Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40
The AirTAC SAIJ125X100-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 60-100 mm usable travel window, allowing you to dial back the 100 mm nominal stroke by up to 40 mm during commissioning. Delivering 6136 N of pull force at 0.5 MPa, it handles heavy loads with precision.
This unit features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered ports. The rear adjuster acts strictly as a travel stop to fine-tune the end position without requiring an external stopper block. It is not a locking mechanism, so live air pressure is required to hold the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125AX100-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125AX100-40 Is Used
Precision End-Stop Tuning
Dial in the exact retraction point within the 60-100 mm travel window during machine commissioning without adding external stopper blocks.
Product Changeover Adjustment
Quickly adapt the cylinder's effective stroke on the line when changing product sizes, using the 40 mm rear adjustment range.
Heavy-Duty Positioning
Leverage the 6136 N pull force to move heavy fixtures, relying on the rear stop to set the final position accurately.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-40 the Right Cylinder?
Choose this 125 mm bore cylinder when your application requires 6136 N of pull force at 0.5 MPa and demands exact end-position tuning. If your force requirements are lower, stepping down to an 80 mm bore yields 2268 N of pull force, while stepping up to a 160 mm bore provides 9425 N. The adjustable stroke is ideal for machine setups requiring variable end stops without swapping cylinders.
For ISO 15552 replacement matching, specify a 125 mm bore, 100 mm stroke, 40 mm adjustment range, PT tapered ports, SUS420J2 rod material, and no magnet. Note that SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ125AX100-40 FAQ
The rear adjuster allows you to shorten the 100 mm nominal stroke by up to 40 mm, providing a usable travel window of 60 to 100 mm. It acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
At 0.5 MPa, it provides 6136 N of pull force and 1559 N of push force. At the maximum operating pressure of 1.0 MPa, the push force reaches 1251 kgf.
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Standard models usually ship in 3-4 days.
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