Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75S 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 SAIJ125X165-75S
The AirTAC SAIJ125X165-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its defining feature is a 75mm adjustment range that creates a 90-165mm usable travel window, allowing precise end-position tuning without swapping the cylinder. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet interfaces directly with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model features a robust 32mm carbon steel rod and M27x2 rod thread, paired with 40mm variable air cushions at both ends to manage kinetic energy. Operating at speeds of 30-500mm/s, it utilizes a PT tapered port thread. The rear adjuster functions strictly as a mechanical stop to dial in the retract position, not as a locking device.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75S |
|---|---|
| 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 SAIJ125X165-75S
| 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 SAIJ125X165-75S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance within the 90-165mm window during machine commissioning to accommodate different material thicknesses without changing hardware.
Product Size Changeover
Quickly adjust the stroke end-position on packaging lines handling multiple carton sizes, using the rear stopper screw to switch formats rapidly.
High-Force Clamping Setup
Leverage the 6136N push force for heavy-duty clamping tasks while fine-tuning the clamping depth precisely to prevent workpiece deformation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-75S the Right Cylinder?
Choose this 125mm bore when an application requires higher thrust than a 100mm cylinder (which provides 3927N push at 0.5 MPa) but does not need the full 10053N output of a 160mm unit. The adjustable 90-165mm travel window is ideal for machines processing multiple product sizes, enabling operators to changeover end-stops via the rear screw rather than physically replacing fixed-stroke SAI cylinders or adding bulky external stops.
For ISO 15552 replacement matching, verify the 125mm bore, 165mm stroke, 75mm adjustment range, PT port thread, and -S magnet requirement. Because the nominal stroke is 165mm, side-load risks are moderate, but always ensure external guiding for heavy loads. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If the machine requires true load-holding without live air pressure, this cylinder is insufficient; specify an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ125X165-75S 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 delivers up to 1251 kgf of push force.
The rear adjuster screw allows you to mechanically shorten the effective stroke by up to 75mm from the nominal 165mm, providing a usable travel window of 90-165mm. This stopper sets the end position but does not lock the load without continuous air pressure.
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