Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-40 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 SAIJ125X260-40
The AirTAC SAIJ125X260-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 260 mm stroke and a 40 mm adjustment range, it provides an effective travel window of 220-260 mm. This allows precise end-position tuning at commissioning without swapping the barrel or adding external stops. In the 125 mm bore class, it delivers 6136 N push force at 0.5 MPa, making it suited for heavy-duty positioning tasks.
The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. It features a 32 mm carbon steel rod and a PT tapered G1/2 port. The rear adjuster acts purely as a mechanical stop to set the retract position, so it does not hold the load without live air pressure. For load-holding requirements without continuous air, an external rod lock or related SAIL and BSAI series should be considered.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-40 |
|---|---|
| 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 SAIJ125X260-40
| 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 SAIJ125X260-40 Is Used
Adjustable Machine Stops
Dial in the exact retract position within the 220-260 mm window during machine setup or product changeover without changing the cylinder.
Variable Product Handling
Fine-tune the end-of-stroke position on packaging lines to accommodate different carton or product sizes quickly.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy jigs or fixtures, using the rear stopper to set precise motion limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-40 the Right Cylinder?
Choose this adjustable-stroke model when your application requires variable end-stops or frequent product-size changeovers. If 6136 N of push force at 0.5 MPa is excessive, stepping down to the 100 mm bore yields 3927 N. If more force is needed, the 160 mm bore provides 10053 N. The 125 mm bore operates at a standard speed range of 30-500 mm/s.
The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. At a 260 mm stroke, the 32 mm rod handles moderate side loads, but an external guide is recommended for heavy lateral forces. This cylinder is dimensionally interchangeable per ISO 15552, utilizing a PT port and standard carbon steel rod without a magnet.
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 SAIJ125X260-40 FAQ
At 0.5 MPa operating pressure, the 125 mm bore provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm from the 260 mm nominal length, creating a usable travel window of 220-260 mm. The adjuster is a mechanical stop, not a lock, meaning the cylinder requires live air to hold its position.
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