Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X200
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X200 is a genuine double-acting ISO 15552 profile cylinder with a Ø40mm bore, 200mm 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.
- BoreØ40 mm
- Stroke200 mm
- Port sizeG1/4
- Lock positionFront cover
- Rod threadM12×1.25
- 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 SAILF40X200
The AirTAC SAILF40X200 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, cutting the release air drives a lock pin into the rod, securely holding the load at the extended stroke end without consuming live pressure. In the 40mm bore class, it generates 879N of push force at 0.7MPa, making it highly capable for mid-tier actuation tasks.
This model features a carbon steel rod and PT tapered port threads. A key design nuance is that the variable air cushion at the locker end is shorter (20mm) than the free end cushion (27mm). The lock is a static holding device that engages after the piston stops; it is not a dynamic brake. To unlock, supply air to the release port for automatic operation or use the manual release lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X200 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X200 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable (27 mm free end / 20 mm lock end) |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SAILF40X200 Is Used
Vertical Load Holding
Secures elevated loads at the extended stroke end, preventing sudden drops if air supply pressure is lost during operation.
Power-Off Safety
The spring-applied front lock engages automatically upon air loss, holding the rod safely out without requiring continuous electrical or pneumatic energy.
End-Stop Clamping
Holds a conveyor workpiece firmly in place at the extended terminal position for secondary processing or inspection.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF40X200 the Right Lock Cylinder?
Choose this 40mm bore if your application requires holding a load safely at the extended stroke end. If your process only needs 528N of pull force at 0.5MPa and lacks a true vertical hold requirement, a plain SAI cylinder without a lock is sufficient. If you must secure the load at an arbitrary mid-stroke position rather than the stroke terminal, select the BSAI clamp-lock cylinder instead.
For safe operation, never use a fast-exhaust valve with this lock cylinder; use an independent-exhaust solenoid valve to prevent back-pressure on the locker side from accidentally releasing the lock. If human safety depends on the load staying extended, add an independent safety measure. Replacement matches require the exact 40mm bore, 200mm stroke, front locker position, PT ports, and standard mounting options like FA, FB, or TC.
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 SAILF40X200 FAQ
The 40mm bore generates 628N push and 528N pull at 0.5MPa. At 0.7MPa, the push force is 879N, reaching 1130N at 0.9MPa. The maximum operating pressure is 1.0MPa.
The lock is spring-applied and air-released, holding the rod securely at the extended stroke end. It engages only after the cylinder has stopped. Unlock it automatically by supplying air to the release port, or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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