Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-75S 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 SAIJ125AX210-75S
The AirTAC SAIJ125X210-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster. It provides a usable travel window of 135 to 210 mm, enabling precise end-position tuning at commissioning without swapping out the unit. It delivers 6136 N of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant features a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the standard PT tapered ports ensure a reliable, leak-free connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-75S |
|---|---|
| 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 SAIJ125AX210-75S
| 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 SAIJ125AX210-75S Is Used
Product Size Changeover
Dial in the 135-210 mm travel window during line changeovers to accommodate varying package lengths without physically swapping the cylinder.
Heavy-Duty End Tuning
Leverage the 6136 N pull force and fine-tune the retract stop position during machine commissioning to guarantee precise mechanical indexing.
Corrosive Assembly Lines
Utilize the SUS420J2 stainless steel rod and dual sensor grooves for reliable position feedback in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX210-75S the Right Cylinder?
Choose this 125 mm bore actuator when an application requires substantial thrust, such as 6136 N pull or 1559 N at 0.5 MPa. If your setup needs less force, stepping down to a 100 mm bore yields 3681 N pull, while upgrading to a 160 mm bore provides 9425 N pull. The 75 mm adjustment range is ideal for product-size changeovers on a line, allowing operators to dial in the exact stroke without adding external stops. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider a SAIL or BSAI cylinder. For a direct ISO 15552 replacement, match the 125 mm bore, 210 mm stroke, 75 mm adjustment, PT G1/2 port, and -S magnet.
Because the 210 mm stroke is relatively long for this bore size, ensure proper external guidance to prevent excessive side-loading on the SUS420J2 rod. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR configurations.
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 SAIJ125AX210-75S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. It can deliver up to 11045 N push at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to trim the 210 mm nominal stroke back by up to 75 mm. This creates a usable travel window of 135 to 210 mm for fine-tuning end positions without replacing the cylinder.
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