Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20 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 SAIJ125AX260-20
The AirTAC SAIJ125X260-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 240-260mm usable travel window. Delivering 6136N of push force at 0.5MPa, it handles heavy loads while allowing precise end-position tuning during commissioning without external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This SKU is configured with a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and PT tapered port threads. It supports speeds of 30-500mm/s and uses a 32mm rod with an M27x2 thread, providing a robust interface that handles high side loads. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20 |
|---|---|
| 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 SAIJ125AX260-20
| 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 SAIJ125AX260-20 Is Used
Product Changeovers
Dial in the 240-260mm travel window during format changes on packaging lines, avoiding the need to physically swap out cylinders for different product sizes.
Machine Setup
Fine-tune the retract end-position at commissioning to perfectly mate heavy 6136N press tools without adding external mechanical stoppers.
Heavy Assembly
Leverage the robust 32mm M27x2 threaded rod and SUS420J2 stainless steel material to handle large fixture positioning in harsh industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-20 the Right Cylinder?
Choose this 125mm bore when a 100mm cylinder (3927N push at 0.5MPa) lacks thrust, but a 160mm bore (10053N) is excessive. The 20mm adjustment range is ideal for product changeovers on a line, letting you dial in the exact 240-260mm end-stop without swapping the cylinder. For load-holding without live air, select the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock.
As an ISO 15552 profile cylinder, it is dimensionally interchangeable with standard cylinders using the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting set, omitting FB, CA, CB, and CR. Since the 260mm stroke exceeds 300mm only slightly, side-load risks are minimal, but an external guide is recommended for heavy lateral forces. This model has no magnet; add the -S option if CMSE reed or DMSE electronic sensors are required.
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 SAIJ125AX260-20 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the nominal 260mm stroke by up to 20mm, providing a usable travel window of 240-260mm. It functions as a mechanical stop for end-position tuning and is not a locking device.
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