Airtac SAILB Rear Lock Cylinder SAILB100X200
The AirTAC Airtac SAILB Rear Lock Cylinder SAILB100X200 is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 200mm 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
- Stroke200 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 SAILB100X200
The AirTAC SAILB100X200 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock housed in the back cover. Because the lock engages when the piston reaches the retracted stroke end, it secures the rod and any attached vertical load without requiring continuous live air pressure. In this 100mm bore class, the cylinder provides a robust 3927 Newtons of push force and 3681 Newtons of pull force at 0.5 MPa, making it suitable for heavy-duty holding tasks.
A key design feature of this SAILB variant is the asymmetric cushioning: the variable air cushion at the locker end is 24mm, deliberately shorter than the 36mm cushion on the free end, ensuring the lock engages cleanly without deceleration interference. The standard carbon steel rod offers high tensile strength for side-load resistance. To unlock the rod, operators can supply air to the release port for automatic retraction or use the manual release lever. For position sensing, adding a -S magnet enables compatibility with AirTAC CMSE reed and DMSE solid-state sensors.
Airtac SAILB Rear Lock Cylinder SAILB100X200 Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X200 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 200 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 SAILB100X200 Is Used
Overhead Lift Safety
Secures lifted loads at the retracted stroke end instantly upon air pressure loss, preventing sudden drops on heavy material handling hoists.
Clamp and Hold
Maintains high-force clamping pressure on large fabricated parts at the end of stroke without consuming continuous compressed air.
Gate and Door Control
Holds heavy industrial safety gates firmly closed in the retracted position during power outages or emergency stop events.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X200 the Right Lock Cylinder?
Select this 100mm bore when an application requires holding a heavy load at the fully retracted position on power loss, as the 3927N push force at 0.5 MPa easily handles substantial vertical weights. If your mechanism only needs to secure the load at the extended rod-out position, choose the SAILF100X200 front-locker version instead. Conversely, if the load must be clamped and held at an arbitrary mid-stroke point rather than a stroke terminal, the BSAI clamp-lock cylinder is the correct choice.
When specifying this model, confirm the 200mm stroke, 1/2 PT port threads, and the required mounting accessory from the ISO 15552 interchangeable set (Basic, FA, FB, CA, CB, CR, LB, TC, FTC, TCM1, TCM2). 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 cylinder, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. For safety-critical overhead loads, add an independent mechanical safety measure.
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 SAILB100X200 FAQ
At a standard operating pressure of 0.5 MPa, this 100mm bore cylinder generates 3927 Newtons of push force and 3681 Newtons of pull force. At the maximum operating pressure of 1.0 MPa, the push force reaches 801 kgf.
The lock is spring-applied and air-released, located in the back cover to hold the rod securely at the retracted stroke end. It engages statically after the piston stops and is unlocked automatically by supplying release air or manually via the release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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