Airtac SAILB Rear Lock Cylinder SAILB80X700
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB80X700 is a genuine double-acting ISO 15552 profile cylinder with a Ø80mm bore, 700mm stroke and a built-in spring-applied, air-released mechanical lock in the back cover — it holds the load at the retracted (rod-in) stroke end even when air is lost.
- BoreØ80 mm
- Stroke700 mm
- Port sizeG3/8
- Lock positionBack cover
- Rod threadM20×1.5
- UnlockAir + manual
About the Airtac SAILB Rear Lock Cylinder SAILB80X700
The AirTAC SAILB80X700 is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock housed in the back cover. Because this is a SAILB configuration, the spring-applied, air-released lock engages precisely when the piston reaches the retracted stroke end, securely holding the rod-in position. It delivers a robust 2513N push force at 0.5MPa and utilizes a carbon steel rod for durable operation.
This 80mm bore unit uses a 3/8 PT port and operates at speeds between 30 and 800 mm/s. The variable air cushion at the locker end is 22.5mm, intentionally shorter than the 36mm cushion on the free end to accommodate the locking mechanism. The lock is a static holding device that engages only after the cylinder stops; it is not a dynamic brake for a moving rod.
Airtac SAILB Rear Lock Cylinder SAILB80X700 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB80X700 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø80 mm |
| Stroke | 700 mm |
| Acting type | Double acting, with lock |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Lock type | Spring-applied, air-released (back 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 retracted (rod-in) 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 back-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 SAILB Rear Lock Cylinder SAILB80X700 Is Used
Vertical Lift Hold
Maintains a raised platform securely in the retracted position during unexpected air pressure loss.
Pallet Stop
Locks a stopper blade in the retracted end-state to keep a conveyor lane clear without consuming live air.
Safety Gate
Holds a safety barrier open in the rod-in position until a controlled air signal releases the lock.
Is the Airtac SAILB Rear Lock Cylinder SAILB80X700 the Right Lock Cylinder?
Choose this 80mm bore when an application requires 2513N of push force at 0.5MPa, or step down to a 63mm bore providing 1559N if the load is lighter. Select this SAILB variant specifically when the load must be secured in the retracted position upon power loss. If your sequence requires clamping at an arbitrary mid-stroke point, the BSAI clamp-lock cylinder is the correct choice instead, as the SAIL lock only functions at the stroke terminal.
For safe operation, avoid using fast-exhaust valves with this lock cylinder; back-pressure on the locker side can unintentionally release the lock, so an independent-exhaust solenoid valve is required. Because the 700mm stroke exceeds 300mm, implement an external guide to prevent excessive side-load wear on the seals. When replacing, match the 80mm bore, 700mm stroke, back locker position, 3/8 PT port, and mounting type. Without the -S magnet option, this unit cannot host CMSE reed or DMSE electronic sensors.
Quick checklist
- ✓ Hold needed at the retracted (rod-in) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILB Rear Lock Cylinder SAILB80X700 FAQ
At 0.5MPa, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.7MPa, the push force increases to 3518N.
The lock is spring-applied and air-released, engaging automatically when the rod reaches the retracted stroke end in the back cover. It provides a static hold after the cylinder stops and is unlocked by supplying release air or using the manual lever.
Related AirTAC Lock & Standard Cylinders
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