Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40S 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 SAIJ40BX700-40S
The AirTAC SAIJ40X700-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 700 mm travel by up to 40 mm for a precise 660-700 mm usable window. It features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. Delivering 628 N of push force at 0.5 MPa, it handles mid-range actuation with ease.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops during machine setup or product changeovers. The rear screw acts purely as a travel stop to fine-tune the retract end position, meaning it does not hold the load without live air pressure. It uses a G1/4 port and shares the standard ISO 15552 mounting interface.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40S |
|---|---|
| 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 SAIJ40BX700-40S
| 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 SAIJ40BX700-40S Is Used
Product Size Changeovers
Quickly fine-tune the 660-700 mm retract end-stop on packaging lines when switching between different carton or product sizes without changing hardware.
Adjustable Diverting
Dial in the exact gating position on a conveyor to accommodate varying pallet widths during commissioning or line modifications.
Machine Setup Calibration
Set precise end positions during initial equipment assembly, allowing 40 mm of flexibility to perfectly align tooling without external shims.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40S the Right Cylinder?
Choose this 40 mm bore when you need more force than a 32 mm cylinder (which provides 402 N push at 0.5 MPa) but want a more compact footprint than a 50 mm option (982 N). The adjustable 660-700 mm travel window is perfect for applications requiring variable end-stops during commissioning. Because the stroke is 700 mm, the 16 mm rod needs external guiding to prevent excessive side-loading on the seals.
For an exact ISO 15552 replacement, match the 40 mm bore, 700 mm stroke, 40 mm adjustment, PT tapered port threads, and the -S magnet. Note that SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. If your application requires true load-holding without continuous air pressure, use an external rod lock or pilot-operated check valve, as this cylinder's adjuster is a stop, not a brake.
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 SAIJ40BX700-40S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N push force at its maximum 0.9 MPa operating pressure.
The rear adjuster screw allows you to shorten the 700 mm nominal stroke by up to 40 mm, creating a 660-700 mm travel window. It functions as a mechanical stop for end-position tuning and does not lock the load without live air.
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