Airtac SAIJ200 Adjustable Cylinder SAIJ200AX450-40
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX450-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 450mm 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
- Stroke450 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX450-40
The AirTAC SAIJ200X450-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a substantial 21991N push force at 0.7 MPa, utilizing a robust 40mm piston rod with an M36x2 thread. The integrated adjustment mechanism allows you to trim the effective travel back by up to 40mm, creating a precise 410-450mm usable stroke window for fine-tuning end positions during commissioning.
This variant is configured with a SUS420J2 stainless steel rod (option A) for enhanced surface durability and PT tapered port threads for reliable pneumatic sealing. The extruded aluminum barrel includes sensor grooves on both sides, allowing the direct mounting of CMSE reed and DMSE electronic switches when a magnet is specified. The rear adjuster functions purely as a mechanical travel stop to set deceleration limits and does not lock or hold the load without live air pressure.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX450-40 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX450-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 450 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 SAIJ200AX450-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×450 | 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 SAIJ200AX450-40 Is Used
Heavy Press Tuning
Dial in the exact bottoming position of a large stamping or forming press within the 410-450mm window without changing the cylinder or adding external mechanical stops.
Product Changeover
Quickly adapt automated heavy machinery to new product dimensions by adjusting the rear stopper screw during line changeovers, saving setup time.
Large Fixture Actuation
Position massive welding or clamping fixtures with 21991N of force at 0.7 MPa, making fine end-position adjustments on the fly during machine commissioning.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX450-40 the Right Cylinder?
Choose this 200mm bore cylinder when your application demands extreme thrust that smaller bores cannot provide, such as heavy pressing or large mold actuation. If your process requires less force, stepping down to a 160mm bore yields 14074N of push force at 0.7 MPa, which may offer a more compact footprint. The adjustable stroke design is specifically beneficial for machine setups requiring variable end-stops or product changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder or bolt on external stops.
When replacing an ISO 15552 cylinder, match the 200mm bore, 450mm stroke, 40mm adjustment range, PT port threads, and the desired mounting style. SAIJ supports a specific mounting subset including Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations. Because the 450mm stroke creates a long unsupported rod extension, an external guide is strongly recommended to prevent excessive side-loading and premature seal wear. For applications requiring true load-holding without continuous air pressure, consider the SAIL pneumatic lock or BSAI clamp-lock series instead of relying on the adjuster.
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 SAIJ200AX450-40 FAQ
At a 0.7 MPa operating pressure, this 200mm bore cylinder generates 21991N of push force and 15080N of pull force. It can deliver a maximum push force of 28274N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 450mm nominal stroke by up to 40mm, providing an effective travel range of 410 to 450mm. It is a travel stop, not a lock, and cannot hold a load without live air pressure.
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