Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-30S
The AirTAC SAIJ125X220-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 190 to 220 mm, allowing you to dial in the exact retract position during commissioning without adding external stops. In this configuration, the 125 mm bore generates 6136 N of push force and 5734 N of pull force at a 0.5 MPa operating pressure.
This unit includes a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides, and the integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic switches for precise position detection. The variable air cushions at both ends work alongside the rear stopper screw to decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAIJ125AX220-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SAIJ125AX220-30S Is Used
Product Changeovers
Dial in the 190-220 mm travel window during format size shifts on automated equipment without physically swapping the cylinder.
Variable End Stops
Set precise retract positions for diverter arms or pushers where the exact end-of-stroke location must be tuned per batch.
Machine Setup
Fine-tune the final resting position during initial commissioning to perfect timing sequences without machining external stop blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX220-30S the Right Cylinder?
Select this 125 mm bore when an application requires substantial thrust—stepping down to a 100 mm bore reduces the 0.5 MPa push force to 3927 N, while moving up to a 160 mm bore increases it to 10053 N. The adjustable stroke is ideal for product changeovers on a packaging line, letting you fine-tune the end position quickly. The rear adjuster acts purely as a travel stop and does not hold the load without live air; for true pneumatic locking without pressure, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 220 mm nominal stroke, 30 mm adjustment range, PT G1/2 port, and the -S magnet requirement. Because the 220 mm stroke is relatively long, ensure adequate external guiding to prevent rod side-loading, and note that the SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
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 SAIJ125AX220-30S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw lets you shorten the effective travel from its 220 mm nominal stroke down to 190 mm. This creates a 30 mm tuning window for precise end-positioning at commissioning without changing the cylinder.
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