Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-40
The AirTAC SAIJ40X80-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to fine-tune the end position during commissioning. It provides a usable travel window of 40 to 80 mm, letting you trim the nominal 80 mm stroke back by up to 40 mm without adding external stops. In the 40 mm bore class, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, operating at speeds from 30 to 800 mm/s.
This SKU 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 of CMSE reed or DMSE electronic sensors if a magnet is added later. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on some standard cylinders.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAIJ40BX80-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SAIJ40BX80-40 Is Used
Product Changeover Stops
Dial in the 40-80 mm travel window during format changes on a packaging line, adjusting the rear stopper to accommodate different carton sizes without swapping the cylinder.
Machine Setup Tuning
Fine-tune the exact end-of-stroke position during initial commissioning to align a pressing or clamping jaw perfectly, avoiding the need for machined spacer shims.
Variable End Stops
Set a precise retract position for a diverter arm on a conveyor, using the 40 mm adjustment range to alter the resting state for different product flows.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-40 the Right Cylinder?
Choose this 40 mm bore when you need precise end-position tuning on a 40-80 mm travel window, stepping down from a 50 mm bore (982 N push at 0.5 MPa) to save space, or up from a 32 mm bore (402 N push) for higher thrust. The rear adjuster screw acts purely as a mechanical stop to set the travel limit and the air cushions only manage deceleration; neither will hold a load without live air pressure. For load-holding requirements, consider an external pilot-operated check valve, or use the AirTAC SAIL or BSAI series instead. To replace an ISO 15552 cylinder, match the 40 mm bore, 80 mm stroke, 40 mm adjustment range, PT G1/4 port, and the appropriate mounting accessory.
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 SAIJ40BX80-40 FAQ
A rear stopper screw lets you mechanically shorten the effective stroke from 80 mm down to as little as 40 mm. This creates a 40-80 mm usable travel window for fine-tuning the end position at commissioning without replacing the cylinder.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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