Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-40 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 SAIJ125AX180-40
The AirTAC SAIJ125X180-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and provides a usable travel window of 140 to 180mm, allowing you to dial back the stroke by up to 40mm during commissioning. The PT tapered ports and M27x2 rod thread are engineered to handle substantial side loads, though long unsupported strokes still require an external guide.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance. It utilizes a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The rear adjuster acts strictly as a travel stop for end-position tuning, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-40 |
|---|---|
| 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 SAIJ125AX180-40
| 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 SAIJ125AX180-40 Is Used
Machine Setup Changeover
Fine-tune the 140-180mm travel window during product size changeovers to reposition stops without replacing the entire cylinder.
Variable End-Stop Positioning
Dial in the exact end-of-stroke position during machine commissioning to compensate for mechanical tolerances in the fixture.
Heavy Payload Transfer
Utilize the 6136N thrust at 0.5 MPa to push heavy pallets, using the rear screw to tweak the final ejection distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-40 the Right Cylinder?
Select this 125mm bore cylinder when your application requires heavy thrust beyond the 3927N push force of a 100mm bore, but without stepping up to the 10053N of a 160mm unit. The adjustable stroke is perfect for machine setups requiring variable end stops or product-size changeovers without swapping the entire cylinder for a fixed-stroke SAI model. To replace an ISO 15552 cylinder, match the 125mm bore, 180mm nominal stroke, 40mm adjustment, PT G1/2 port, and mounting style.
Because the rear adjuster and air cushions only decelerate the travel end, this cylinder will not hold a load without live air. For positive holding without pressure, consider the SAIL lock or BSAI clamp-lock series. Since the 180mm stroke is under 300mm, side-load concerns are minimal, but external guidance is recommended for heavy 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 SAIJ125AX180-40 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa, it delivers up to 1251 kgf.
The rear adjuster allows you to shorten the effective travel from the 180mm nominal stroke down to 140mm. It acts as a mechanical stop to fine-tune the retract position, but it is not a lock and will not hold the load without continuous air pressure.
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