Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-10S
The AirTAC SAIJ40X40-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 40mm nominal stroke by up to 10mm. This creates a precise 30-40mm usable travel window, allowing you to fine-tune the retract end-position at commissioning without adding external stops. Delivering 628N of push force at 0.5 MPa, it handles moderate actuation tasks with ease.
Built with a SUS304 stainless steel rod, this variant is suited for environments where standard carbon steel might face corrosion concerns. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic switches for exact position feedback. It uses a PT tapered port and supports the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAIJ40BX40-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SAIJ40BX40-10S Is Used
Machine Setup & Changeover
Quickly dial in the exact 30-40mm end-position during product line changeovers without swapping out the entire cylinder or adding external stopper blocks.
Variable End-Stop Positioning
Perfect for assembly stations that need minor retract adjustments to accommodate different component heights or tolerances on the fly.
Corrosion-Resistant Testing
The SUS304 stainless steel rod performs reliably in testing environments or applications where standard carbon rods face moisture or mild corrosive elements.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-10S the Right Cylinder?
Select this 40mm bore when an application requires slightly more force than the 32mm version (which provides 402N push at 0.5 MPa) but does not need the heavier 982N output of the 50mm class. The adjustable stroke is highly beneficial for machine setups requiring variable end-stops or product changeovers, saving time over a fixed-stroke SAI cylinder. Because the total stroke is under 300mm, side-load stress on the 16mm rod is minimal, though external guides are still recommended for heavy lateral loads.
For ISO 15552 replacement matching, verify the 40mm bore, 40mm stroke, 10mm adjustment range, PT port thread, and the required -S magnet. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for true load-holding, consider an SAIL or BSAI cylinder.
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 SAIJ40BX40-10S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective travel from the 40mm nominal stroke down to as little as 30mm, creating a 30-40mm usable window. It only sets the end position and does not lock or hold the load without continuous air pressure.
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