Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20S 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 SAIJ125AX80-20S
The AirTAC SAIJ125X80-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 80 mm stroke and a 20 mm adjustment range, it provides a usable travel window of 60-80 mm. This allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops. The 125 mm bore delivers 6136 N pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and carries the -S magnet option for position sensing. It is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors fitted into the dual-side extruded aluminum barrel grooves. The SAIJ mounting set omits FB, CA, CB, and CR brackets, utilizing a reduced subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20S |
|---|---|
| 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 SAIJ125AX80-20S
| 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 SAIJ125AX80-20S Is Used
Variable End-Stop Positioning
Dial in the exact 60-80 mm end-stop during machine setup to accommodate varying product dimensions without changing hardware.
Heavy-Duty Changeover
Rely on 6136 N pull force at 0.5 MPa to move heavy pallets or fixtures while fine-tuning the retract position on the fly.
Sensor-Ready Assembly Press
Use the -S magnet with DMSE solid-state sensors to confirm retraction within the adjustable window during critical pressing tasks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-20S the Right Cylinder?
Select this 125 mm bore adjustable cylinder when a machine changeover requires variable end-stops within a 60-80 mm travel window, delivering up to 6136 N pull force at 0.5 MPa. If your application needs less force, stepping down to an 80 mm bore yields 2268 N pull at 0.5 MPa. Conversely, a 160 mm bore provides 9425 N pull for heavier loads. The rear adjuster screw acts strictly as a travel stop and does not hold the load without live air; for fail-safe load holding, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 80 mm nominal stroke, 20 mm adjustment, PT tapered port threads, and the -S magnet. The 32 mm rod diameter and M27x2 rod thread provide high rigidity and excellent side-load capacity. Operating speed is 30-500 mm/s.
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 SAIJ125AX80-20S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 20 mm, creating a 60-80 mm usable travel window. It acts as a mechanical stop to fine-tune the retract position and is not a lock.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. The maximum operating pressure is 1.0 MPa.
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