Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X400
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X400 is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm bore, 400mm 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.
- BoreØ200 mm
- Stroke400 mm
- Port sizeG3/4
- Lock positionFront cover
- Rod threadM36×2
- 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 SAILF200X400
The AirTAC SAILF200X400 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed 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 without relying on live air pressure. It delivers massive thrust, offering 15708N of push force and 15080N of pull force at 0.5 MPa, making it suitable for heavy-duty industrial positioning.
This model features a carbon steel rod and PT tapered port threads. To ensure safe operation, avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the mechanism; an independent-exhaust solenoid valve is required. Additionally, the variable air cushion at the locker end is 50mm, which is shorter than the free end, a specific design accommodation for the locking hardware.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X400 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X400 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 400 mm |
| Acting type | Double acting, with lock |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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 (50 mm free end / 28 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 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 SAILF200X400 Is Used
Heavy Lift Holding
Maintains vertical loads safely in the extended position during a power loss, preventing sudden drops on heavy machinery.
Press Clamping
Holds heavy workpieces securely at the extended stroke end without requiring continuous compressed air supply.
Safety Gate Barrier
Locks industrial safety gates in the open position, requiring an intentional air release signal to close.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X400 the Right Lock Cylinder?
Choose this 200mm bore when substantial force is required, offering 15080N pull at 0.5MPa compared to the 9425N pull of the neighboring 160mm bore. Select the SAILF configuration when the application specifically requires the load to be held at the extended rod-out position. If your machinery needs to freeze the rod 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. For any safety-critical lifting application where human safety depends on the load staying extended, always add an independent mechanical safety measure. Since the stroke is 400mm, ensure proper guide rails are used to prevent excessive side-loading on the rod. Replacement specifications require a 200mm bore, 400mm stroke, front locker position, PT port threads, and standard mounting options like TC or LB.
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 SAILF200X400 FAQ
At an operating pressure of 0.5 MPa, the SAILF200X400 provides 15708N of push force and 15080N of pull force. The maximum operating pressure is 1.0 MPa.
The lock is spring-applied and air-released, engaging automatically when the piston reaches the extended stroke end to hold the load statically. It unlocks by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
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