Airtac SILF Front Locking Air Cylinder SILF125X80S
Genuine AirTAC ø125 mm end-lock iso 15552 cylinder, order code SILF125X80S from the SIL125 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- Stroke80 mm
- MountingBasic (no mounting)
- VersionFront lock (F) · S · PT
- Bore sizeØ125 mm
- Stock strokes25 – 1150 mm
- Catalog standard strokeup to 1500 mm (longer on request)
- 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 SILF Front Locking Air Cylinder SILF125X80S
The SILF125X80S is a 125 mm bore double-acting end-lock cylinder in the ISO 15552 envelope, ordered with an 80 mm stroke, the lock built into the front (rod-end) cover, and the S option that fits a magnet for position sensors. The series is discontinued: AirTAC supplies this code as the current SAILF125X80S, same code after the prefix, so the cylinder you receive carries the replacement series specifications. At 0.5 MPa it delivers 6136 N push and 5734 N pull, rising to 8590 N and 8027 N at 0.7 MPa.
The front lock holds the piston at the rod-end cover while the lock-side port is exhausted, keeping the rod in place if air supply is lost; air on that port releases it automatically and a hand lever releases it manually. The unit shares the series hardware: 1/2" PT ports, an M27x2 thread on the 32 mm piston rod, adjustable air cushions, and operation on 40 um filtered air from 0.15 to 1.0 MPa (proof 1.5 MPa) between -20 and +70 C at 30 to 800 mm/s. This basic version has no added mounting code, so it fixes through the cylinder's own mounting holes.
Airtac SILF Front Locking Air Cylinder SILF125X80S Technical Specifications
| Order code | SILF125X80S |
|---|---|
| Product | Ø125 mm end-lock ISO 15552 cylinder |
| Stroke | 80 mm |
| Mounting | Basic (no mounting) |
| Version | Front lock (F) · S · PT |
| Bore size | Ø125 mm |
|---|---|
| Stock strokes | 25 – 1150 mm |
| Catalog standard stroke | up to 1500 mm (longer on request) |
| Acting type | Double acting, with end lock |
| Lock position | Front cover (F) or rear cover (B) |
| Lock release | Automatic (air on the lock-side port) or manual lever |
| Port size | 1/2" (PT standard) |
| Piston rod / rod thread | Ø32 mm / M27×2 |
| Fluid | Air (filtered by 40 µm element) |
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushions |
Source: AirTAC Products Catalog 2026A (PDF01-P0376/P0377), SAIL specifications and ordering code; body as SAI. The SILF/SILB series is discontinued; these are the SAILF/SAILB specifications.
How to choose
Choose SILF125X80S when your travel is 80 mm, the load must be held at the rod-end cover, and you need position feedback: the S magnet pairs with the sensors you select, while the sibling SILF125X80 without S has no magnet. If the load should be held at the rear cover instead, order the rear-lock SILB125X80S. This code is basic mounted; for rigid line fixing add LB foot or FA front flange versions, or CB, TC and FTC for pivoting loads. The G option switches ports from PT to G (BSPP).
Applications
Power-off clamping on press fixtures
The front-cover lock keeps the rod extended at the workpiece when the lock-side port is exhausted, so an 80 mm clamping move stays put during a supply drop; the S magnet lets a sensor confirm the locked position.
Vertical hold on a short-lift station
A compact 80 mm vertical lift where the load must not fall on air loss: the lock engages at the rod-end cover, and a hand lever can release it manually for maintenance.
Sensor-monitored slide on a basic mount
An 80 mm slide driven by the 125 mm bore (8590 N push at 0.7 MPa), fixed through the cylinder body, with the built-in magnet sending end-position signals to the PLC.
FAQ
What are the key figures for the SILF125X80S?
125 mm bore with a 32 mm rod, 80 mm stroke, front (rod-end) end lock with automatic air release and manual lever, built-in magnet (S), basic mounting, 1/2" PT ports, M27x2 rod thread, adjustable air cushions, 0.15 to 1.0 MPa working pressure (proof 1.5 MPa), -20 to +70 C, 30 to 800 mm/s, output 6136 N push / 5734 N pull at 0.5 MPa and 8590 N push / 8027 N pull at 0.7 MPa.
I ordered SILF125X80S - will I receive an old-series cylinder?
No. AirTAC has discontinued the SILF/SILB series and supplies this code as the current SAILF125X80S, with the same code after the prefix. The specifications listed here are those of the SAILF125X80S you receive, and they cover the lock, stroke, magnet and port details you ordered.