Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-75
The AirTAC SAIJ125X375-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 375 mm travel by up to 75 mm for a precise 300-375 mm usable window. It delivers substantial thrust, generating 6136 N of pull force at 0.5 MPa and reaching 11045 N at 0.9 MPa. The extruded aluminum barrel features sensor grooves on both sides, though this specific configuration omits the magnet.
This unit utilizes an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and pairs with PT tapered port threads. The rear adjuster functions strictly as a mechanical stop to fine-tune the retract position during commissioning; it does not lock the load without live air pressure. For position holding without continuous air, an external rod lock or related SAIL cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAIJ125AX375-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAIJ125AX375-75 Is Used
Product Size Changeovers
Quickly shift the end-stop within the 300-375 mm window during packaging line format changes without bolting on external stops.
High-Force Positioning
Leverage up to 11045 N of push force at 0.9 MPa to move heavy assemblies while fine-tuning the final retract position at commissioning.
Long-Stroke Assembly Presses
Use the 375 mm travel to reach across large fixtures, dialing back the stroke precisely by up to 75 mm to accommodate varying part heights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-75 the Right Cylinder?
Selecting this 125 mm bore makes sense when your application requires high force, as it yields 6136 N pull at 0.5 MPa. If your load demands less power, stepping down to an 80 mm bore provides 2268 N pull, whereas moving up to a 160 mm bore offers 9425 N pull. The 75 mm adjustment range is perfect for product changeovers on a line, letting you shift the end-stop without swapping the cylinder or adding external stops. Because the total stroke is 375 mm, ensure you use an external guide to support the rod and prevent excessive side-loading on the long travel.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 375 mm stroke, 75 mm adjustment, PT G3/8 port, and your required mounting style. The SAIJ series supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR options. As this SKU lacks the -S magnet, it cannot host CMSE reed or DMSE electronic sensors without changing the piston assembly.
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 SAIJ125AX375-75 FAQ
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 75 mm, creating a usable 300-375 mm window. It sets the end position but does not hold the load without live air pressure.
At 0.5 MPa it provides 6136 N pull and 8590 N push. At 0.9 MPa, the push force increases to 11045 N, with a maximum rated force of 1251 kgf at 1.0 MPa.
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