Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75
The AirTAC SAIJ40X200-75 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 628N of push force at 0.5 MPa and uses a G1/4 port. By turning the rear screw, you can trim the 200mm nominal stroke back by up to 75mm, creating a highly flexible 125-200mm usable travel window for precise end-position tuning.
This variant features a SUS304 stainless steel rod (code B) for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a magnet. The rear adjuster acts purely as a mechanical stop to set deceleration and end limits, meaning it will not hold a load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX200-75 Is Used
Product Changeovers
Dial in the 125-200mm travel window during format changes on a packaging line, using the rear screw to hit new end positions instantly without changing the cylinder.
Commissioning Calibration
Fine-tune the final retract position during machine setup, absorbing mechanical tolerances by trimming up to 75mm off the nominal stroke directly at the actuator.
Variable End Stops
Provide adjustable mechanical stops for testing stations where the retract distance must be altered between cycles, relying on the rear stopper to set the precise limit.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-75 the Right Cylinder?
Choose this 40mm bore when an application requires approximately 628N push force at 0.5 MPa, stepping up from a 32mm bore (402N) if more thrust is needed, or down from a 50mm bore (982N) to save space. The generous 75mm adjustment range is selected over a fixed-stroke SAI cylinder when a machine handles frequent product changeovers, allowing operators to dial in the exact 125-200mm travel without swapping hardware.
Because the 200mm stroke is under the 300mm threshold, side-load stress is moderate, but the 16mm rod still requires an external guide for heavy lateral loads. To replace an ISO 15552 cylinder, match the 40mm bore, 200mm stroke, PT tapered port thread, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that SAIJ omits FB, CA, CB, and CR mounts. If your process requires true load-holding without live air, select an AirTAC SAIL or BSAI 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 SAIJ40 Adjustable Cylinder SAIJ40BX200-75 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw allows you to shorten the 200mm nominal stroke by up to 75mm, providing an effective travel window of 125-200mm. It acts as a mechanical stop to set the end position and does not lock the load without live air.
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