Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75
The AirTAC SAIJ200X125-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 50-125 mm, allowing you to dial back the 125 mm nominal stroke by up to 75 mm. This massive bore delivers 15708 N of push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This unit uses a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and features PT tapered port threads. It includes variable air cushions at both ends to decelerate high kinetic energy loads. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for dead-load holding, consider an external rod lock or the SAIL series.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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, 50 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SAIJ200 Adjustable Cylinder SAIJ200AX125-75 Is Used
Heavy Press Fine-Tuning
Dial in the exact 50 to 125 mm closure distance on heavy stamping or press equipment during setup without machining custom spacers.
Product Changeover
Quickly adapt end-of-stroke positions on a production line when switching between product variants by turning the rear adjuster screw.
Large Fixture Positioning
Securely position large welding or machining fixtures, relying on the 15708 N thrust force at 0.5 MPa to move heavy platens into their working window.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-75 the Right Cylinder?
Selecting this 200 mm bore over a 160 mm neighbor steps the 0.5 MPa push force up from 10053 N to 15708 N for heavier tooling. The 75 mm adjustment range is ideal for product changeovers, letting you fine-tune the end position at commissioning without adding external stops or swapping a fixed-stroke SAI cylinder. The 40 mm rod and M36x2 thread handle substantial side loads, but because the 125 mm stroke is relatively short for this bore, external guides are less critical than in longer strokes. To match this ISO 15552 replacement, specify bore 200, stroke 125, adjust 75, PT G3/4 ports, and the SUS420J2 rod. Since no magnet is specified, position sensing via CMSE or DMSE switches is not enabled.
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 SAIJ200 Adjustable Cylinder SAIJ200AX125-75 FAQ
At a 0.5 MPa operating pressure, this 200 mm bore cylinder provides 15708 N of push force and 15080 N of pull force. At the maximum 1.0 MPa pressure, it delivers 3204 kgf of push force.
The rear adjuster screw lets you shorten the effective travel from the 125 mm nominal stroke down to as little as 50 mm. This creates a 50-125 mm usable window for fine-tuning the retract end position without replacing the cylinder.
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