Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50S 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
- 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 SAIJ200BX850-50S
The AirTAC SAIJ200X850-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers massive thrust, pushing 28274 N at 0.9 MPa, making it suited for heavy-duty positioning. The integrated -50 mm adjustment mechanism allows you to dial back the 850 mm nominal stroke, creating an exact 800-850 mm usable travel window for fine-tuning during commissioning.
This model features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the PT tapered port threads ensure a robust pneumatic seal for its G3/4 ports.
Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50S |
|---|---|
| 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 SAIJ200BX850-50S
| 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 SAIJ200BX850-50S Is Used
Heavy Machinery Changeover
Dial in the 800-850 mm stroke window during heavy equipment product changeovers to accommodate different large fixture sizes without swapping the actuator.
Large Press Positioning
Leverage the 28274 N push force at 0.9 MPa to move heavy press tooling, using the rear stopper to precisely set the final retraction depth.
Bulk Material Diversion
Drive large-scale conveyor diverters where the exact end-stop position must be fine-tuned on-site to match varying pallet dimensions.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200BX850-50S the Right Cylinder?
Selecting this 200 mm bore cylinder is appropriate when your application requires up to 15708 N of push force at a standard 0.5 MPa, stepping up significantly from the 100 mm bore which yields 3927 N at the same pressure. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops or precise product changeover tuning without adding external mechanical stops. For load-holding without live air pressure, note that the rear adjuster acts only as a travel stop and not a lock; you should instead utilize an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
Because this cylinder features an 850 mm stroke, the long unsupported piston rod is susceptible to side-loading; an external guide rail must be incorporated to prevent premature seal wear. When matching this for an ISO 15552 replacement, verify the 200 mm bore, 850 mm stroke, 50 mm adjustment range, G3/4 PT ports, and the required mounting style from the available SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
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 SAIJ200BX850-50S FAQ
At 0.5 MPa, this 200 mm bore cylinder provides 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 allows you to shorten the effective travel from the 850 mm nominal stroke down to as little as 800 mm, providing a 50 mm tuning window. It only sets the travel end and does not lock the load without live air.
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