mechanically locked while operators access the cell, releasing only via controlled air input.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X225 the Right Lock Cylinder?
Choose this 40mm bore model when an application requires safely suspending a load at the fully extended position; if the hold is needed at the retracted end instead, select the SAILB variant. For applications demanding mid-stroke clamping, the BSAI clamp-lock cylinder is the correct choice, as the SAIL lock only engages at the stroke terminal. Stepping up to a 50mm bore increases the 0.5 MPa push force to 982N, while dropping below 40mm is not available in the SAIL series.
When integrating this cylinder, avoid fast-exhaust valves and use an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. Always add an independent safety measure for human-life loads. Replacement specifications: 40mm bore, 225mm stroke, front locker, PT 1/4 port, carbon steel rod, and standard mounting options including FA, FB, TC, and LB.
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 SAILF40X225 FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N, with a maximum push force of 1130N at 0.9 MPa.
The lock is spring-applied and air-released, engaging only when the rod reaches the extended stroke end to provide a static hold without live pressure. It can be unlocked automatically by supplying air to the release port or manually via a lever, but it cannot hold at arbitrary mid-stroke positions.
Related AirTAC Lock & Standard Cylinders
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