Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-50S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-50S 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 SAIJ200AX850-50S
The AirTAC SAIJ200X850-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering massive thrust up to 15708N at 0.5 MPa. Its 850mm nominal stroke can be dialed back by up to 50mm, providing an exact 800-850mm usable travel window for fine-tuning heavy machinery end positions. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and PT tapered ports. Because the 850mm stroke is substantial, the robust 40mm rod diameter helps manage bending stress, though an external guide remains essential for unsupported loads. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-50S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-50S |
|---|---|
| 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 SAIJ200AX850-50S
| 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 SAIJ200AX850-50S Is Used
Heavy Press Tuning
Dial in the exact 800-850mm end position for large metal forming or stamping presses during setup, ensuring precise contact without mechanical spacers.
Oversized Payload Diversion
Adjust the stroke on the fly to accommodate varying lengths of heavy pallets or structural materials moving along a high-capacity transfer line.
Large Assembly Changeover
Quickly reconfigure the retraction point on heavy automotive or industrial machinery assembly stations when switching between different product variants.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-50S the Right Cylinder?
Select this 200mm bore cylinder when an application demands extreme force, stepping up significantly from a 160mm bore that provides 10053N push force at 0.5 MPa. The adjustable 800-850mm window is ideal for product changeovers, allowing you to reposition the end stop without physically swapping the cylinder or adding external spacers. For a fixed end position, a standard SAI cylinder suffices, but the SAIJ configuration saves commissioning time on variable product lines.
When replacing an ISO 15552 cylinder, match the 200mm bore, 850mm stroke, 50mm adjustment, PT ports, and the -S magnet. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Given the 850mm stroke, external load guiding is mandatory to prevent excessive side loading on the rod. To hold a load securely without continuous air pressure, integrate an external rod lock or specify a SAIL or BSAI cylinder instead of relying on the adjuster.
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 SAIJ200AX850-50S FAQ
At 0.5 MPa operating pressure, this 200mm bore cylinder generates a push force of 15708N and a pull force of 15080N. At the maximum 1.0 MPa pressure, it achieves a push force of 28274N.
The rear adjusting screw allows you to shorten the 850mm nominal stroke by up to 50mm, creating a usable travel window of 800-850mm. This stopper fine-tunes the end position but does not lock or hold the load without live air pressure.
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