Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-75
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-75 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 SAIJ200AX850-75
The AirTAC SAIJ200X850-75 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications, delivering a massive 28274N of push force at 0.9 MPa. It features a rear mechanical stopper that allows you to fine-tune the effective travel down from the 850 mm nominal stroke, creating a precise 775-850 mm usable window. This on-machine adjustability eliminates the need to physically swap cylinders during product changeovers or end-position commissioning.
Built with a 40 mm carbon steel core upgraded to a SUS420J2 stainless steel rod (material code A), this 200 mm bore unit resists corrosion in humid environments. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. PT tapered ports (G3/4) handle the high airflow required to move the 40 mm rod at operating speeds of 30-500 mm/s.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-75 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-75 |
|---|---|
| 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 SAIJ200AX850-75
| 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 SAIJ200AX850-75 Is Used
Heavy Press Tuning
Dial in the exact 775-850mm end-stop during heavy press commissioning to accommodate varying material thicknesses without changing the cylinder.
Automated Assembly Line
Adjust the retract position on the fly during production line changeovers to handle different pallet sizes while leveraging 15708N of thrust at 0.5 MPa.
Large Fixture Positioning
Fine-tune the stroke end-point on large robotic fixtures to compensate for mechanical wear over time, using the 75mm rear adjustment screw.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-75 the Right Cylinder?
Selecting this 200 mm bore over a neighboring 160 mm bore significantly boosts your output, stepping up the 0.5 MPa push thrust from 10053N to 15708N. You would choose the SAIJ adjustable-stroke variant over a fixed SAI model when a machine setup requires dialing in the retract end-position within that 775-850 mm window without fabricating external dead-stops. Because the 850 mm stroke is substantial and the 40 mm rod is heavily loaded, an external guide is strongly recommended to prevent side-load damage.
When ordering, specify the 200 mm bore, 850 mm stroke, 75 mm adjustment range, PT tapered ports, and the SUS420J2 stainless rod (A). Mounting options are restricted to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that the rear adjuster acts only as a travel stop; it cannot hold a load without live air pressure. For true fail-safe holding, consider the SAIL or BSAI series instead.
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 SAIJ200AX850-75 FAQ
At 0.9 MPa, the push force is 28274N and the pull force is 15080N. At 0.5 MPa, it delivers a push force of 15708N and a pull force of 15080N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 850mm nominal stroke by up to 75mm, providing a usable travel window of 775-850mm. It is a travel stop, not a lock, so it will not hold the load without continuous air pressure.
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