Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150S is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 150mm 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
- Stroke150 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 SAILF40X150S
The AirTAC SAILF40X150-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. Because the lock engages at the extended stroke end, it securely holds the rod-out position, delivering a push force of 879N at 0.7MPa. The integrated magnet supports position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors.
This unit uses a carbon steel rod and PT tapered port threads. A critical design detail is that the variable air cushion at the locker end is only 20mm, shorter than the 27mm cushion on the free end, ensuring compact deceleration near the lock. Remember that the cushion only decelerates the load; the lock is what actually holds it statically after the cylinder stops.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAILF40X150S Is Used
Vertical Lift Hold
Secures an extended vertical load instantly upon air pressure loss, preventing gravity-driven drops in lifting jacks and small elevators.
Safety Gate Lock
Keeps machine access gates firmly locked in the open, extended position until the release air is actively supplied to the front cover port.
Clamp and Hold
Maintains outward clamping pressure on a workpiece without consuming live air, ensuring stable holding during machining cycles.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150S the Right Lock Cylinder?
Choose this 40mm bore when your application requires 879N of push force at 0.7MPa. If your load demands higher thrust, stepping up to the 50mm bore yields 1374N at the same pressure. Select this SAILF configuration to hold the rod at the extended stroke end; if you need to hold the retracted position, choose SAILB instead. For applications requiring the load to be clamped at an arbitrary mid-stroke point, the BSAI clamp-lock cylinder is the correct choice, as the SAIL lock only engages at the stroke terminal.
When specifying the replacement match, confirm the 40mm bore, 150mm stroke, front locker position, PT port threads, and the -S magnet option. A vital pneumatic red-line is to never use a fast-exhaust valve with this lock cylinder; always use an independent-exhaust solenoid valve, because back-pressure on the locker side can inadvertently release the spring-driven lock pin. If human safety depends on the load staying extended, add an independent mechanical safety measure as well.
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 SAILF40X150S FAQ
At 0.5MPa it provides 628N push and 528N pull force. At 0.7MPa the push force is 879N, and at 0.9MPa it reaches 1130N.
The lock is spring-applied and air-released, engaging statically only when the piston reaches the extended stroke end in the front cover. It does not brake a moving rod or clamp mid-stroke. You can unlock it automatically by supplying release air or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
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