Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 260mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S
The AirTAC SAIJ125X260-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 230 to 260 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors.
A defining feature of this SAIJ series is the external rear stopper, which allows technicians to fine-tune the retract end-position during commissioning without swapping the cylinder or adding external stops. The adjuster acts purely as a travel stop, meaning it decelerates the stroke end but will not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 260 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×260 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S Is Used
Machine Changeover
Dial in the exact retract position within the 230-260 mm window during product format changes without physically swapping cylinders.
Heavy-Duty End Stops
Leverage the 6136 N push force to move heavy pallets while using the rear adjuster to tune the final stopping distance.
Sensor-Driven Positioning
Utilize the integrated magnet with DMSE solid-state sensors to confirm end-of-stroke arrival at the adjusted mechanical stop.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust, such as the 6136 N push or 5734 N pull at 0.5 MPa, combined with variable end-stop positioning. If your setup demands less force, stepping down to a 100 mm bore yields 3927 N push force, whereas moving up to a 160 mm bore provides 10053 N. The adjustable 230-260 mm travel window is ideal for product-size changeovers on a line, preventing the need to maintain separate fixed-stroke SAI cylinders for every variation.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 260 mm nominal stroke, 30 mm adjustment range, PT tapered port thread, and the -S magnet requirement. This model operates at speeds of 30-500 mm/s. Although the 32 mm diameter carbon steel rod and M27x2 thread handle high axial loads well, any stroke over 300 mm requires an external guide to prevent side-load damage.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-30S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. The maximum thrust is 1251 kgf at 1.0 MPa.
No, the rear adjuster functions only as a travel stop to set the end position within the 230-260 mm window. It does not lock or hold the load without live air pressure; for load-holding, use an SAIL or BSAI cylinder.
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