Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-30
The AirTAC SAIJ125X165-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 135 to 165 mm, allowing you to dial back the nominal 165 mm stroke by up to 30 mm during commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning with precision.
This model uses a robust 32 mm carbon steel rod with an M27x2 thread, paired with PT tapered port threads (G1/2) for secure pneumatic connections. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without adding external stops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125X165-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125X165-30 Is Used
Variable End Stops
Dial in the exact 135 to 165 mm retract position during machine setup to accommodate changing material thicknesses without replacing hardware.
Product Changeover
Quickly adjust the stroke window on packaging lines when product dimensions change, using the 30 mm trim to prevent costly mechanical modifications.
Heavy Assembly Press
Leverage the 6136 N push force at 0.5 MPa to seat heavy components, using the rear stopper to fine-tune the final pressing depth accurately.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-30 the Right Cylinder?
Choose this 125 mm bore when 80 mm falls short (2513 N at 0.5 MPa) but you want to avoid stepping up to the massive 160 mm frame (10053 N at 0.5 MPa). The 30 mm adjustment range is ideal for product changeovers on a line, letting operators fine-tune the retract end position without physically swapping the cylinder. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Because the 165 mm stroke is under 300 mm, side-load risks are lower than extended versions, though long unsupported loads still need an external guide. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ does not hold position without live air. For fail-safe load holding, consider the SAIL or BSAI series. This cylinder is dimensionally interchangeable per ISO 15552.
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 SAIJ125X165-30 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. The maximum operating pressure is 1.0 MPa.
The rear adjuster screw lets you shorten the effective travel from 165 mm down to 135 mm, creating a 30 mm adjustable window. It functions as a mechanical stop to fine-tune end positions and is not a lock.
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