Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-30
The AirTAC SAIJ40X140-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 110 to 140 mm usable travel window, allowing you to dial back the 140 mm nominal stroke by up to 30 mm during commissioning. Delivering 628 N of push force at 0.5 MPa, it handles standard actuation tasks with precision.
This model features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting. Remember that the rear adjuster acts only as a travel stop to set end positions, not as a lock to hold loads without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 140 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 SAIJ40BX140-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×140 | 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 SAIJ40BX140-30 Is Used
Machine Changeover
Dial in the 110-140 mm end position during product size changes without physically replacing the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract stroke by up to 30 mm at commissioning to perfectly seat parts, compensating for mechanical tolerance stack-up.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in packaging or processing areas where moisture is present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-30 the Right Cylinder?
Choose this 40 mm bore cylinder when you need 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N push) for heavier workloads, or down from a 50 mm bore (982 N push) to save space. The 30 mm adjustment range is perfect for product changeovers, letting you fine-tune the end position without swapping cylinders or adding external stops. Because the stroke is 140 mm, side-loading is minimal, but always guide long unsupported loads. For load-holding without air pressure, select a SAIL or BSAI cylinder instead. To match this ISO 15552 footprint, specify a 40 mm bore, 140 mm stroke, 30 mm adjustment, PT G1/4 port, SUS304 rod, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings.
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 SAIJ40BX140-30 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 128 kgf.
A rear adjusting screw acts as a stopper, letting you shorten the effective stroke from 140 mm down to 110 mm. This mechanical stop sets the travel end but does not lock the load without live air pressure.
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