Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500S is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 500mm 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
- Stroke500 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 SAILF40X500S
The AirTAC SAILF40X500-S 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, it automatically secures the rod at the extended stroke end the moment pressure is removed, safely holding a load without live air. This 40mm bore generates 628N of push force at 0.5 MPa, making it suitable for compact load-holding tasks.
The integrated lock engages only after the piston stops at the extended terminal; it is a static holding device rather than a dynamic brake. For position feedback, the included magnet works seamlessly with AirTAC CMSE reed switches and DMSE solid-state electronic sensors. Note that the variable air cushion at the front lock end is shorter at 20mm compared to 27mm on the free end, a specific design adjustment to accommodate the locking hardware.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAILF40X500S Is Used
Extended Lift Holding
Maintains vertical elevation securely at the extended stroke end during power loss, preventing sudden drops.
Pneumatic Stop Gate
Locks a diverter or stop gate in the extended position to hold items on the line without continuous air consumption.
Safety Guard Lock
Keeps a machine safety door open and mechanically locked at the full extension point until air is supplied to release.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500S the Right Lock Cylinder?
Choose this front-lock variant when your application requires the load to be held securely in the extended rod-out position. If your process needs holding force at the retracted end, the SAILB40X500 is the correct alternative. Should you require clamping at an arbitrary mid-stroke position rather than a stroke-end stop, select the BSAI clamp-lock cylinder instead. For this 500mm stroke, adding an external guide is recommended to prevent excessive side-loading on the rod.
Honest load-holding limitations are vital: the lock is a static device and will not stop a moving rod. Furthermore, never use a fast-exhaust valve with this cylinder; always use an independent-exhaust solenoid valve, as back-pressure on the locker side can unintentionally release the lock. If human safety depends on the load remaining elevated, add an independent mechanical safety measure. To replace this unit, match the 40mm bore, 500mm stroke, front lock position, PT port threads, and the -S magnet option.
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 SAILF40X500S FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa it provides 879N of push force.
The lock is spring-applied and air-released, engaging statically at the extended stroke end to hold the load without live pressure. It can be unlocked automatically by supplying air to the release port or manually via the lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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