Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-75S
The AirTAC SAIJ125X170-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 95 to 170 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads while allowing precise end-position tuning during commissioning without swapping out the entire unit.
This variant includes a magnetic piston (-S) for position sensing and uses a PT tapered port thread. The extruded aluminum barrel features sensor grooves on both sides, seamlessly accepting AirTAC CMSE reed and DMSE electronic solid-state switches. You can fine-tune the retract stop via the rear screw, though this mechanism acts strictly as a travel limiter and not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125X170-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125X170-75S Is Used
Variable End Stops
Dial in the retract position anywhere between 95 and 170 mm to accommodate different material lengths or tooling depths without mechanical redesign.
Machine Changeover
Rapidly reconfigure production lines for new product sizes by turning the rear adjuster, avoiding the downtime of physically replacing cylinders.
Heavy Clamping Setup
Leverage the 6136 N push force for robust clamping tasks while fine-tuning the exact clamping depth during initial machine commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-75S the Right Cylinder?
Select this 125 mm bore when an application requires substantial thrust, stepping up from a 100 mm bore that provides 3927 N at 0.5 MPa. The 75 mm adjustment range is exceptionally wide, making it perfect for product-size changeovers on a line where the end-stop needs frequent reconfiguration. If your process demands load holding without live air pressure, a plain SAIJ will not suffice; you should consider an external rod lock or explore the SAIL or BSAI series.
To match this exact ISO 15552 replacement, specify a 125 mm bore, 170 mm nominal stroke, 75 mm adjustment range, PT port thread, and the -S magnet option. Mounting choices are restricted to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets. Because the stroke is 170 mm, side-load is minimal, but always ensure proper alignment to protect the 32 mm carbon steel rod.
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 SAIJ125X170-75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm, creating a usable travel window of 95 to 170 mm. It acts as a mechanical stop for end-position tuning and does not lock the load without live air.
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