Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X600S
The AirTAC SAILF Front Locking Pneumatic Cylinder SAILF125X600S is a genuine double-acting ISO 15552 profile cylinder with a Ø125mm bore, 600mm 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
- Stroke600 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 SAILF125X600S
The AirTAC SAILF125X600-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 when the piston reaches the extended stroke end, securely holding the rod-out position without requiring live air pressure. It delivers a robust 6136N pull force at 0.5MPa, making it suitable for heavy-duty holding tasks. The standard carbon steel rod provides excellent structural integrity for high axial loads.
Equipped with a magnet for position detection, this unit supports AirTAC CMSE reed and DMSE electronic solid-state sensors. The variable air cushion at the locker end is 24mm, which is intentionally shorter than the 40mm cushion on the free end to accommodate the locking mechanism. For safe operation, avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X600S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X600S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAILF125X600S Is Used
Extended Load Holding
Maintains vertical loads safely in the rod-out position during power loss, using the front cover lock to prevent gravity-driven drops.
Heavy Clamp Securement
Provides a rigid 6136N pull force at 0.5MPa to hold heavy workpieces at the stroke end without consuming continuous compressed air.
Safety Gate Interlock
Keeps protective barriers and large safety gates firmly extended until the air-release signal is actively supplied to unlock the mechanism.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X600S the Right Lock Cylinder?
Choose this 125mm bore when substantial holding force is required at the extended stroke end; if your application needs less force, stepping down to an 80mm bore yields 2268N pull at 0.5MPa. Select the SAILF configuration specifically when the load must be held securely in the rod-out position. If your design requires clamping at an arbitrary mid-stroke point rather than the stroke terminal, the BSAI clamp-lock cylinder is the correct alternative.
Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Always use an independent-exhaust solenoid valve to prevent back-pressure from lifting the lock, and add an independent safety measure if human safety depends on the load staying extended. This 600mm stroke utilizes a PT tapered port and supports Basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1, and TCM2 mountings. At 600mm, the extended rod is susceptible to bending; ensure external linear guides are used to manage side loads and prevent rod deformation.
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 SAILF125X600S FAQ
At 0.5MPa, this 125mm bore cylinder provides 6136N of pull force and 8590N of push force. At the maximum operating pressure of 1.0MPa, it can deliver up to 1251kgf.
The lock is spring-applied and air-released, engaging statically when the rod reaches the extended stroke end. It does not clamp at mid-stroke. You can unlock it automatically via the air port or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X600S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.