Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-100S 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 SAIJ125AX375-100S
The AirTAC SAIJ125X375-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 275 to 375 mm. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning tasks. The piston rod utilizes SUS420J2 stainless steel (option A) for enhanced corrosion resistance, and the integrated magnet supports position sensing.
This adjustable-stroke design allows operators to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. The rear adjuster acts purely as a travel stop, not a lock, so live air is required to hold the load. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-100S |
|---|---|
| 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 SAIJ125AX375-100S
| 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 SAIJ125AX375-100S Is Used
Heavy-Duty Press Tuning
Dial in the exact 275 to 375 mm retract position during machine setup to accommodate varying material thicknesses without external spacers.
Product Changeover Stops
Adjust the end-stop on the fly for different package sizes on a packaging line, utilizing the 100 mm trim range for rapid format changes.
Variable Position Diverter
Set precise sorting positions for heavy items on a conveyor, leveraging the 6136 N push force and fine rear screw adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-100S the Right Cylinder?
Choose this 125 mm bore when 100 mm (5497 N push at 0.5 MPa) is insufficient, or step down if 80 mm (2513 N) provides enough force. The 100 mm adjustment range is ideal for product changeovers requiring variable end stops. For load-holding without live air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead, as the SAIJ adjuster is only a stop. To replace an ISO 15552 cylinder, match the 125 mm bore, 375 mm stroke, PT tapered port, mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2), and the -S magnet requirement.
With a 375 mm stroke, the M27x2 rod and 32 mm diameter offer robust support, but long unsupported strokes still require an external guide to prevent side-loading damage. The operating speed is 30-500 mm/s for this bore size.
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 SAIJ125AX375-100S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
A rear screw stopper trims the effective stroke, creating a 275 to 375 mm adjustable travel window. It sets the end position but does not lock the load without live air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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