Airtac SAIJ200 Adjustable Cylinder SAIJ200BX425-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200BX425-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 425mm 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
- Stroke425 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 SAIJ200BX425-20
The AirTAC SAIJ200X425-20 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications, featuring a 425 mm nominal stroke that can be fine-tuned down by up to 20 mm via a rear adjusting screw. This yields a usable travel window of 405-425 mm, allowing precise end-position calibration during commissioning without swapping hardware. It delivers substantial thrust, generating 15708 N of push force at 0.5 MPa and reaching 21991 N at 0.7 MPa.
Equipped with a SUS304 stainless steel rod (code B) and PT tapered port threads, this 200 mm bore unit is built for demanding environments. The extruded aluminum barrel incorporates sensor grooves on both sides for CMSE or DMSE switches, though this specific SKU is supplied without a magnet. The rear adjuster functions strictly as a travel stop to set the retract position and relies on the integrated air cushions for deceleration; it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200BX425-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200BX425-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 425 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 SAIJ200BX425-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×425 | 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 SAIJ200BX425-20 Is Used
Heavy Press Positioning
Dial in the exact 405-425 mm end-stop during machine commissioning to ensure precise pressing force on large components without adding external mechanical stops.
Product Size Changeover
Quickly adjust the retract position on a packaging line to accommodate different pallet heights, using the 20 mm trim to fine-tune the stroke for each new product run.
Large Assembly Tooling
Leverage the 15708 N push force at 0.5 MPa to move heavy fixtures into place, relying on the rear screw to set the exact home position for accurate part alignment.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200BX425-20 the Right Cylinder?
Selecting this 200 mm bore cylinder is appropriate when an application requires up to 21991 N of push force at 0.7 MPa and exact end-stop control. If a smaller footprint is acceptable, stepping down to a 160 mm bore provides 14074 N at 0.5 MPa, whereas this model is necessary when the 15708 N baseline at 0.5 MPa is mandatory. The adjustable stroke is chosen over a fixed SAI cylinder when machinery requires variable end-stops or product-size changeovers, letting operators dial in the 405-425 mm window on the fly. Because the nominal stroke is 425 mm, an external guide should be used to support the load and mitigate side-loading on the 40 mm rod.
For a direct ISO 15552 replacement match, ensure the configuration specifies a 200 mm bore, 425 mm stroke, 20 mm adjustment range, PT port threads, and the SUS304 rod material. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. If the machine design requires the cylinder to hold its position securely without live air, this adjustable stopper is insufficient; consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ200BX425-20 FAQ
At 0.5 MPa, this 200 mm bore cylinder provides 15708 N of push force and 15080 N of pull force. If the operating pressure is increased to 0.7 MPa, the push force rises to 21991 N.
The rear adjusting screw acts as a mechanical stop that lets you shorten the 425 mm nominal stroke by up to 20 mm, creating a usable travel window of 405-425 mm. It only sets the end position and does not lock the load without live air pressure.
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