Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600 is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 600mm 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
- Stroke600 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 SAILF40X600
The AirTAC SAILF40X600 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because the lock is spring-applied and air-released, cutting the release air drives a lock pin into the rod, securely holding the load at the extended stroke end without consuming live pressure. You can unlock it automatically by supplying air to the release port or by using the manual release lever. In the 40mm bore class, it generates 879N of push force at 0.7 MPa, making it suitable for moderate load-holding tasks.
A key design detail is that the variable air cushion at the locker end is 20mm, which is shorter than the 27mm cushion on the non-lock end. This cylinder uses a carbon steel rod and PT threaded ports. It is crucial to understand that this is a static holding lock that engages only after the piston reaches the stroke terminal, not a dynamic brake for a moving rod.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 600 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 SAILF40X600 Is Used
Extended Load Holding
Maintains vertical loads securely at the extended stroke end during power loss, preventing gravity-induced drops.
End-Stop Clamping
Holds a conveyor workpiece firmly in place at the out-stroke terminal while operations are performed.
Gate Safety Hold
Keeps safety gates or heavy barriers locked open at the extended position until intentionally released.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600 the Right Lock Cylinder?
Choose this 40mm bore if your application requires 879N of push force at 0.7 MPa; stepping up to the 50mm bore provides 1374N if your load demands more thrust. Select the SAILF configuration specifically when you need the rod held out at the extended stroke end, whereas SAILB holds the retracted position. If your workflow requires clamping at an arbitrary mid-stroke point rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice instead. The lock holds the load statically at the stroke end without live air, but you must avoid using a fast-exhaust valve; an independent-exhaust solenoid valve is required because back-pressure on the locker side can accidentally release the lock. Always add an independent safety measure for human-safety-critical suspended loads. For this 600mm stroke, use a side-load guide to prevent rod bending. Replacement match: 40mm bore, 600mm stroke, front locker, PT port, standard mounting, no magnet.
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 SAILF40X600 FAQ
At 0.7 MPa operating pressure, the 40mm bore provides 879N of push force and 528N of pull force. The maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, holding the rod statically at the extended stroke end when release air is cut. It is not a mid-stroke clamp or dynamic brake. It unlocks automatically via air supply or manually via the lever.
Related AirTAC Lock & Standard Cylinders
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