Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-30
The AirTAC SAIJ125X115-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 115 mm nominal stroke by up to 30 mm. This creates a precise 85-115 mm usable travel window, perfect for fine-tuning end positions during commissioning without swapping hardware. It features a SUS420J2 stainless steel rod (code A) for heightened corrosion resistance and pairs with PT tapered port threads.
Delivering 6136 N of pull force at 0.5 MPa and 8590 N at 0.7 MPa, this bore size handles heavy loads with ease. The rear adjuster acts purely as a travel stop to set deceleration endpoints, not as a load-holding lock; for true position retention without live air, consider the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125AX115-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125AX115-30 Is Used
Product Changeover
Quickly adapt the 85-115 mm stroke window to accommodate slightly different part lengths on the same production line without changing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to ensure perfect alignment of heavy 125 mm bore tooling.
Heavy Assembly Pressing
Leverage 8590 N of push force at 0.7 MPa for securely seating large components, using the rear screw to prevent over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-30 the Right Cylinder?
Selecting this 125 mm bore over the smaller 100 mm variant steps the thrust up significantly from 3681 N to 5734 N pull at 0.5 MPa, while jumping to the 160 mm bore offers 9425 N. The adjustable 85-115 mm window is ideal for product-size changeovers on a line, removing the need to bolt on external stops. When matching ISO 15552 replacements, verify the 115 mm stroke, 30 mm adjustment, G1/2 port, PT thread type, and the SUS420J2 rod material.
Since the nominal stroke is 115 mm, an external guide is not strictly required for side-load management, but the robust 32 mm rod and M27x2 thread provide excellent structural rigidity for heavy tooling. Remember that this cylinder operates at 30-500 mm/s and lacks a magnet for sensors.
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 SAIJ125AX115-30 FAQ
It features a rear adjusting screw that lets you shorten the 115 mm nominal stroke by up to 30 mm, providing a usable travel window of 85-115 mm. The adjuster acts as a mechanical stop to set the retract end position, but it does not lock the load without live air pressure.
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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