Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30 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 SAIJ125AX375-30
The AirTAC SAIJ125X375-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 375 mm travel that can be fine-tuned down by up to 30 mm, creating a usable 345-375 mm end-position window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning while remaining dimensionally interchangeable with ISO 15552 cylinders.
This unit is built with an SUS420J2 stainless steel rod for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE or DMSE switches if positioning feedback is required later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30 |
|---|---|
| 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 SAIJ125AX375-30
| 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 SAIJ125AX375-30 Is Used
Product Size Changeovers
Dial in the 30 mm adjustment during line format changes to accommodate varying package lengths without replacing hardware.
Heavy Press Positioning
Leverage the 6136 N push force to move heavy assemblies, using the rear stopper to precisely set the final retraction point.
Machine Commissioning
Fine-tune the end-of-stroke position during initial setup to avoid mechanical hard stops and perfect the timing sequence.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX375-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is physically oversized. The adjustable 345-375 mm window is perfect for commissioning fine-tunes or product-size changeovers without swapping the cylinder. Because the stroke exceeds 300 mm, external guide rails should support the load to prevent excessive side-loading on the rod.
When specifying a replacement, verify the 375 mm stroke, 30 mm adjuster, PT G1/2 port, and your mounting choice from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Note that the rear screw acts only as a travel stop and does not hold the load without live air; for positive locking, consider the SAIL or BSAI series.
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 SAIJ125AX375-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective travel from the nominal 375 mm down to 345 mm. It functions as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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Standard models usually ship in 3-4 days.
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