Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X75
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X75 is a genuine double-acting ISO 15552 profile cylinder with a Ø63mm bore, 75mm 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.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Lock positionFront cover
- Rod threadM16×1.5
- 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 SAILF63X75
The AirTAC SAILF63X75 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the front cover. Because the lock engages when the piston reaches the extended stroke end, it secures the rod-out position and holds the load without requiring live air pressure. At 0.7 MPa this 63 mm bore generates 2182 N of push force, making it well suited for mid-weight holding tasks.
Unlike a standard SAI cylinder, this model provides true power-failure safety. The variable air cushion at the locker end is 21 mm, intentionally shorter than the 30 mm cushion on the free end to accommodate the locking mechanism. The carbon steel rod uses an M16x1.5 thread, and adding a -S magnet enables tracking via AirTAC CMSE reed or DMSE electronic sensors.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X75 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X75 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø63 mm |
| Stroke | 75 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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 (30 mm free end / 21 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SAILF63X75 Is Used
Vertical Lift Hold
Secures a raised load in the extended position automatically when air pressure is removed, preventing sudden drops during power loss.
Clamp and Hold
Maintains consistent clamping force at the end of the outward stroke without consuming continuous compressed air.
Gate Safety Lock
Keeps heavy safety gates and barriers firmly open and locked at full extension until a deliberate air release signal is sent.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF63X75 the Right Lock Cylinder?
Choose this specific SAILF variant when your application requires the load to be safely held in the extended (rod-out) position; for holding the retracted position, select a SAILB model instead. If your process requires locking at an arbitrary mid-stroke point rather than a stroke end, the AirTAC BSAI clamp-lock cylinder is the correct choice. The 63 mm bore delivers 1402 N of pull force at 0.5 MPa; step up to the 80 mm bore if you need 2268 N of pull, or down to the 50 mm bore for lighter 825 N loads.
The lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Valve selection is critical: do not use a fast-exhaust valve, as back-pressure on the locker side can unintentionally release the lock. Always use an independent-exhaust solenoid valve. If human safety depends on the load remaining extended, add an independent safety measure. Replacement requires matching the 75 mm stroke, front locker position, 3/8 PT port, and your mounting style.
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 SAILF63X75 FAQ
The 63 mm bore generates 1559 N of push and 1402 N of pull at 0.5 MPa. At 0.7 MPa, the push force increases to 2182 N, and it reaches a maximum of 2805 N at 0.9 MPa.
The lock is spring-applied and air-released, engaging automatically when the rod reaches the extended stroke end to hold the load statically. It unlocks by supplying air to the release port or by using the manual override lever.
Related AirTAC Lock & Standard Cylinders
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