Airtac SILF Front Locking Air Cylinder SILF125X50-S
Genuine AirTAC ø125 mm end-lock iso 15552 cylinder, order code SILF125X50-S from the SIL125 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- Stroke50 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 SILF125X50-S
The SILF125X50-S is the short-stroke, 50 mm version of the AirTAC SIL125 end-lock ISO 15552 cylinder, ordered with basic mounting, front cover lock, a built-in magnet for position sensing and 1/2 inch PT ports. AirTAC has discontinued the SILF/SILB series, so this code ships as SAILF125X50S - the same order code under the current SAILF prefix - and every specification below is that of the SAILF unit you receive.
With only 50 mm of travel on the 125 mm bore, this is the most compact SIL125 build on the page: a 0.5 MPa supply gives a theoretical 6136 N push and 5734 N pull (8590 N and 8027 N at 0.7 MPa), the same output as every longer stroke because force depends on bore and pressure only. The front cover lock holds the piston at the rod end while the lock-side port is exhausted; air on that port releases it automatically and a hand lever releases it manually. The piston rod is Dia 32 mm with an M27x2 thread, cushions are adjustable air cushions, and the cylinder runs on air filtered by a 40 um element at 0.15 to 1.0 MPa (proof 1.5 MPa) between -20 and +70 C at 30 to 800 mm/s.
Airtac SILF Front Locking Air Cylinder SILF125X50-S Technical Specifications
| Order code | SILF125X50-S |
|---|---|
| Product | Ø125 mm end-lock ISO 15552 cylinder |
| Stroke | 50 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 SILF125X50-S when the clamp or stopper travel is fixed and short: 50 mm keeps body length, weight and per-cycle air consumption to a minimum while still delivering the full 6136 N push of the 125 mm bore. If you need a little more reach step up to SILF125X100-S; the minimum SILF125X25-S serves very short duties. All three share basic mounting, front lock, magnet and PT ports. If the load must be held at the rear cover instead, order the B version, and drop the S if no sensor feedback is needed.
Applications
Fixture clamping with power-off hold
The 50 mm stroke is enough to swing a clamp arm onto a machined workpiece, and the front cover lock keeps it there if the 0.15 to 1.0 MPa supply drops.
Short-throw conveyor stopper
A 50 mm lift of a stop blade is enough to stop cartons on a roller line, and the built-in magnet feeds rod position back to the PLC.
Compact package push-off
Short, high-force nudges off an infeed rail use the 6136 N push at 0.5 MPa without the extra length a longer stroke would add.
FAQ
What are the key figures of the SILF125X50-S?
Bore 125 mm, stroke 50 mm, double acting with front cover end lock, piston rod Dia 32 mm with M27x2 thread, 1/2 inch PT ports, operating pressure 0.15 to 1.0 MPa (proof 1.5 MPa), temperature -20 to +70 C, speed 30 to 800 mm/s, adjustable air cushions, built-in magnet. Theoretical output: 6136 N push and 5734 N pull at 0.5 MPa; 8590 N push and 8027 N pull at 0.7 MPa.
Why does my order ship as SAILF125X50S instead of SILF125X50-S?
AirTAC has discontinued the SILF/SILB series and replaced it with SAILF/SAILB. The SILF125X50-S you order is supplied as SAILF125X50S - the same code with the new prefix - and the specifications listed here are those of that replacement unit.