Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-20S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-20S
The AirTAC SAIJ200X70-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the retract end position. With a 70 mm nominal stroke and a 20 mm adjustment range, it provides a usable travel window of 50-70 mm to dial in exact end stops during commissioning. This 200 mm bore size generates 15708 N of push force at 0.5 MPa, making it suited for heavy-duty pressing and clamping tasks.
This specific configuration features an SUS420J2 stainless steel piston rod (option A) for improved corrosion resistance, a PT tapered port thread, and a built-in magnet for use with AirTAC CMSE reed and DMSE solid-state sensors. The extruded aluminum barrel includes sensor grooves on three sides, and the mounting options cover Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-20S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 70 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 SAIJ200AX70-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×70 | 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 SAIJ200AX70-20S Is Used
Press Fitment Tuning
Dial in the exact 50-70 mm travel distance during machine commissioning to achieve perfect press fits without machining custom spacers.
Product Changeover
Quickly adjust the retract end-stop position on a packaging line when switching to a different product size, minimizing downtime.
Heavy-Duty Clamping
Secure large workpieces with up to 15708 N of force at 0.5 MPa, using the adjustable stop to compensate for workpiece thickness variations.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-20S the Right Cylinder?
Choose this 200 mm bore cylinder when your application requires substantial thrust—up to 15708 N at just 0.5 MPa. If your force requirements are lower, stepping down to a 160 mm bore yields 10053 N, which may offer a more compact footprint. The adjustable stroke is ideal for product changeovers on a line where the exact end-of-travel position must shift by a few millimeters without swapping out the entire cylinder or adding external mechanical stops.
When specifying a replacement, match the 200 mm bore, 70 mm stroke, 20 mm adjustment range, PT G3/4 port, and the -S magnet requirement. Because the SAIJ features a 40 mm diameter rod and M36x2 thread, it handles high side loads well, though any application should still guide the load to prevent rod binding. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure. For true load-holding, consider the SAIL or BSAI series.
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 SAIJ200AX70-20S FAQ
The rear adjuster screw allows you to mechanically shorten the effective stroke by up to 20 mm. This means the 70 mm nominal stroke can be fine-tuned down to a 50 mm travel window to set precise end positions without adding external stops.
At a 0.5 MPa operating pressure, the SAIJ200X70-20-S provides 15708 N of push force and 15080 N of pull force. It can deliver up to 3204 kgf at its maximum 1.0 MPa pressure rating.
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