Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30
The AirTAC SAIJ125X180-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 150-180 mm usable travel window from its 180 mm nominal stroke. Delivering 6136 N of push force at 0.5 MPa, it handles heavy positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, though this configuration ships without a magnet.
This variant uses an SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position during commissioning. It does not lock the load without live air pressure, meaning load-holding requires an external rod lock or a related SAIL pneumatic lock cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125AX180-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125AX180-30 Is Used
Heavy Fixture Positioning
Dial in the exact retract distance within the 150-180 mm window during machine commissioning to align heavy machining fixtures precisely.
Product Size Changeover
Quickly adapt the end-stop for new product lengths on an assembly line by turning the rear adjuster instead of replacing the entire cylinder.
Material Pressing
Leverage the 6136 N push force at 0.5 MPa to press or hold components, using the adjustable stop to compensate for material thickness variations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks the thrust for moving heavy fixtures, but a 160 mm bore is physically too large. The 30 mm adjustment window is ideal for product changeovers, allowing you to dial in the exact end-stop without swapping the cylinder or adding external shims. Unlike a fixed-stroke SAI cylinder, this model absorbs mechanical variance during machine setup.
For an exact ISO 15552 replacement, match the 125 mm bore, 180 mm stroke, PT ports, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted. Because the 180 mm stroke is under the 300 mm threshold, side-load stress is moderate, but the robust 32 mm rod still requires an external guide for heavy lateral loads.
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 SAIJ125AX180-30 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. It can reach up to 11045 N push at 0.9 MPa.
The rear mechanical stopper allows you to trim the effective stroke by up to 30 mm, creating a 150 to 180 mm usable travel window. It functions as a travel stop and does not hold the load without continuous air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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