Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X700
The AirTAC Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X700 is a genuine double-acting ISO 15552 profile cylinder with a Ø125mm bore, 700mm stroke and a built-in spring-applied, air-released mechanical lock in the front cover — it holds the load at the extended (rod-out) stroke end even when air is lost.
- BoreØ125 mm
- Stroke700 mm
- Port sizeG1/2
- Lock positionFront cover
- Rod threadM27×2
- 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 SAILF Front Locking Pneumatic Cylinder SAILF125X700
The AirTAC SAILF125X700 is a double-acting ISO 15552 profile cylinder featuring a spring-applied, air-released mechanical lock built into the front cover. This mechanism engages when the piston reaches the extended stroke end, securely holding the rod out without relying on live air pressure. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, making it well-suited for heavy vertical load management.
Because this unit lacks the -S magnet option, it does not support CMSE reed or DMSE electronic sensors. The variable air cushion at the locker end is 24mm, which is shorter than the 40mm cushion on the non-lock end. A standard carbon steel rod provides robust durability, and the lock can be released automatically via air or manually via the lever.
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X700 Technical Specifications
| Model | Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X700 |
|---|---|
| Series | SAIL ISO 15552 cylinder with lock |
| Bore size | Ø125 mm |
| Stroke | 700 mm |
| Acting type | Double acting, with lock |
| Port size | G1/2 |
| Rod thread | M27×2 |
| Lock type | Spring-applied, air-released (front cover) |
|---|---|
| Unlock | Automatic (air) & manual |
| Operating pressure | 0.15 – 1.0 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable (40 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 extended (rod-out) 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 front-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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 SAILF Front Locking Pneumatic Cylinder SAILF125X700 Is Used
Overhead Lift Hold
Maintains a raised platform securely at the extended end during a power loss, preventing sudden drops in heavy material handling lifts.
Safety Gate Barrier
Locks a protective barrier in the open extended position without consuming continuous air, keeping access routes clear and safe.
Clamp and Hold
Secures heavy fabricated components at the stroke end for machining, holding the 125mm bore output firmly without live pressure.
Is the Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X700 the Right Lock Cylinder?
Choose this 125mm bore when 8590N of push force at 0.7 MPa is required; stepping down to an 80mm bore yields 3518N, while moving up to a 160mm bore provides 14074N. Select the SAILF configuration when the load must be held at the extended rod-out position, and choose SAILB for retracted holding. If your application requires locking at an arbitrary mid-stroke point rather than the stroke end, use the BSAI clamp-lock cylinder instead.
This SAIL lock is a static holding device, not a dynamic brake for a moving rod. Avoid using fast-exhaust valves, as back-pressure on the locker side can unintentionally release the lock; always use an independent-exhaust solenoid valve. For safety-critical suspended loads, add an independent mechanical safety measure. With a 700mm stroke, ensure adequate side-load support using a external guide rail to prevent rod binding. Replacement requires matching the 125mm bore, 700mm stroke, front locker position, PT port threads, and the chosen mounting style.
Quick checklist
- ✓ Hold needed at the extended (rod-out) end?
- ✓ Or lock anywhere → use BSAI
- ✓ Independent-exhaust valve fitted
- ✓ Port/thread type (PT/G)
- ✓ Extra safety measure for people
Airtac SAILF Front Locking Pneumatic Cylinder SAILF125X700 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The lock is spring-applied and air-released, engaging statically at the extended stroke end to hold the load without live pressure. It is not a mid-stroke clamp or dynamic brake. Unlocking is done automatically by supplying release air or manually via the lever.
Related AirTAC Lock & Standard Cylinders
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