Airtac SAILB Rear Lock Cylinder SAILB100X80S
The AirTAC SAILB Rear Lock Cylinder SAILB100X80S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 80mm 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.
- BoreØ100 mm
- Stroke80 mm
- Port sizeG1/2
- Lock positionBack 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 SAILB Rear Lock Cylinder SAILB100X80S
The AirTAC SAILB100X80-S is a double-acting ISO 15552 profile cylinder featuring a built-in mechanical lock in the back cover. Because the lock is spring-applied and air-released, cutting the release air drives a lock pin into the carbon steel rod, securely holding the load at the retracted stroke end without requiring live pressure. In the 100mm bore class, this pneumatic actuator generates 3927N of push thrust and 3681N of pull thrust at 0.5 MPa, making it well-suited for heavy vertical lifting tasks.
This model includes a magnetic piston (-S) for precise position sensing using AirTAC CMSE reed switches or DMSE solid-state electronic sensors. The variable air cushion at the locker end is 24mm, which is intentionally shorter than the 36mm cushion at the free end to accommodate the locking mechanism. You can unlock the rod automatically by supplying air to the release port, or use the manual release lever during maintenance.
Airtac SAILB Rear Lock Cylinder SAILB100X80S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X80S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 80 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| 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 / 24 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SAILB100X80S Is Used
Vertical Lift Safety
Holds heavy lifted loads securely at the top retracted position instantly upon air pressure loss, preventing sudden crashes in vertical material handling systems.
Clamp and Hold
Maintains high-force clamping pressure on heavy machined parts at the stroke end without continuously consuming compressed air during extended machining cycles.
Gate Safety Lock
Secures heavy safety gates and machine guards in the closed retracted position during power outages, requiring an intentional air release to open.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X80S the Right Lock Cylinder?
Select this 100mm bore cylinder when an application demands robust load-holding at the fully retracted position; if your process requires less force, stepping down to an 80mm bore yields 2268N of pull at 0.5 MPa. Choose this SAILB configuration to secure the rod-in end, whereas a SAILF variant would hold the extended end. If your machinery needs to freeze the load at an arbitrary mid-stroke point rather than a stroke terminal, select a BSAI clamp-lock cylinder instead. The SAIL lock is a static holding device that engages only after the piston stops, not a dynamic brake for a moving rod.
When ordering a replacement, verify the 100mm bore, 80mm stroke, back locker position, PT tapered port threads, and the -S magnet option. To maintain lock integrity, never use a fast-exhaust valve with this cylinder; an independent-exhaust solenoid valve is required because back-pressure on the locker side can accidentally release the lock. For any safety-critical lifting application where human injury or severe damage could occur if the load drops, always add an independent mechanical safety measure alongside the pneumatic lock.
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 SAILB100X80S FAQ
At 0.5 MPa, this 100mm bore double-acting cylinder provides 3927N of push thrust and 3681N of pull thrust. At a maximum 1.0 MPa operating pressure, it achieves up to 801 kgf of push force.
The lock is spring-applied and engages automatically when the piston reaches the retracted stroke end in the back cover. To unlock it, you supply air to the release port for automatic retraction or use the manual release lever. It is a static lock that holds after stopping, not a mid-stroke clamp.
Related AirTAC Lock & Standard Cylinders
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