Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X75
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X75 is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 75mm 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
- Stroke75 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 SAILF40X75
The AirTAC SAILF40X75 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. A spring-applied, air-released 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 delivers a push force of 879N at 0.7MPa and a pull force of 739N at the same pressure.
This model features a 16mm carbon steel rod and a 1/4 PT port. The variable air cushion at the locker end is notably shorter at 20mm compared to 27mm on the free end, a specific design accommodation for the locking hardware. The lock releases automatically via air supply or manually via a lever, but avoid fast-exhaust valves as back-pressure on the locker side can unintentionally release the lock.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X75 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X75 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 75 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 SAILF40X75 Is Used
Extended Lift Holding
Maintains a lifted load at the extended rod-out position during a power loss, preventing sudden drops without needing continuous air pressure.
End-of-Stroke Clamping
Secures a workpiece firmly at the front stroke terminal, ensuring stable positioning for machining or inspection tasks.
Gate Safety Locking
Keeps safety gates and heavy barriers securely open at full extension until an intentional air release signal is provided.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X75 the Right Lock Cylinder?
Choose this 40mm bore when your application requires safely holding a load at the fully extended rod-out position. If you need higher thrust, stepping up to the 50mm bore provides 1374N of push force at 0.7MPa. Select the SAILF front-locker variant for extended-end holding; if you need the rod held retracted, choose the SAILB back-locker version instead.
Remember that this lock is a static holding device for the stroke end, not a dynamic brake for a moving rod. If your process requires clamping at an arbitrary mid-stroke position, the AirTAC BSAI clamp-lock cylinder is the correct choice. For safety-critical lifting applications, always add an independent mechanical safety measure. Replacement specifications must match the 40mm bore, 75mm stroke, front lock position, 1/4 PT port, and standard carbon steel rod.
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 SAILF40X75 FAQ
The 40mm bore provides a push force of 879N at 0.7MPa and 1130N at 0.9MPa. The pull force is 739N at 0.7MPa and 950N at 0.9MPa.
The lock is spring-applied and air-released, engaging only when the rod reaches the fully extended stroke end. It unlocks automatically via air supply or manually via a lever, but it cannot hold the rod at a mid-stroke position.
Related AirTAC Lock & Standard Cylinders
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