Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000 is a genuine double-acting ISO 15552 profile cylinder with a Ø125mm bore, 1000mm 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
- Stroke1000 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 SAILF125X1000
The AirTAC SAILF125X1000 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. This spring-applied, air-released lock engages automatically when the piston reaches the extended stroke end, securely holding the load without requiring continuous live air pressure. With a robust 125mm bore generating 6136N of push force at 0.5MPa, it is built for heavy-duty load-holding tasks.
The lock mechanism engages statically after the cylinder has fully stopped, rather than acting as a dynamic brake for a moving rod. Notably, the variable air cushion at the front locker end is shorter (24mm) compared to the free end (40mm) to accommodate the locking hardware. For position feedback, you can add a magnet (-S) to use with AirTAC CMSE reed or DMSE solid-state sensors.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAILF125X1000 Is Used
Extended Load Holding
Secures heavy vertical lifts in the extended rod-out position, preventing sudden drops during power loss or pneumatic failure.
Safety Gate Lock
Keeps large industrial safety gates and machine guards firmly locked open at the end of the stroke until the release air is actively supplied.
Press Hold at End
Maintains a static pressing force at the extended stroke end without consuming continuous compressed air, ideal for long-duration holding cycles.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X1000 the Right Lock Cylinder?
Choose this 125mm bore when substantial thrust is needed; stepping down to an 80mm bore yields 2513N push at 0.5MPa, while a 160mm bore offers 10053N for heavier mechanisms. The SAILF variant specifically secures the rod-out position, whereas a SAILB holds the retracted state. If your application requires clamping at an arbitrary mid-stroke point rather than the extended end, select the BSAI clamp-lock cylinder instead.
Because the 1000mm stroke exceeds the 1500mm standard maximum limit, this is a non-standard configuration requiring careful side-load management; always use a dedicated guide rail to prevent rod binding. The lock is a static holding device, not a mid-stroke clamp or dynamic brake. Never use a fast-exhaust valve with this cylinder, as back-pressure on the locker side can unintentionally release the lock; use an independent-exhaust solenoid valve. If human safety depends on the load staying extended, add an independent mechanical safety measure. Replacement matching requires 125mm bore, 1000mm stroke, front locker, PT port threads, and standard carbon steel rod.
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 SAILF125X1000 FAQ
At 0.5MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold, not a mid-stroke clamp or dynamic brake. To unlock, supply air to the release port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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