Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X300
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X300 is a genuine double-acting ISO 15552 profile cylinder with a Ø200mm bore, 300mm 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
- Stroke300 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 SAILF200X300
The AirTAC SAILF200X300 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed in the front cover. Because the lock is spring-applied and air-released, cutting the release air drives a lock pin into the rod, securing the load at the extended stroke end without requiring live pressure. In the 200mm bore class, it generates 15708N of thrust at 0.5MPa and up to 28274N at 0.9MPa, making it suited for heavy-duty positioning. Unlocking is achieved automatically by supplying air to the release port or by using the manual release lever.
This model uses a PT tapered port thread and a carbon steel rod. A critical design detail is that the variable air cushion at the locker end is shorter at 28mm compared to the free end's 50mm cushion. The lock provides a static hold that engages only after the piston stops at the stroke terminal; it is not a dynamic brake for a moving rod. For pneumatic sensing, adding a magnet (-S) allows the use of AirTAC CMSE reed or DMSE solid-state switches in the barrel grooves.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X300 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X300 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø200 mm |
| Stroke | 300 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 SAILF200X300 Is Used
Vertical Load Safety
Holds heavy lifted payloads securely at the extended stroke end during a compressed air failure, preventing sudden drops.
Heavy Press Hold
Maintains maximum push force on a workpiece at the rod-out terminal without consuming continuous air pressure.
Gate Safety Lock
Secures heavy safety gates or machinery doors in the open extended position until a controlled air release signal is sent.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF200X300 the Right Lock Cylinder?
Choose this 200mm bore cylinder when an application requires holding a massive extended load securely during a power loss, stepping up from a 160mm bore that provides 10053N at 0.5MPa. If the full extended stroke force is unnecessary, dropping to a smaller bore saves space and air consumption. Select this SAILF variant when the load must be held at the extended rod-out position; conversely, choose SAILB to hold the load retracted. If your application requires clamping at an arbitrary mid-stroke point rather than the stroke end, select the BSAI clamp-lock cylinder instead.
Valve selection is critical: do not use a fast-exhaust valve with this lock cylinder. You must use an independent-exhaust solenoid valve because back-pressure on the locker side can unintentionally release the lock. Furthermore, if human safety depends on the load staying extended, add an independent safety measure alongside the lock. To replace this unit, match the 200mm bore, 300mm stroke, front locker position, PT port thread, and the chosen mounting style from the ISO 15552 options. Because the stroke is 300mm, ensure adequate side-load support by using a guide rail to prevent rod binding.
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 SAILF200X300 FAQ
At 0.5MPa, the push force is 15708N and the pull force is 15080N. At 0.9MPa, the push force increases to 28274N.
The lock is spring-applied and air-released, holding the rod statically at the extended stroke end. It engages after the cylinder stops and is not a mid-stroke clamp or dynamic brake. Unlock it automatically via air pressure or manually via the release lever.
Related AirTAC Lock & Standard Cylinders
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