Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-40 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 SAIJ40BX200-40
The AirTAC SAIJ40X200-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 200 mm travel that can be fine-tuned down by up to 40 mm, creating a precise 160-200 mm usable window. Delivering 879 N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance.
This model uses PT tapered port threads and omits the FB, CA, CB, and CR mounting options, retaining the core Basic, FA, LB, TC, FTC, TCM1, and TCM2 interface set. The rear screw acts purely as a travel stop to dial in end positions during commissioning; it does not lock the load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-40 |
|---|---|
| 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 SAIJ40BX200-40
| 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 SAIJ40BX200-40 Is Used
Product Changeovers
Dial in the 160-200 mm travel window during format changes on packaging lines without swapping out the entire cylinder body.
End-Stop Calibration
Fine-tune the retract position at machine commissioning using the rear screw, avoiding the need to add bulky external mechanical stops.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive industrial manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-40 the Right Cylinder?
Choose this 40 mm bore when an application requires 879 N of thrust at 0.7 MPa but demands on-the-fly end-position tuning without external stops. If your setup needs less force, stepping down to a 32 mm bore yields 563 N; stepping up to a 50 mm bore provides 1374 N. The adjustable 160-200 mm window is ideal for product changeovers, whereas a fixed-stroke SAI cylinder is better for rigid, unchanging endpoints.
Because this unit lacks a magnet for sensors, position detection requires external switches. For load-holding requirements without live air, note that this adjuster is not a brake—consider an external rod lock or the AirTAC SAIL lock variant. Additionally, with a 200 mm stroke, ensure external guides support any heavy lateral loads to protect the rod seals.
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 SAIJ40BX200-40 FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 738 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm, providing a usable travel range of 160 to 200 mm. This stopper only sets the end position and does not hold the load without air pressure.
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