Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160 is a genuine double-acting ISO 15552 profile cylinder with a Ø125mm bore, 160mm 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.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM27×2
- 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 SAILF125X160
The AirTAC SAILF125X160 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 piston rod at the extended stroke-end whenever the release air is cut off, holding the load safely without requiring live pressure. In the 125mm bore class, it generates a substantial 6136N of push force and 5734N of pull force at 0.5 MPa, making it highly capable for heavy-load manipulation.
This model features a carbon steel piston rod and PT tapered port threads. The variable air cushion at the locker end is specifically shortened to 24mm to accommodate the locking mechanism, which differs from the 40mm cushion length on the free end. For position monitoring, you can add an -S magnet to the piston and pair it with AirTAC CMSE reed or DMSE solid-state sensors mounted in the dual-side barrel grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø125 mm |
| Stroke | 160 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable (40 mm free end / 24 mm lock end) |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 SAILF125X160 Is Used
Overhead Lift Hold
Secures a lifted load in the extended position during power loss, preventing accidental descent without relying on continuous air pressure.
Press Clamp Lock
Maintains maximum clamping force at the extended stroke end for heavy pressing tasks, keeping the workpiece fixed while pressure is removed.
Safety Gate Barrier
Holds a heavy safety gate open at the full extended position, ensuring the barrier remains securely locked until the unlock air is actively supplied.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160 the Right Lock Cylinder?
Select this 125mm bore when a 100mm bore (offering 3927N push at 0.5 MPa) lacks the necessary thrust, but step down to it if the 160mm bore (10053N push at 0.5 MPa) provides excessive force. Choose this SAILF configuration when your application requires the load to be securely held in the extended, rod-out position. If your process requires clamping at an arbitrary mid-stroke point rather than the extended stroke-end, select the BSAI clamp-lock cylinder instead.
This lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Valve selection is critical: do not use a fast-exhaust valve, 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 remaining extended, implement an independent mechanical safety measure as well. To replace this unit, match the 125mm bore, 160mm stroke, front locker position, PT ports, and your required mounting style from the Basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1, or TCM2 options.
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 SAILF125X160 FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The lock is spring-applied and air-released, holding the rod statically at the extended stroke-end when release air is cut off. It unlocks automatically by supplying air to the release port, or manually via the release lever. It is not a dynamic brake and cannot stop a moving rod.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X160
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.