Airtac SAILB Rear Lock Cylinder SAILB100X350S
The AirTAC SAILB Rear Lock Cylinder SAILB100X350S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 350mm 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
- Stroke350 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 SAILB100X350S
The AirTAC SAILB100X350-S is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the back cover. It securely holds the rod at the retracted stroke end, dropping a locking pin automatically when release air is cut. In the 100mm bore class, it delivers a 0.5 MPa push force of 3927 N and a pull force of 3681 N, making it robust enough for heavy load-holding tasks.
This model includes a magnetic piston (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The variable air cushion at the locker end is 24 mm, intentionally shorter than the 36 mm cushion on the free end to accommodate the locking hardware. Standard carbon steel rod material provides durable service, and the cylinder utilizes PT tapered port threads.
Airtac SAILB Rear Lock Cylinder SAILB100X350S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X350S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAILB100X350S Is Used
Vertical Lift Safety
Prevents heavy elevated platforms from dropping when air pressure is lost, securing the load safely at the retracted stroke end.
Pallet Hold
Locks a retracted stopper pin rigidly in place to halt heavy pallet traffic on a conveyor without consuming continuous air.
Safety Gate Lock
Keeps machine access gates firmly secured in the closed position during operation, releasing only when the release port is pressurized.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X350S the Right Lock Cylinder?
Select this 100mm bore when an application demands reliable static holding at the retracted position without relying on live air pressure. If your load requires less force, stepping down to an 80mm bore yields 2513 N of push at 0.5 MPa; for heavier lifting, a 125mm bore provides 6136 N. Choose this SAILB variant specifically to secure the rod-in position. If your process requires clamping at an arbitrary mid-stroke point, the BSAI clamp-lock cylinder is the correct alternative.
Because the stroke is 350 mm, ensure adequate external guide rails to prevent excessive side-loading on the rod. Remember that this lock engages only after the cylinder has stopped, functioning as a static hold rather than a dynamic brake. Avoid using fast-exhaust valves; an independent-exhaust solenoid valve is required, as back-pressure on the locker side can inadvertently release the lock. For safety-critical suspended loads, always add an independent mechanical safety measure. Replacement specifications: 100mm bore, 350mm stroke, back locker, PT ports, magnetic piston (-S), and full ISO 15552 mounting compatibility.
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 SAILB100X350S FAQ
At a standard 0.5 MPa operating pressure, the 100mm bore provides a push force of 3927 N and a pull force of 3681 N. At 0.7 MPa, the push force increases to 5497 N.
The lock is spring-applied and air-released, located in the back cover to hold the rod only at the retracted stroke end. It engages statically after the piston stops. To unlock, you supply air to the release port or use the manual release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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