Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-100
The AirTAC SAIJ125X350-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 250 to 350 mm without swapping hardware. It delivers robust thrust, providing 6136 N push and 5734 N pull forces at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and this specific configuration uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance.
Equipped with PT tapered port threads (G1/2) and a 32 mm rod diameter, this model is built for heavy loads. The rear adjuster acts purely as a mechanical stop to set the retract end position, meaning it cannot hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125AX350-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125AX350-100 Is Used
Variable Product Changeovers
Dial in the retract position by up to 100 mm when switching between different pallet sizes on a single assembly line, eliminating the need for physical spacer adjustments.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to seat heavy components accurately, using the fine-tune stopper to perfect the end position during initial machine commissioning.
Long-Stroke Guiding
Utilize the 250-350 mm travel window for extended reach operations, ensuring external guides are used to support the 32 mm rod and prevent binding over the long stroke.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-100 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore is insufficient, as the smaller size yields only 2513 N push at 0.5 MPa. The 100 mm adjustment range on this 350 mm stroke is ideal for production lines running multiple product sizes, allowing operators to dial in the exact retract end-stop during changeovers rather than installing external stops or buying a fixed-stroke SAI cylinder. When integrating this ISO 15552 interchangeable cylinder, match your bore, stroke, PT ports, and mounting hardware.
Because the 350 mm stroke is substantial, the 32 mm rod and M27x2 rod thread still require an external guide to prevent excessive side-loading on the piston. This SAIJ model supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR options. It operates at speeds of 30-500 mm/s.
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 SAIJ125AX350-100 FAQ
At 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 mechanical screw allows you to shorten the effective travel from its nominal 350 mm down to as little as 250 mm. This creates a 250-350 mm adjustable window, but note the adjuster is a stop, not a lock, and cannot hold the load without continuous air pressure.
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