Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-10
The AirTAC SAIJ125X240-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 10 mm. This yields a usable 230-240 mm travel window, letting you dial in the exact end position during commissioning without adding external stops. Built with an extruded aluminum barrel, it is dimensionally interchangeable with ISO 15552 cylinders.
In this 125 mm bore class, the carbon steel rod generates a substantial 6136 N of push force and 5734 N of pull force at 0.5 MPa, scaling up to 11045 N push at 0.9 MPa. The PT tapered porting and M27x2 rod thread are set by the bore size, while the integrated variable air cushions at both ends manage deceleration across the 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAIJ125X240-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAIJ125X240-10 Is Used
Machine Changeover
Fine-tune the 230-240 mm retract end-position during product size changeovers without physically replacing the cylinder or bolting on external stoppers.
Heavy Pressing
Leverage the 6136 N push force at 0.5 MPa for heavy pressing or clamping operations, with precise end-position tuning for consistent results.
Assembly Line Indexing
Index large components on an assembly line with the 125 mm bore's robust thrust, using the 10 mm adjustment to dial in the exact stopping point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-10 the Right Cylinder?
Choose this 125 mm bore when your application requires heavy thrust that a 100 mm bore (providing 3927 N push at 0.5 MPa) cannot supply, but a 160 mm bore would be excessive. The adjustable stroke is ideal for product-size changeovers on a line, where a 10 mm fine-tune window at the retract end saves time over swapping a fixed-stroke SAI cylinder.
For any mounting requirement, SAIJ supports a reduced set of ISO 15552 attachments: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because this is a plain cylinder, the rear adjuster acts only as a travel stop and does not hold the load without live air; for true position holding, consider the SAIL or BSAI series. At a 240 mm stroke, side loads are moderate, but ensure external guiding if the load is unsupported.
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 SAIJ125X240-10 FAQ
At 0.5 MPa, the SAIJ125X240-10 generates 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 240 mm nominal stroke by up to 10 mm, providing a usable travel window of 230-240 mm for fine-tuning the end position at commissioning.
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