Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20S
The AirTAC SAIJ200X850-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 830 to 850 mm. Built with an SUS420J2 stainless steel rod (code A) and a PT tapered port, it delivers massive thrust, pushing 15708 N and pulling 15080 N at 0.5 MPa. The integrated magnet (-S) supports precise position detection.
Because the stroke exceeds 800 mm, the 40 mm rod diameter and M36x2 thread provide necessary rigidity, though an external guide is recommended to manage side loads. The rear screw acts purely as a travel stop for fine-tuning end positions during commissioning, not as a load-holding lock.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 850 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 SAIJ200AX850-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×850 | 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 SAIJ200AX850-20S Is Used
Heavy Press Tuning
Fine-tune the 830-850 mm end-stop position during setup to precisely control high-force pressing operations without mechanical modifications.
Large Product Changeover
Adjust the rear stopper by up to 20 mm to accommodate different oversized product lengths on the line quickly and efficiently.
Heavy Load Positioning
Leverage 15708 N of push force at 0.5 MPa to move massive assemblies, using the rear adjuster to set the exact retraction limit.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20S the Right Cylinder?
Select this 200 mm bore cylinder when an application requires extreme force that a 160 mm bore cannot provide; stepping down to 160 mm yields 10053 N push at 0.5 MPa. The 20 mm adjustment range allows operators to dial in the exact end-of-stroke position without adding external stops or swapping the cylinder during product changeovers. For load-holding without live air pressure, a plain SAIJ is insufficient; consider an AirTAC SAIL or BSAI locking cylinder instead.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 850 mm stroke, 20 mm adjustment, PT G3/4 port, and the -S magnet requirement. The SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR options. Operating speed for this large bore is 30-500 mm/s.
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 SAIJ200AX850-20S FAQ
At 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 achieves a maximum push force of 3204 kgf.
The rear adjuster screw allows you to shorten the nominal 850 mm stroke by up to 20 mm, creating a usable travel window of 830 to 850 mm. This stopper fine-tunes the end position but does not lock or hold the load without continuous air pressure.
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