Airtac SAILB Rear Lock Cylinder SAILB100X150S
The AirTAC SAILB Rear Lock Cylinder SAILB100X150S is a genuine double-acting ISO 15552 profile cylinder with a Ø100mm bore, 150mm 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
- Stroke150 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 SAILB100X150S
The AirTAC SAILB100X150-S 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 at the retracted stroke end, it securely holds the rod in the inward position without requiring continuous live air pressure. Equipped with a magnet for position sensing, this bore 100 model delivers a 0.5 MPa push force of 3927 N and a pull force of 3681 N, making it suitable for heavy load control.
The integrated lock differentiates this unit from a standard SAI cylinder, providing true static load holding rather than relying solely on the variable air cushions. Note that the cushion at the locker end is shorter (24 mm) than the free end (36 mm) to accommodate the locking mechanism. The carbon steel rod provides robust side-load resistance, and the automatic air-release port enables seamless integration into safety-centric pneumatic circuits.
Airtac SAILB Rear Lock Cylinder SAILB100X150S Technical Specifications
| Model | Airtac SAILB Rear Lock Cylinder SAILB100X150S |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø100 mm |
| Stroke | 150 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 SAILB100X150S Is Used
Vertical Lift Holding
Secures elevated loads in the retracted position automatically upon air pressure loss, preventing sudden drops in lifting fixtures.
Clamp and Secure
Maintains solid clamping force at the rod-in stroke end during machining operations, eliminating the need for continuous pneumatic energy.
Safety Gate Lock
Holds heavy safety gates or guards closed in the retracted terminal position until the air-release port is actively pressurized.
Is the Airtac SAILB Rear Lock Cylinder SAILB100X150S the Right Lock Cylinder?
Select this bore 100 cylinder when your application requires substantial retraction force (3927 N at 0.5 MPa) combined with fail-safe load holding at the rod-in position. If your load demands less force, stepping down to a bore 80 model provides 2513 N of push force; conversely, a bore 125 offers 6136 N for heavier requirements. Choose this SAILB configuration specifically when the load must be secured at the retracted stroke end, whereas a SAILF variant would hold the extended position.
Remember that this lock is a static holding device engaging after the piston stops, not a dynamic brake for a moving rod. If your process requires clamping at an arbitrary mid-stroke point, you must use a BSAI clamp-lock cylinder instead. Critical valve selection: do not use a fast-exhaust valve with this lock cylinder, as back-pressure on the locker side can inadvertently release the lock; always use an independent-exhaust solenoid valve. For human-safety critical lifting applications, add an independent mechanical safety measure. Replacement specifications: 100 mm bore, 150 mm stroke, back locker, PT port threads, double-acting operation, and an -S magnet for CMSE reed or DMSE electronic sensors.
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 SAILB100X150S FAQ
At a standard operating pressure of 0.5 MPa, this double-acting bore 100 cylinder 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 spring-applied, air-released lock is located in the back cover and engages only when the piston reaches the retracted stroke end. It holds the load statically without live pressure. To unlock, you supply air to the release port for automatic release or use the manual release lever. It does not clamp at mid-stroke.
Related AirTAC Lock & Standard Cylinders
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