Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-10 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 SAIJ125AX375-10
The AirTAC SAIJ125X375-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5 MPa. It features a 375mm nominal stroke that can be precisely dialed back by up to 10mm, creating a 365-375mm usable travel window for exact end-position tuning. This cylinder uses a PT tapered port thread and a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance.
Because the stroke extends to 375mm on a 32mm rod, an external guide is recommended to manage side loading and prevent premature wear. The rear adjuster functions strictly as a mechanical stop to fine-tune deceleration and end limits without swapping the cylinder. It does not hold the load without live air pressure; for locking requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-10 |
|---|---|
| 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 SAIJ125AX375-10
| 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 SAIJ125AX375-10 Is Used
Precision End-Stop Tuning
Dial in the exact 365-375mm end position during machine commissioning to perfect part seating or forming depths without physically swapping components.
Product Size Changeovers
Quickly adjust the rear stop by a few millimeters on automated lines when running slightly different product lengths or heights.
Heavy Forming Operations
Leverage the 6136N thrust at 0.5 MPa for pressing or heavy clamping tasks where a fixed stroke cylinder lacks the necessary setup flexibility.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-10 the Right Cylinder?
Choose this 125mm bore when the 80mm class (delivering 2513N at 0.5 MPa) is insufficient for heavy actuation, but the 160mm bore (10053N) would be physically oversized. The 10mm adjustable window is specifically valuable in machine setups requiring micro-adjustments during product changeovers, allowing you to shift the end-stop without adding external stops or replacing the cylinder.
When matching ISO 15552 replacements, verify the 375mm stroke, 10mm adjustment range, PT G1/2 port, and your mounting choice from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2 (note that FB, CA, CB, and CR mounts are omitted from this series). As no magnet is specified, position sensing via CMSE or DMSE switches is not supported on this specific configuration.
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 SAIJ125AX375-10 FAQ
It features a rear mechanical adjuster that lets you shorten the effective stroke by up to 10mm. This creates a usable travel window of 365-375mm, allowing you to fine-tune the retract end position during commissioning or product changeovers without changing the cylinder itself.
At 0.5 MPa, it provides 6136N of push force and 5734N of pull force. If higher pressure is utilized, the push force increases to 8590N at 0.7 MPa and 11045N at 0.9 MPa.
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