Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20 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 SAIJ200AX850-20
The AirTAC SAIJ200X850-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering massive thrust with a 15708N push force at 0.5 MPa. It features a robust 40mm SUS420J2 stainless steel rod and PT tapered port threads. The integrated adjustment screw allows you to fine-tune the effective travel within an 830-850mm window, providing precise end-position calibration without swapping out the entire unit.
This model utilizes an extruded aluminum barrel with sensor grooves on both sides rather than a traditional tie-rod design. Operating at speeds of 30-500mm/s, it supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. The rear adjuster functions strictly as a travel stop for deceleration and positioning, not as a load-holding lock.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20 |
|---|---|
| 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 SAIJ200AX850-20
| 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 SAIJ200AX850-20 Is Used
Heavy Press Tuning
Dial in the exact 830-850mm end position during heavy press commissioning to accommodate material thickness variations without adding external stops.
Product Line Changeover
Quickly adjust the stroke length by up to 20mm when switching between different product sizes on a high-force assembly line.
Long-Stroke Positioning
Achieve precise final positioning on long-stroke machinery where a fixed 850mm stop cannot account for mechanical tolerances.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-20 the Right Cylinder?
Selecting this 200mm bore cylinder is ideal when an application demands extreme force, such as 15708N push at 0.5 MPa, alongside a variable end-stop. If you need to step the bore down for a lighter load, a 160mm bore provides 10053N of push force. Choose the SAIJ adjustable configuration over a fixed SAI when you need on-the-fly commissioning tweaks or product changeover flexibility. To replace this cylinder, match the 200mm bore, 850mm stroke, 20mm adjustment, PT port threads, SUS420J2 rod, and the specific mounting style.
Because this cylinder features an 850mm stroke, the extended 40mm rod requires external guiding to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster and air cushions only manage the travel end; they cannot hold a load without live air pressure. For true load-holding without continuous air, consider an AirTAC SAIL or BSAI cylinder, or install an external rod lock.
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 SAIJ200AX850-20 FAQ
At 0.5 MPa operating pressure, this 200mm bore cylinder provides a push force of 15708N and a pull force of 15080N. At the maximum 1.0 MPa pressure, it delivers up to 3204 kgf.
The rear adjusting screw acts as a stopper that lets you shorten the effective travel from the nominal 850mm down to 830mm. This creates an 830-850mm adjustable window, allowing you to fine-tune the retract end position at commissioning without changing the cylinder.
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