Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-75S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 425mm 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
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-75S
The AirTAC SAIJ200X425-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 350-425 mm usable travel window, letting you dial back the nominal 425 mm stroke by up to 75 mm during commissioning. Built with a SUS420J2 stainless steel rod and a magnet for position sensing, it delivers massive thrust up to 28274 N at 0.9 MPa. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic switches.
This model uses a G3/4 port and M36x2 rod thread. The substantial rod diameter handles high side loads, though the 425 mm stroke length still requires an external guide to prevent rod bending. The rear adjuster acts purely as a travel stop for fine-tuning end positions; it does not lock the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-75S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 425 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 SAIJ200AX425-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×425 | 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 SAIJ200AX425-75S Is Used
Heavy Press Tuning
Fine-tune the 350-425 mm end-stop on heavy metal forming presses to accommodate varying material thicknesses without changing hardware.
Pallet Positioning
Adjust the retract position on large conveyor systems during product size changeovers, ensuring precise stops for different pallet widths.
Machine Setup
Dial in the exact end-of-stroke during initial machine commissioning to prevent crashes, using the 75 mm rear adjustment window.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX425-75S the Right Cylinder?
Choose this 200 mm bore when your application requires extreme force, generating 21991 N of push at 0.7 MPa. If your force requirements are lower, stepping down to a 160 mm bore yields 14074 N at 0.7 MPa, which may save space and air consumption. An adjustable stroke is selected over a fixed SAI cylinder when machinery requires variable end-stops for product changeovers without physically swapping cylinders.
For ISO 15552 replacement matching, specify a 200 mm bore, 425 mm stroke, 75 mm adjustment, PT tapered ports, and a magnet (-S). The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the 425 mm stroke exceeds 300 mm, an external guide rail is highly recommended to manage side loads. For true load-holding without live air, select a SAIL or BSAI cylinder instead of relying on the adjuster stop.
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 SAIJ200AX425-75S FAQ
At an operating pressure of 0.9 MPa, this 200 mm bore cylinder provides a push force of 28274 N and a pull force of 15080 N. At 0.5 MPa, it delivers 15708 N of push force.
The rear adjuster allows you to shorten the effective travel from 425 mm down to 350 mm. It functions as a mechanical stop for end-position tuning and is not a lock; it cannot hold the load without continuous air pressure.
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