Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-20 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
- 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 SAIJ200BX850-20
The AirTAC SAIJ200X850-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits an effective travel window of 830 to 850 mm. Built with a robust 40 mm piston rod and SUS304 stainless steel construction, it generates 15708 N of push force and 15080 N of pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE electronic switches.
This heavy-duty pneumatic actuator uses PT G3/4 tapered ports and achieves a maximum standard stroke of 1500 mm. Operating at speeds of 30-500 mm/s, it provides variable air cushioning at both ends to decelerate massive 3204 kgf peak loads. The rear adjustment screw acts purely as a mechanical stop to fine-tune the retract position and is not a locking mechanism.
Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-20 |
|---|---|
| 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 SAIJ200BX850-20
| 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 SAIJ200BX850-20 Is Used
Heavy Press Tonnage Tuning
Dial in the exact bottom-end position of a massive stamping or forming press within the 830-850 mm window to accommodate varying material thicknesses without changing the cylinder.
Large Product Diversion
Adjust the retract stopper on the fly when switching a conveyor line between oversized pallets or heavy steel profiles, ensuring precise physical clearance during changeovers.
Automated Assembly Setup
Fine-tune the end-of-stroke position of a heavy-duty assembly actuator during initial machine commissioning, locking in the exact 830 mm minimum travel distance required for a new fixture.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-20 the Right Cylinder?
Selecting this 200 mm bore actuator over a smaller neighbor like the 160 mm bore (which provides 10053 N push at 0.5 MPa) is necessary when your application requires moving extreme masses that exceed 15 kN. The integrated 20 mm stroke adjuster is chosen over a fixed-stroke SAI cylinder when you need precise end-position tuning during commissioning or frequent product-size changeovers without physically swapping the actuator. Because the 850 mm stroke is substantial, the 40 mm rod requires an external guide to prevent excessive side-loading and premature seal wear.
For a direct ISO 15552 replacement match, ensure your specifications align to a 200 mm bore, 850 mm nominal stroke, 20 mm adjustment range, PT G3/4 port thread, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Note that the SAIJ series omits the FB, CA, CB, and CR mounts. If your process demands holding the load safely without live air pressure, this cylinder is insufficient; you must specify an external rod lock, a pilot-operated check valve, or select an AirTAC SAIL or BSAI clamp-lock cylinder 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 SAIJ200BX850-20 FAQ
At 0.5 MPa operating pressure, this 200 mm bore cylinder provides 15708 N of push force and 15080 N of pull force. It can achieve a maximum thrust of 3204 kgf at 1.0 MPa.
The rear adjusting screw acts as an external mechanical stop that allows you to shorten the effective travel from the 850 mm nominal stroke down to 830 mm. This stopper only sets the travel end and does not lock or hold the load without continuous live air pressure.
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