Airtac SAILB Rear Lock Cylinder SAILB100X350
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X350 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 SAILB100X350
The AirTAC SAILB100X350 is a double-acting ISO 15552 profile cylinder equipped with a spring-applied, air-released mechanical lock in the back cover. This lock engages automatically to hold the rod securely at the retracted stroke end whenever release air is cut, delivering 3927N of thrust at 0.5 MPa without needing live pressure.
The 100mm bore uses a 1/2 PT port and a 25mm carbon steel rod. Because the lock occupies the back end, the variable air cushion there is shorter at 24mm compared to the 36mm cushion on the free end. For position sensing, adding a magnet allows the use of AirTAC CMSE reed or DMSE electronic switches.
Airtac SAILB Rear Lock Cylinder SAILB100X350 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X350 |
|---|---|
| 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 SAILB100X350 Is Used
Vertical Lift Safety
Holds a lifted load securely at the retracted stroke end on the back cover side during a power loss event, preventing sudden drops.
Clamp and Hold
Maintains solid clamping force at the retracted terminal position without consuming continuous compressed air.
Gate Positioning
Keeps heavy industrial gates locked in the closed position using the spring-applied mechanical lock until air is supplied.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X350 the Right Lock Cylinder?
Choose this 100mm bore when 80mm (2513N at 0.5 MPa) is insufficient, or drop to 80mm if your load is lighter. Select SAILB to hold the retracted rod-end, and SAILF to hold the extended rod-out position. If your application requires clamping at an arbitrary mid-stroke point rather than a stroke-end hold, use the BSAI clamp-lock cylinder instead.
This lock is a static holding device that engages after the cylinder stops, not a dynamic brake. Avoid fast-exhaust valves; use an independent-exhaust solenoid valve because back-pressure on the locker side can unintentionally release the lock. For human-safety critical loads, add an independent safety measure. At 350mm stroke, guide the rod carefully to prevent excessive side-loading. Replacement requires matching the 100mm bore, 350mm stroke, PT port, back locker position, and mounting style.
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 SAILB100X350 FAQ
At 0.5 MPa operating pressure, the 100mm bore provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The lock is spring-applied and air-released, holding the rod statically at the retracted stroke end. It is not a mid-stroke clamp or a dynamic brake. It unlocks automatically via air or manually via a lever, and requires an independent-exhaust solenoid valve to prevent back-pressure from releasing the lock.
Related AirTAC Lock & Standard Cylinders
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