Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50
The AirTAC SAIJ125X230-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and incorporates a 50mm adjustment range, creating a precise 180-230mm usable travel window for dialing in end positions during commissioning.
This configuration uses a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and features PT tapered ports. The extruded aluminum barrel includes dual sensor grooves, and the mounting set spans Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB and CA brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125AX230-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125AX230-50 Is Used
Machine Setup Tuning
Dial in the exact end-of-stroke position during initial commissioning without fabricating custom spacer blocks.
Product Size Changeovers
Quickly adapt the retract distance on a packaging line when transitioning to different carton lengths.
Heavy Assembly Pressing
Leverage 6136N of thrust to seat heavy components while using the 50mm adjuster to control the final pressing depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N at 0.5 MPa) lacks the thrust for heavy moving assemblies, but stepping up to a 160mm bore is unnecessary. The 50mm rear adjuster allows operators to fine-tune the retract end on the fly, which is far more efficient than machining external dead-stops or swapping to a different fixed-stroke SAI cylinder during product changeovers.
Because the 230mm stroke exceeds the 300mm threshold requiring external guides, standard side-load rules apply. Note that the rear adjuster functions strictly as a travel stop and does not hold loads without live air; for true pneumatic locking, select the SAIL or BSAI series instead. To match this ISO 15552 footprint exactly, specify: 125mm bore, 230mm stroke, 50mm adjust, PT G1/2 ports, no magnet, and the relevant mounting bracket.
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 SAIJ125AX230-50 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster acts as an external stopper that can trim the effective travel back by up to 50mm. For this 230mm stroke model, it creates a usable travel window of 180-230mm, allowing you to set the exact end position without replacing the cylinder.
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