Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-100 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 SAIJ125X175-100
The AirTAC SAIJ125X175-100 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136 N push force at 0.5 MPa and features a PT tapered G1/2 port. By turning the rear adjusting screw, you can trim the nominal 175 mm stroke back by up to 100 mm, creating a precise 75-175 mm usable travel window for fine-tuning end positions at commissioning.
This adjustable stopper lets you adapt machine travel for new product sizes without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the standard carbon steel rod mates with an M27x2 thread. The rear adjuster acts purely as a travel stop to set deceleration alongside the variable air cushions; it does not hold the load without live air.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-100 |
|---|---|
| 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 SAIJ125X175-100
| 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 SAIJ125X175-100 Is Used
Product Size Changeovers
Quickly reconfigure the 75-175 mm travel window on packaging lines when switching to different container sizes, avoiding the need to physically swap out cylinders.
Machine Setup Calibration
Dial in the exact retract end-position during commissioning using the rear stopper, ensuring high-precision forming operations without adding external mechanical stops.
Variable End-Stop Actuation
Handle heavy workpiece routing tasks requiring 6136 N of push force, relying on the rear screw to safely limit the travel distance for varying material lengths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-100 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires high thrust combined with variable end-stop positioning. If your setup needs less force, stepping down to a 100 mm bore yields 3927 N push at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. Choose the SAIJ adjustable-stroke format over a fixed SAI cylinder when you anticipate frequent product-size changeovers or need to dial in a precise retract position on the fly.
Because this model features a 175 mm stroke, the M27x2 rod and robust bore size handle standard loads well, but any long unsupported travel still requires an external guide to prevent side-loading damage. For load-holding without live air pressure, a plain SAIJ is insufficient—consider the SAIL air-released lock, BSAI clamp-lock, or an external rod lock. To match this ISO 15552 interchangeable cylinder, specify bore 125, stroke 175, adjustment 100, PT port, and your preferred mounting from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
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 SAIJ125X175-100 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If operated at 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the nominal 175 mm stroke by up to 100 mm, creating a usable travel window of 75-175 mm. This stopper sets the end position and works with the air cushion for deceleration, but it does not lock the load without continuous air pressure.
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