Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40S 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 SAIJ200AX125-40S
The AirTAC SAIJ200X125-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 125 mm travel by up to 40 mm. This creates a precise 85-125 mm usable window for fine-tuning end positions at commissioning without swapping out the unit. Delivering 15708 N of push force at 0.5 MPa, it is built for heavy-duty tasks.
This variant features a SUS420J2 stainless steel rod for enhanced corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. It uses PT tapered port threads and reaches speeds of 30-500 mm/s. The rear screw acts purely as a travel stop to decelerate the load, meaning it will not hold position without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40S |
|---|---|
| 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 SAIJ200AX125-40S
| 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 SAIJ200AX125-40S Is Used
Heavy-Duty Press Tuning
Dial in the exact 85-125 mm end-stop during press setup to accommodate varying material thicknesses without re-engineering the fixture.
Product Changeover Stops
Adjust the rear travel stopper rapidly when switching the manufacturing line to a different pallet or product size.
Automated Assembly Clamping
Leverage the 15708 N push force to secure large workpieces while fine-tuning the clamping depth via the rear adjuster.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-40S the Right Cylinder?
Selecting this 200 mm bore cylinder makes sense when your application requires the massive 15708 N thrust at 0.5 MPa and on-the-fly end-position tuning; stepping down to a 160 mm bore drops the output to 10053 N. An adjustable stroke is chosen over a fixed SAI model to accommodate product-size changeovers without adding external stops. For load-holding without live air, this cylinder is not a lock—consider the SAIL or BSAI series instead.
To match this exact configuration for an ISO 15552 replacement, specify the 200x125 dimensions, 40 mm adjustment, PT port threads, SUS420J2 rod material, and the -S magnet. Because the 125 mm stroke is below the 300 mm threshold, external side-load guides are less critical here, though the robust 40 mm rod and M36x2 thread handle substantial mechanical stress.
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 SAIJ200AX125-40S FAQ
At a 0.5 MPa operating pressure, this 200 mm bore cylinder generates 15708 N of push force and 15080 N of pull force. It can reach a maximum push force of 28274 N at 1.0 MPa.
The rear adjuster screw trims the effective travel back by up to 40 mm from the nominal 125 mm stroke, providing an 85-125 mm usable window. It functions as a mechanical stop to set the end position and does not lock or hold the load without continuous air pressure.
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