Airtac SILF Front Locking Air Cylinder SILF50X125
Genuine AirTAC ø50 mm end-lock iso 15552 cylinder, order code SILF50X125 from the SIL50 range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- Stroke125 mm
- MountingBasic (no mounting)
- VersionFront lock (F) · - · PT
- Bore sizeØ50 mm
- Stock strokes10 – 1200 mm
- Catalog standard strokeup to 1200 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 SILF50X125
The AirTAC SILF50X125 gives 125 mm of travel on the 50 mm bore end-lock platform: a double-acting ISO 15552 body, a 20 mm piston rod and the lock built into the front (rod-end) cover. While the lock-side port is exhausted the piston is mechanically held at that end, so a rod-extended clamp stays clamped through an air loss; air on the port or a flick of the hand lever releases it. Output is 982 N push and 825 N pull at 0.5 MPa, rising to 1374 N push and 1155 N pull at 0.7 MPa.
This code ships as SAILF50X125: the SILF/SILB series is discontinued and every order is filled with the current SAILF counterpart under the same suffix. The figures quoted here, from the 1/4" PT ports and M16x1.5 rod thread to the 0.15 to 1.0 MPa pressure band, 30 to 800 mm/s speed and -20 to +70 C limits, are those of the replacement SAILF50X125 cylinder.
Airtac SILF Front Locking Air Cylinder SILF50X125 Technical Specifications
| Order code | SILF50X125 |
|---|---|
| Product | Ø50 mm end-lock ISO 15552 cylinder |
| Stroke | 125 mm |
| Mounting | Basic (no mounting) |
| Version | Front lock (F) · - · PT |
| Bore size | Ø50 mm |
|---|---|
| Stock strokes | 10 – 1200 mm |
| Catalog standard stroke | up to 1200 mm (longer on request) |
| Acting type | Double acting, with end lock |
| Lock position | Front cover (F) |
| Lock release | Automatic (air on the lock-side port) or manual lever |
| Port size | 1/4" (PT standard) |
| Piston rod / rod thread | Ø20 mm / M16×1.5 |
| 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
SILF50X125 is the most compact of the three strokes listed here: 125 mm of held travel with the body clamped through its own basic mounting holes, no magnet and 1/4" PT threads. Step up to SILF50X150 or SILF50X160 only if the machine truly needs the extra travel, since each added millimetre lengthens the body and raises air consumption without adding force. Add CA for a single clevis (SILF50X125CA), TC for a center trunnion (SILF50X125TC), S for a position-sensor magnet, or G for G (BSPP) port threads.
Applications
Clamp-and-hold fixtures
With the M16x1.5 rod thread carrying a clamp arm, SILF50X125 keeps a workpiece gripped at the front cover even when the circuit loses air, releasing on air pressure or the manual lever.
Compact pick-and-place slide
The 125 mm stroke suits short-reach indexing in tight machine frames, while the 30 to 800 mm/s range and adjustable air cushions tune approach and landing speed.
Manual-release maintenance access
During fixture changes or jam clearing, technicians can unlock the front cover lock by hand without rebuilding air pressure on the lock-side port.
FAQ
Which figures define the SILF50X125 in one place?
Bore 50 mm, stroke 125 mm, rod Dia 20 mm, rod thread M16x1.5, ports 1/4" PT, operating pressure 0.15 to 1.0 MPa with 1.5 MPa proof, temperature -20 to +70 C, speed 30 to 800 mm/s, adjustable air cushions, front-cover end lock, basic mounting and no magnet. Force at 0.5 MPa is 982 N push / 825 N pull and at 0.7 MPa 1374 N push / 1155 N pull; the catalog states no holding force for the lock.
Is the SILF50X125 still available as an original SIL series unit?
No. AirTAC discontinued the SILF/SILB series, so SILF50X125 ships as SAILF50X125, the identical order code with the current series prefix. Everything described here, including the 125 mm stroke and front lock, refers to the replacement SAILF50X125 unit the buyer receives.