Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-30S
The AirTAC SAIJ125X210-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 180 to 210 mm for precise end-position tuning. Driven by a 32 mm carbon steel rod with an M27x2 thread, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa. The integrated -S magnet enables position sensing with AirTAC CMSE reed or DMSE electronic switches.
This 125 mm bore actuator features PT tapered port threads (G1/2) and operates at speeds between 30 and 500 mm/s. The rear stopper allows you to dial in the exact retract distance during commissioning without adding external stops. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on some standard cylinders.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAIJ125X210-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAIJ125X210-30S Is Used
Product Changeovers
Dial in the 180-210 mm travel window during format size changes on packaging lines without swapping the physical actuator.
Machine Setup
Fine-tune the retract end-position at commissioning to achieve exact tooling alignment using the rear stopper screw.
Variable End Stops
Accommodate multiple part lengths in a single workstation by adjusting the stroke up to 30 mm as needed.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-30S the Right Cylinder?
Choose this 125 mm bore actuator when an application demands high thrust, such as 6136 N push at 0.5 MPa, alongside variable end-stop positioning. If you need less force, stepping down to a 100 mm bore yields 3927 N push, while upgrading to a 160 mm bore provides 10053 N for heavier loads. The adjustable stroke is ideal for product-size changeovers on a line, whereas a fixed SAI cylinder is better for static, unchanging end positions.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 210 mm nominal stroke, 30 mm adjustment range, PT port threads, and the -S magnet requirement. Because the 210 mm stroke is relatively long for this large bore, ensure adequate external guiding to prevent excessive rod side-loading. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an AirTAC SAIL or BSAI lock cylinder.
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 SAIJ125X210-30S FAQ
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke by up to 30 mm, creating a usable travel window of 180 to 210 mm. It allows fine-tuning of the retract position without changing the cylinder or adding external stops.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At the maximum rated pressure of 1.0 MPa, the push force reaches 1251 kgf.
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