Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X75S
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X75S is a genuine double-acting ISO 15552 profile cylinder with a Ø50mm 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.
- BoreØ50 mm
- Stroke75 mm
- Port sizeG1/4
- 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 SAILF50X75S
The AirTAC SAILF50X75-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the front cover. A spring-applied, air-released lock engages when the piston reaches the extended stroke end, securely holding the load without requiring live pressure. You can unlock it automatically by supplying air to the release port or by using the manual release lever. At 0.5 MPa, this 50 mm bore generates 982 N of push force and 825 N of pull force, operating smoothly at speeds of 30-800 mm/s.
This model includes a magnetic piston (-S) for precise position sensing with AirTAC CMSE reed switches or DMSE solid-state electronic sensors. The variable air cushion at the front lock end is 20 mm, intentionally shorter than the 30 mm cushion at the free end to accommodate the locking mechanism. The standard carbon steel rod provides robust side-load resistance, and the PT tapered port threads ensure a reliable pneumatic seal.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X75S Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X75S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø50 mm |
| Stroke | 75 mm |
| Acting type | Double acting, with lock |
| Port size | G1/4 |
| 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 / 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SAILF50X75S Is Used
Vertical Lift Safety
Holds a raised load securely at the extended stroke end during a power loss, preventing sudden drops in vertical lifting rigs.
Pallet Stopper
Locks a stopper pin in the extended position to halt heavy pallets on a conveyor line without consuming continuous air pressure.
Clamp and Hold
Maintains outward clamping pressure on a workpiece at the stroke terminal, ensuring the part stays fixed during machining.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X75S the Right Lock Cylinder?
Choose this 50 mm bore when your application requires 982 N push force at 0.5 MPa; if you need less force, step down to a 40 mm bore (628 N), or step up to a 63 mm bore (1559 N) for heavier loads. Select the SAILF configuration to hold the rod securely at the extended stroke end; choose SAILB if you need holding force at the retracted end. If your process requires clamping at an arbitrary mid-stroke position rather than the stroke terminal, select the BSAI clamp-lock cylinder instead.
Remember that this lock is a static holding device that engages after the cylinder stops, not a dynamic brake for a moving rod. Never use a fast-exhaust valve with this lock cylinder; always use an independent-exhaust solenoid valve, because back-pressure on the locker side can accidentally release the lock. For safety-critical lifting applications where human safety depends on the load staying up, add an independent safety measure as well. Replacement parts must match the 50 mm bore, 75 mm stroke, front lock position, PT port threads, and -S magnet specification.
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 SAILF50X75S FAQ
At a 0.5 MPa operating pressure, the 50 mm bore provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The lock is spring-applied and air-released, engaging only when the rod reaches the extended stroke end. It provides a static hold after the cylinder stops, not a mid-stroke clamp. Unlock it automatically via the air release port or manually via the lever.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac SAILF Front Locking Pneumatic Cylinder SAILF50X75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.