Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 200mm 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
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30
The AirTAC SAIJ125X200-30 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stroke adjuster. It provides a 170-200 mm usable travel window, allowing you to trim the nominal 200 mm stroke by up to 30 mm during commissioning. Equipped with a SUS420J2 stainless steel rod, it delivers 6136 N push force at 0.5 MPa.
This extruded aluminum profile cylinder includes PT tapered port threads (G1/2) and variable air cushions at both ends. The rear stopper mechanism sets the retract end position precisely without requiring external stops, while the dual-side sensor grooves accommodate CMSE reed and DMSE electronic switches if a magnet is added later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAIJ125AX200-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SAIJ125AX200-30 Is Used
Machine Changeover
Dial in the 170-200 mm travel window during product size changes to set new retract positions without swapping cylinders or adding external stopper blocks.
End-Position Tuning
Fine-tune the final retract position during commissioning using the 30 mm rear adjustment screw, perfecting machine timing without physical rework.
Heavy Assembly Pressing
Leverage the 6136 N push force at 0.5 MPa to seat heavy components, using the adjustable stroke to accommodate varying part tolerances.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX200-30 the Right Cylinder?
Select this 125 mm bore when an application requires heavy thrust (6136 N at 0.5 MPa) but demands on-the-fly end-position tuning. If your setup only needs 4523 N, stepping down to an 80 mm bore saves space, but the 125 mm bore is ideal for large product changeovers where the 30 mm adjustment window prevents mechanical rework.
When specifying the SAIJ125X200-30, match the PT port thread, choose from the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set, and note that no magnet is present. For strokes of 300 mm or more, an external guide is recommended to handle side loads, though this 200 mm stroke is well within standard limits. The rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series.
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 SAIJ125AX200-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 8590 N push force at 0.7 MPa.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from 200 mm down to 170 mm. It is a travel stop for end-position tuning, not a lock, and the cylinder requires live air to hold the load.
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