Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75
The AirTAC SAIJ40X700-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 625 to 700 mm. Delivering 879 N of push force at 0.7 MPa, it is equipped with a SUS304 stainless steel rod for enhanced corrosion resistance and a PT tapered port thread.
This adjustable-stroke design eliminates the need to swap cylinders or add external stops during product changeovers. The rear adjuster functions purely as a travel stop to set the end position, while the shared extruded aluminum barrel provides sensor grooves on both sides for flexible mounting of CMSE and DMSE switches.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 700 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 SAIJ40BX700-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×700 | 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 SAIJ40BX700-75 Is Used
Machine Setup & Commissioning
Dial in the exact end position during initial machine commissioning, trimming up to 75 mm of travel to perfect the stroke without swapping hardware.
Product Size Changeovers
Quickly adapt a packaging line to varying product lengths by adjusting the rear stopper, reducing downtime between production runs.
Variable End Stops
Set precise retract positions for multi-stage assembly processes where the cylinder must return to slightly different home positions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75 the Right Cylinder?
Choose this 40 mm bore model when an application requires precise end-position tuning at commissioning without the hassle of external stops. If you need higher force, stepping up to the 63 mm bore yields 2182 N at 0.7 MPa; stepping down to the 32 mm bore provides 563 N. Because the 700 mm stroke is relatively long, an external guide is recommended to handle side loading and prevent rod wear.
To replace an ISO 15552 cylinder, match the 40 mm bore, 700 mm stroke, PT port thread, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interface. Remember that the rear adjuster is a stop, not a lock; if you need to hold a load securely without live air pressure, consider the SAIL or BSAI series instead.
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 SAIJ40BX700-75 FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N at 0.9 MPa.
The rear adjuster acts as a travel stop, allowing you to shorten the effective stroke from 700 mm down to 625 mm. It is not a load-holding lock; it only sets the end position while air pressure is applied.
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