Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-75
The AirTAC SAIJ125X175-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a 125mm bore, a standard carbon steel rod with an M27x2 thread, and PT tapered ports. The integrated rear stopper allows you to dial back the 175mm nominal stroke by up to 75mm, creating a precise 100-175mm usable travel window for highly flexible machine setups.
This adjustable design eliminates the need to swap cylinders or bolt on external stops during product changeovers. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches, though a magnet is not included on this standard configuration. It utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125X175-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125X175-75 Is Used
Product Changeover
Quickly reconfigure the 100-175mm travel window on packaging lines to handle different carton or pallet sizes without changing the cylinder.
Commissioning Calibration
Fine-tune the exact retract end-position during machine setup to prevent mechanical crashes, using the rear screw rather than adding external spacers.
Variable End Stops
Provide adjustable physical stops for heavy-duty forming or pressing tasks where the final 75mm of travel needs periodic adjustment based on material thickness.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-75 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder's 2513N push force is insufficient but you want to avoid the heavier 160mm class. The generous 75mm adjustment range is perfect for applications requiring frequent end-position tuning during commissioning or when accommodating multiple product sizes on a single line. Unlike a fixed-stroke SAI cylinder, this model lets you set the exact retract distance mechanically.
For any installation, remember the rear adjuster functions strictly as a travel stop and the air cushion only manages deceleration; neither will hold a load without continuous live air. If your setup requires true load-holding without pneumatic pressure, you must integrate an external rod lock or select an AirTAC SAIL or BSAI series cylinder. To replace an ISO 15552 unit, match the 125mm bore, 175mm stroke, 75mm adjustment, PT port thread, and required mounting bracket.
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 SAIJ125X175-75 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the 175mm nominal stroke by up to 75mm, providing a usable travel window of 100-175mm. It only sets the end position and does not lock the load without live air pressure.
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