Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-75
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-75 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-75
The AirTAC SAIJ200X850-75 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications, delivering a robust 28274N push force at 0.9 MPa. It features an extruded aluminum barrel with sensor grooves on both sides, entirely avoiding tie-rod construction. Equipped with a SUS304 stainless steel rod and PT tapered ports, it provides exceptional corrosion resistance and secure pneumatic connections in demanding environments.
This model incorporates a rear mechanical adjuster that allows you to fine-tune the effective travel window from 775 to 850 mm without external stops. Operating at speeds of 30-500 mm/s, it utilizes adjustable air cushions at both ends to decelerate massive loads smoothly. The rear stopper functions purely as a travel end-point, not a lock, meaning live air pressure is required to hold the load securely.
Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-75 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-75 |
|---|---|
| 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 SAIJ200BX850-75
| 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 SAIJ200BX850-75 Is Used
Heavy Stamping Positioning
Dial in the exact bottom-dead-center of large metal stamping presses using the 775-850 mm travel window to account for die height variations.
Automotive Assembly Line
Adjust the end-stop on the fly during vehicle model changeovers, ensuring heavy robotic fixtures meet precise positioning tolerances without cylinder removal.
Large Machinery Setup
Fine-tune the retraction end-point during heavy machinery commissioning to perfectly align material feeders without adding bulky external mechanical stops.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-75 the Right Cylinder?
Choose this SAIJ200X850-75 when your application requires extreme thrust, such as heavy stamping or large press operations, and demands precise end-position tuning during commissioning. If you need to reduce the bore size to optimize air consumption, the neighboring 160 mm bore provides 18095N of push force at 0.9 MPa, which may suffice for lighter tooling. The integrated 75 mm adjustment range is ideal for accommodating product changeovers without physically swapping the cylinder.
Because the 850 mm stroke is substantial and generates high inertia, an external guide is strongly recommended to prevent side-loading damage to the rod and internal seals. For applications requiring true load-holding without continuous air pressure, this cylinder is insufficient; consider the AirTAC SAIL or BSAI series. To replace an ISO 15552 cylinder, match the 200 mm bore, 850 mm stroke, PT port threads, and SUS304 rod material. Note that SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ200BX850-75 FAQ
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective stroke by up to 75 mm. This creates a usable travel window of 775 to 850 mm, enabling fine-tuning of the end position without swapping the cylinder.
At an operating pressure of 0.9 MPa, this 200 mm bore cylinder generates a push force of 28274N and a pull force of 15080N. It can safely operate up to a maximum pressure of 1.0 MPa.
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Covers non-human-caused product damage.
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