Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-20
The AirTAC SAIJ125X80-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 60 to 80 mm, letting you fine-tune the retract end position by up to 20 mm during commissioning. In this bore size, it delivers a pull force of 5734 N at 0.5 MPa and a maximum push force of 6136 N at 1.0 MPa.
This model uses a PT tapered G1/2 port and a 32 mm carbon steel rod with an M27x2 thread. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches. Its mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125X80-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125X80-20 Is Used
Variable End Stops
Dial in the exact retract position within a 60 to 80 mm window to accommodate product size changes on a packaging line without adding external stops.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to align heavy clamping fixtures, relying on the 6136 N push force at 1.0 MPa.
Changeover Adjustment
Quickly reconfigure the effective stroke by up to 20 mm during product changeovers on automated assembly machinery.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-20 the Right Cylinder?
Choose this 125 mm bore if your application requires high thrust, specifically around 5734 N of pull force at 0.5 MPa. If your force requirements are lower, stepping down to an 80 mm bore yields 2268 N of pull force at 0.5 MPa. The adjustable stroke is ideal for machine setups requiring variable end stops without swapping cylinders, unlike a fixed-stroke SAI. Note that the rear adjuster is a travel stop, not a lock; the cylinder will not hold a load without live air. For load-holding, consider the SAIL or BSAI series. This unit is dimensionally interchangeable per ISO 15552, featuring a PT port, no magnet, and a 20 mm adjustment range.
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 SAIJ125X80-20 FAQ
The rear adjuster screw lets you shorten the nominal 80 mm stroke by up to 20 mm, providing an adjustable travel window of 60 to 80 mm. The adjuster acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
At 0.5 MPa, it provides a push force of 6136 N and a pull force of 5734 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 1251 kgf.
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Standard models usually ship in 3-4 days.
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