Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-30
The AirTAC SAIJ125X700-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136 N push force at 0.5 MPa. It features a carbon steel piston rod and PT tapered port threads. By integrating an external stopper at the rear, this model allows you to fine-tune the effective travel down from the 700 mm nominal stroke, creating a precise 670 to 700 mm usable window without swapping out the entire unit.
This adjuster functions strictly as a mechanical travel stop to set the retract end position and relies on the standard variable air cushion for deceleration; it is not a locking mechanism and will not hold a load without continuous live air pressure. For load-holding requirements without air pressure, consider an external pilot-operated check valve or the AirTAC SAIL lock cylinder series. The extruded aluminum barrel includes dual sensor grooves, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125X700-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125X700-30 Is Used
Machine Changeover
Dial in the 670-700 mm travel window during product size transitions to perfectly seat heavy components without repositioning physical hard stops.
Large Assembly Presses
Leverage the 6136 N push force at 0.5 MPa to seat large housings, using the rear adjuster to fine-tune the final clamp position.
Heavy Material Diversion
Actuate large diverter arms on high-capacity lines, relying on the 32 mm rod to handle substantial structural loads while trimming the stroke to match lane widths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-30 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application demands high thrust, such as the 6136 N push force at 0.5 MPa, alongside variable end-stop positioning during machine setup or product changeover. If your process requires less force, stepping down to an 80 mm bore yields 2513 N push force at 0.5 MPa. Conversely, heavier loads might necessitate a 160 mm bore providing 10053 N. The adjustable stroke is chosen over a fixed SAI cylinder when you need on-the-fly end-position tuning rather than a rigid, fixed travel distance.
Because this configuration features a 700 mm stroke, the extended rod is subject to increased side-loading risks; an external guide mechanism is highly recommended to prevent premature seal wear. To achieve a true ISO 15552 replacement match, verify the 125 mm bore, 700 mm stroke, 30 mm adjustment, PT port threads, and the required mounting style. Note that this standard version lacks a magnet, so position sensing via CMSE or DMSE switches is not supported without specifying the -S option.
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 SAIJ125X700-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective travel from the 700 mm nominal stroke down to 670 mm. It only sets the end position and does not lock the load without live air pressure.
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