Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20 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 SAIJ125AX80-20
The AirTAC SAIJ125X80-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 60-80 mm usable travel window, allowing you to dial back the nominal 80 mm stroke by up to 20 mm during commissioning. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty positioning tasks.
This variant uses a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU lacks the internal magnet required for CMSE or DMSE electronic switches. Mounting options span Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20 |
|---|---|
| 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 SAIJ125AX80-20
| 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 SAIJ125AX80-20 Is Used
Variable End Stops
Fine-tune the retraction end position within a 60-80 mm window to accommodate varying material thicknesses without changing cylinder mounting.
Machine Changeover
Rapidly adjust the stroke stopper during product size changeovers on heavy machinery, utilizing the 6136 N force output to handle substantial payloads.
Heavy-Duty Clamping
Secure large workpieces with precise clamping depth adjustments, leveraging the SUS420J2 stainless steel rod for resistance against harsh environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20 the Right Cylinder?
Choose this 125 mm bore when 80 mm of travel is needed but exact end-positioning varies by product batch; the rear stopper replaces the need to bolt on external physical stops. If your application requires less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N.
Because the 80 mm stroke is relatively short for this large bore, side-load stress on the M27x2 rod thread is minimal, but an external guide is still recommended for heavy loads. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true pneumatic locking, consider the SAIL or BSAI series. To match this ISO 15552 replacement exactly, specify the 125 mm bore, 80 mm stroke, 20 mm adjustment, PT tapered port, and no magnet.
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 SAIJ125AX80-20 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 11045 N of push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, creating a 60-80 mm usable travel window. This stopper sets the end position but does not lock the load without continuous air pressure.
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