Airtac SAILB Rear Lock Cylinder SAILB100X75S
The AirTAC SAILB Rear Lock Cylinder SAILB100X75S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 75mm 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
- Stroke75 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 SAILB100X75S
The AirTAC SAILB100X75-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 pin into the rod, securely holding the load at the retracted stroke end without consuming live pressure. In the 100mm bore class, it delivers 3927N of push force and 3681N of pull force at 0.5 MPa, making it well-suited for heavy vertical lifting tasks.
This model includes a magnet for position sensing and is compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. To accommodate the locking hardware, the variable air cushion at the locker end is shorter (24mm) compared to the 36mm cushion on the free end. The standard carbon steel rod features an M20x1.5 thread, and the unit uses a 1/2 PT tapered port.
Airtac SAILB Rear Lock Cylinder SAILB100X75S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X75S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 75 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 SAILB100X75S Is Used
Vertical Lift Holding
Maintains a raised load at the retracted stroke end during a power loss event, relying on the mechanical lock rather than continuous air pressure.
Safety Gate Closure
Secures a heavy barrier in the retracted position until an intentional air signal releases the pin for safe operation.
Press Clamping
Holds a workpiece firmly at the stroke terminal while downstream machining or assembly operations are completed.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X75S the Right Lock Cylinder?
Select this 100mm bore when an application requires substantial end-of-stroke holding power that a plain SAI cylinder cannot provide. If your mechanism demands clamping at an arbitrary mid-stroke position rather than a static hold at the retracted end, the BSAI clamp-lock cylinder is the correct alternative. For safety-critical lifting applications, always add an independent mechanical safety measure, as this lock is a static holding device that engages after the rod stops, not a dynamic brake.
When specifying a replacement, verify the 100mm bore, 75mm stroke, back locker position, 1/2 PT port, and the -S magnet option. To ensure the lock functions reliably, avoid using a fast-exhaust valve; instead, use an independent-exhaust solenoid valve, because back-pressure on the locker side can inadvertently release the spring-driven pin.
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 SAILB100X75S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder generates 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. It engages statically to hold the rod only at the retracted stroke end in the back cover. To unlock, you supply air to the release port for automatic retraction or use the manual release lever.
Related AirTAC Lock & Standard Cylinders
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