Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-40
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-40 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 SAIJ200AX70-40
The AirTAC SAIJ200X70-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 30-70 mm usable travel window from its 70 mm nominal stroke. Delivering 15708 N of push force at 0.5 MPa, this large-bore actuator handles heavy-duty positioning. It uses a SUS420J2 stainless steel piston rod for enhanced corrosion resistance and is equipped with PT tapered port threads.
The rear adjustment screw acts as a travel stop, allowing you to fine-tune the retract end-position at commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the standard variable air cushions at both ends decelerate the massive 40 mm cushion travel. This cylinder supports speeds of 30-500 mm/s.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-40 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-40 |
|---|---|
| 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 SAIJ200AX70-40
| 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 SAIJ200AX70-40 Is Used
Press Stroke Calibration
Dial in the exact 30-70 mm travel window during machine setup to accommodate varying material thicknesses without repositioning the heavy-duty press cylinder.
Product Changeover Stops
Rapidly adjust the retract end-position on a packaging line when switching to a different product size, utilizing the 40 mm adjustment range.
Heavy Load Positioning
Leverage the 15708 N push force at 0.5 MPa to shift heavy assemblies into test fixtures, relying on the fine-tuned end-stop for repeatable placement.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-40 the Right Cylinder?
Select this 200 mm bore model when an application requires substantial thrust, such as 21991 N at 0.7 MPa, combined with a short, highly adjustable stroke. If you need less force, stepping down to a 160 mm bore yields 10053 N at 0.5 MPa, whereas moving up is not possible as this is the largest standard SAIJ size. The 40 mm adjustment range is ideal for product changeovers on a line, letting you dial in the exact end-stop without swapping the cylinder.
Because the 70 mm stroke is short, side-load risks from an unsupported load are minimal, but the heavy 40 mm rod thread handles substantial offset stresses. To match this ISO 15552 cylinder for a replacement, verify the 200 mm bore, 70 mm stroke, 40 mm adjustment, PT G3/4 ports, and the lack of a magnet. Note that the rear adjuster is a stop, not a lock; for load-holding without live air pressure, use a SAIL or BSAI cylinder. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ200AX70-40 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 0.7 MPa, the push force increases to 21991 N.
The rear adjuster screw lets you mechanically shorten the 70 mm nominal stroke, creating a usable travel window of 30 to 70 mm. It functions as a physical stop to fine-tune the end position and does not lock the load without live air pressure.
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