Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-75S
The AirTAC SAIJ40X210-75-S 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 utilizes a PT tapered port thread. Equipped with a -S magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors.
This specific SKU provides a generous 135-210mm usable travel window, allowing you to dial back the nominal 210mm stroke by up to 75mm. The SUS304 stainless steel rod (code B) offers excellent corrosion resistance. The rear adjuster acts purely as a travel stop for end-position tuning, meaning it cannot hold a load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 210 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 SAIJ40BX210-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×210 | 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 SAIJ40BX210-75S Is Used
Product Size Changeovers
Dial in the exact end-of-stroke position for varying package sizes on a packaging line without changing out the physical cylinder hardware.
Machine Setup Commissioning
Fine-tune the 135-210mm travel window during initial machine commissioning to perfectly time the mechanical movements without adding external stops.
Variable End-Stop Diverter
Adjust the retract position on the fly for a conveyor diverter arm to handle different product lengths accurately.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-75S the Right Cylinder?
Choose this 40mm bore when an application requires moderate thrust and significant on-the-fly stroke variability; if you need less force, the 32mm bore provides 402N at 0.5 MPa. The wide 75mm adjustment window is perfect for product-size changeovers on a packaging line, eliminating the need to physically swap cylinders or bolt on external stops. When replacing an ISO 15552 cylinder, match the 40mm bore, 210mm nominal stroke, PT port, and mounting style. Note that SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB, CA, CB, and CR. Because the 210mm stroke is moderately long, ensure external guides support any heavy lateral loads to protect the 16mm rod.
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 SAIJ40BX210-75S FAQ
At 0.5 MPa, 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 lets you shorten the effective travel from the 210mm nominal stroke down to 135mm. It functions as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
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