Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50 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 SAIJ200BX850-50
The AirTAC SAIJ200X850-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the effective travel window down to 800-850 mm without adding external stops. Built with a SUS304 stainless steel rod and PT tapered port threads, it delivers a massive 15080 N pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for straightforward positioning feedback.
Because the stroke exceeds 300 mm, the 40 mm rod diameter and M36x2 thread provide substantial rigidity, but an external guide is still recommended to manage side loads over this long travel distance. The rear adjuster functions strictly as a travel stop for end-position tuning, not a lock, meaning it will not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50 |
|---|---|
| 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 SAIJ200BX850-50
| 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 SAIJ200BX850-50 Is Used
Heavy Press Tuning
Dial in the exact 800-850 mm end position for large metal forming or heavy pressing tasks during initial commissioning.
Product Size Changeover
Quickly adjust the travel stop to accommodate varying large product dimensions on automated packaging lines without swapping cylinders.
Long-Stroke Ejection
Manage the extended ejection of heavy molded parts, using the rear stopper to safely shorten the return end-position as needed.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50 the Right Cylinder?
Choose this 200 mm bore when your application requires extreme thrust, such as 21991 N push force at 0.7 MPa. If you can step down to a 160 mm bore, you will see a lower 9425 N pull force at 0.5 MPa but gain a more compact footprint. The adjustable 800-850 mm travel window is ideal for machine setups requiring variable end-stops during product changeover rather than relying on a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 850 mm stroke, 50 mm adjustment range, PT port threads, and standard mounting interface. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Since no magnet is specified, position sensing via CMSE or DMSE switches is not enabled.
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 SAIJ200BX850-50 FAQ
At an operating pressure of 0.5 MPa, the SAIJ200X850-50 delivers 15708 N of push force and 15080 N of pull force. At 0.9 MPa, the push force increases to 28274 N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the nominal 850 mm down to 800 mm. It sets the end position during commissioning but does not lock the load without continuous air pressure.
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