Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X700S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X700S is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 700mm 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
- Stroke700 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 SAILF40X700S
The AirTAC SAILF40X700-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. Because this is a SAILF variant, the spring-applied, air-released lock engages only when the piston reaches the extended stroke end, firmly holding the rod out without relying on live air pressure. At 0.7 MPa it delivers 879 N of push force, making it well-suited for lighter-duty load retention.
This 40 mm bore unit includes a magnetic piston for position sensing with CMSE reed and DMSE electronic switches. The variable air cushion at the locker end is notably shorter at 20 mm compared to 27 mm on the free end, a specific design accommodation for the lock mechanism. The standard carbon steel rod uses an M12x1.25 thread, and fluid supply connects via a 1/4 PT port.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X700S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X700S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 700 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 SAILF40X700S Is Used
Extended Load Holding
Maintains vertical loads securely at the full rod-out position on power loss, utilizing the front mechanical lock to prevent unintended retraction.
Pallet Stopper Arms
Holds a stopper arm extended at the end of stroke to halt pallets on a line, keeping the load fixed without consuming continuous air.
Safety Gate Lock
Secures a guard or gate in its open extended state, requiring an active air signal to the release port to unlock and allow safe closure.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X700S the Right Lock Cylinder?
Choose this 40 mm bore when your application requires holding a load at the full extended position without continuous air consumption; if you need higher force, stepping up to the 50 mm bore provides 1374 N of push at 0.7 MPa. If the load must be clamped at an arbitrary mid-stroke point rather than the extended end, select the BSAI clamp-lock cylinder instead.
For safe operation, never use a fast-exhaust valve with this lock cylinder, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve. Because the 700 mm stroke is substantial, ensure adequate side-load support by using a guide rail to prevent rod deflection. To replace this unit, match the 40 mm bore, 700 mm stroke, front lock position, 1/4 PT port, 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 SAILF40X700S FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. The maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, engaging statically when the rod reaches the extended stroke end. It does not clamp mid-stroke. Unlocking occurs automatically by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X700S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.