Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X350
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X350 is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 350mm 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
- Stroke350 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 SAILF40X350
The AirTAC SAILF40X350 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. This lock engages automatically when the piston reaches the extended stroke end, securely holding a 879N load at 0.7MPa without requiring continuous live air pressure. A manual release lever provides secondary unlocking control.
The locker-end air cushion is notably shorter at 20mm compared to the 27mm cushion on the free end, reflecting the internal space required for the locking pin. The extruded aluminum barrel utilizes PT tapered ports and, because no -S magnet is specified, does not support CMSE or DMSE sensors without modification.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X350 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X350 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAILF40X350 Is Used
Extended Lift Holding
Secures vertical lifts in the extended position during power loss, preventing gravity-driven drops until air is restored.
Pallet Stop Gate
Locks a pneumatic stop gate in the fully extended position to halt pallets on an assembly line without consuming air.
Safety Barrier Pin
Drives a safety barrier pin outward and locks it at the stroke end to physically block machinery access during maintenance.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X350 the Right Lock Cylinder?
Choose this 40mm bore when your application demands 879N of push force at 0.7MPa and a positive stop at the extended stroke end. If your load requires holding at the retracted position, select the SAILB40X350 instead. For applications needing to clamp and hold a load at an arbitrary mid-stroke point rather than a stroke end, the AirTAC BSAI clamp-lock cylinder is the correct choice.
Because the 350mm stroke exceeds the 300mm threshold, adding an external guide rail is highly recommended to prevent excessive side-load wear on the 16mm carbon steel rod and seals. Remember that this is a static holding lock that engages after the cylinder stops, not a dynamic brake. Avoid using fast-exhaust valves, as back-pressure on the locker side can inadvertently release the lock; use an independent-exhaust solenoid valve instead. Always add an independent mechanical safety measure if human safety depends on the suspended load.
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 SAILF40X350 FAQ
At 0.7MPa operating pressure, the 40mm bore generates 879N of push force and 528N of pull force. The maximum operating pressure is 1.0MPa.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold, not a dynamic brake. Unlocking is achieved automatically by supplying release air or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
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