Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150 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 SAILF40X150
The AirTAC SAILF40X150 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. This spring-applied, air-released lock engages automatically when the piston reaches the extended stroke end, securely holding the load without requiring continuous live air pressure. With a 40mm bore, it generates 879N of push force at 0.7 MPa, making it well-suited for lighter-duty holding tasks. The standard carbon steel rod provides durable service in typical industrial environments.
Unlike a plain SAI cylinder, this model retains the load safely upon power loss, but only at the full extended position. The variable air cushion at the locker end is notably shorter, measuring 20mm compared to the 27mm cushion on the free end. Because it is a static holding lock rather than a dynamic brake, it engages strictly after the cylinder has stopped moving.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150 |
|---|---|
| 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 SAILF40X150 Is Used
Vertical Lift Holding
Secures a raised platform or load at the extended stroke end, preventing sudden drops when air pressure is cut off.
Extended Clamp Safety
Maintains clamping force on a workpiece at the full rod-out position without consuming continuous pneumatic energy.
Gate Safety Stop
Locks a safety gate or guard open in the extended position, requiring an active air signal to release and close.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150 the Right Lock Cylinder?
Choose this 40mm bore cylinder when an application requires 628N of push force at 0.5 MPa or 1130N at 0.9 MPa; if your mechanism needs more power, stepping up to the 50mm bore yields 982N at 0.5 MPa. Select the SAILF configuration specifically when the rod must be locked in the extended position, whereas SAILB holds the retracted end. If your workflow demands clamping at an arbitrary mid-stroke point rather than the stroke terminal, the BSAI clamp-lock cylinder is the correct alternative.
For safe operation, never pair this unit with a fast-exhaust valve; use an independent-exhaust solenoid valve instead, as back-pressure on the locker side can unintentionally release the lock. If human safety relies on the load remaining elevated, always add an independent mechanical safety measure. Replacement specifications require a 40mm bore, 150mm stroke, front locker position, PT port threads, and no magnet. The 150mm stroke operates efficiently within the 30-800 mm/s speed range, but external guide rails should support any side loads.
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 SAILF40X150 FAQ
At 0.5 MPa, the 40mm bore provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The lock is spring-applied and air-released, holding the rod securely at the extended stroke end without live pressure. To unlock it, supply air to the release port for automatic retraction, or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X150
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.