Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500 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 SAILF40X500
The AirTAC SAILF40X500 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 pin into the rod to securely hold the load at the extended stroke end without requiring live pressure. You can unlock it automatically by supplying air to the release port or by using the manual release lever. Delivering 879 Newtons of push force at 0.7 MPa, this 40mm bore unit provides reliable power for mid-scale tasks.
This model features a standard carbon steel rod and PT tapered port threads. The variable air cushion at the locker end is 20mm, intentionally shorter than the 27mm cushion on the free end to accommodate the locking hardware. For position sensing, adding a -S magnet allows the use of AirTAC CMSE reed or DMSE solid-state sensors in the dual-side barrel grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500 |
|---|---|
| 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 SAILF40X500 Is Used
Vertical Lift Holding
Maintains a raised platform securely at the extended stroke end during a power loss, preventing sudden drops.
Extended Clamp Lock
Keeps a workpiece clamped firmly in the rod-out position without consuming continuous compressed air.
Gate Safety Stop
Holds a heavy safety gate open at the end of the stroke until an air signal is actively supplied to release it.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500 the Right Lock Cylinder?
Choose this SAILF variant when your application specifically requires the load to be held securely in the extended rod-out position. If your process needs holding force at the retracted end instead, select the SAILB counterpart. Should your design require clamping at an arbitrary mid-stroke point rather than a static stroke-end hold, the BSAI clamp-lock cylinder is the correct choice. Stepping up to the 50mm bore raises the 0.5 MPa push force to 982 Newtons if greater thrust is needed.
For a 500mm stroke on a 40mm bore, using external side-load guides is strongly recommended to prevent rod damage and ensure smooth operation. Remember that this lock is a static holding device, not a dynamic brake. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve. If human safety depends on the load staying elevated, add an independent mechanical safety measure. Replacement parts must match the 40mm bore, 500mm stroke, front locker position, PT threads, and mounting style.
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 SAILF40X500 FAQ
The 40mm bore provides a push force of 628 Newtons at 0.5 MPa and 879 Newtons at 0.7 MPa. The pull force is 528 Newtons at 0.5 MPa.
The spring-applied lock engages when the piston reaches the extended stroke end in the front cover. It holds the load statically without live pressure. To unlock, supply air to the release port or use the manual override.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X500
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.