Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600S 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 SAILF40X600S
The AirTAC SAILF40X600-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. This lock engages automatically when the piston reaches the extended stroke end, ensuring your load remains securely held without relying on continuous live air pressure. In the 40mm bore class, it generates 879N of push force at 0.7MPa. The carbon steel rod and PT tapered port threads are standard, and the -S magnet enables precise position detection using AirTAC CMSE reed and DMSE electronic sensors.
Because the lock occupies the front end, the variable air cushion on the locker side is shortened to 20mm compared to the 27mm cushion on the free end. The lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. For safety-critical vertical lifting applications, always add an independent mechanical safety measure to protect against unexpected gravity drops.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600S |
|---|---|
| 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 SAILF40X600S Is Used
Extended Lift Hold
Maintains vertical lifts securely in the extended position during power loss, preventing sudden gravity drops.
Flow Stop Positioning
Locks a diverter or stopper block at the full rod-out stroke end to halt items on a production line.
Safety Gate Latch
Provides a fail-safe mechanical latch for access doors or safety gates when machine air pressure is removed.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X600S the Right Lock Cylinder?
Choose this 40mm bore when you need 879N of thrust at 0.7MPa; step up to the 50mm bore if you require 1374N at the same pressure. Select the SAILF configuration specifically when the load must be held securely at the extended rod-out position. If your application requires clamping at an arbitrary mid-stroke point rather than the stroke end, choose the BSAI clamp-lock cylinder instead. The SAILF lock holds statically only after the rod stops, so never treat it as a dynamic braking device.
At 600mm stroke, the extended rod is highly susceptible to bending under lateral loads, so rigid guide rails or external linear bearings are essential to prevent side-load damage. For replacements, verify the 40mm bore, 600mm stroke, front locker position, PT port threads, and the -S magnet option. Avoid using fast-exhaust valves with this cylinder; opt for an independent-exhaust solenoid valve because back-pressure on the locker side can unintentionally release the lock.
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 SAILF40X600S FAQ
The 40mm bore generates 628N of push force and 528N of pull force at 0.5MPa. At 0.7MPa, the push force increases to 879N, reaching a maximum push of 1130N at 0.9MPa.
The spring-applied, air-released lock engages statically when the piston reaches the extended stroke end in the front cover. It holds the load without live pressure. To unlock, supply air to the release port or use the manual release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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