Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X75
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X75 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm 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.
- BoreØ80 mm
- Stroke75 mm
- Port sizeG3/8
- Lock positionFront cover
- Rod threadM20×1.5
- 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 SAILF80X75
The AirTAC SAILF80X75 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. This spring-applied, air-released lock engages automatically when the piston reaches the extended stroke end, securely holding the load without requiring live air pressure. Delivering 2513N of push force at 0.5 MPa, it is built with a carbon steel rod and uses a PT tapered port.
Unlike a standard SAI cylinder, this model provides true static load holding at stroke termination. The front locker end features a variable air cushion of 22.5mm, which is intentionally shorter than the 36mm cushion on the rear free end to accommodate the locking hardware. Remember that the cushion only decelerates the moving load near the stroke end; it is the mechanical lock that actually holds the position.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X75 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X75 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 75 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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 (36 mm free end / 22.5 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SAILF80X75 Is Used
Vertical Lift Holding
Secures elevated platforms or forks in the extended position automatically during air pressure loss, preventing sudden drops.
Extended Clamp Safety
Maintains clamping force on a workpiece at the rod-out stroke end without consuming continuous compressed air.
Gate and Guard Locking
Keeps heavy safety gates and machine guards firmly open at the end of stroke until a controlled air signal releases the lock.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF80X75 the Right Lock Cylinder?
Choose this 80mm bore cylinder when an application demands 2513N of push force at 0.5 MPa and requires the load to be safely locked in the extended position. If your load demands less force, stepping down to a 63mm bore yields 1559N, while moving up to a 100mm bore provides 3927N. Select the SAILF variant specifically when the extended rod-out position is the safety-critical state; choose SAILB if the retracted position must be held instead. If you need to clamp and hold the rod at an arbitrary mid-stroke position rather than the stroke end, the BSAI clamp-lock cylinder is the correct choice.
For safe operation, never use a fast-exhaust valve with this lock cylinder, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. The lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. To match this hardware for a replacement, verify the 80mm bore, 75mm stroke, front locker position, PT port thread, and the absence of a magnet (-S). If human safety depends on the load staying extended, always add an independent mechanical safety measure as well.
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 SAILF80X75 FAQ
At 0.5 MPa operating pressure, the 80mm bore provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa, it delivers up to 513 kgf.
The lock is spring-applied and air-released, engaging only when the piston reaches the extended stroke end in the front cover. It provides a static hold, not a dynamic brake, and is unlocked automatically by supplying air to the release port or by using the manual release lever.
Related AirTAC Lock & Standard Cylinders
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