Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75S 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 SAIJ40BX700-75S
The AirTAC SAIJ40X700-75-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 75 mm. This creates a highly flexible 625-700 mm usable end-position window, perfect for fine-tuning machinery during commissioning or product changeovers without swapping the entire actuator. It delivers 628 N of push force at 0.5 MPa and utilizes a G1/4 port.
Built with a SUS304 stainless steel rod (option B), this model provides excellent corrosion resistance for demanding environments. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position detection. The rear adjuster acts purely as a travel stop for deceleration and end-position setting, not as a lock to hold loads without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75S |
|---|---|
| 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 SAIJ40BX700-75S
| 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 SAIJ40BX700-75S Is Used
Machine Changeover
Rapidly adjust the 625-700 mm travel window during product size changeovers to accommodate different packaging formats without changing the cylinder.
End-Position Tuning
Fine-tune the exact retract distance during initial commissioning using the rear stopper screw, avoiding the need to add external shims or spacers.
Variable Stops
Act as an adjustable diverter or stop gate on a conveyor line where the exact stopping position must be tweaked on the fly for different items.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-75S the Right Cylinder?
Choose this 40 mm bore when an application requires moderate force, such as the 628 N push or 528 N pull available at 0.5 MPa; step up to a 50 mm bore if you need 982 N push force, or down to a 32 mm bore for lighter 402 N loads. The adjustable stroke is selected over a fixed SAI cylinder when variable end-stops are needed for machine setup or accommodating varying product sizes on a single line. For load-holding without continuous air pressure, this cylinder is insufficient as the adjuster is only a stop, so you should explore an AirTAC SAIL or BSAI locking cylinder instead.
Because this configuration features a 700 mm stroke, the 16 mm diameter rod and M12x1.25 rod thread will experience amplified side loads if the load is unsupported. An external guide mechanism is strongly recommended to prevent binding. To match this exact ISO 15552 footprint for a replacement, verify the 40 mm bore, 700 mm stroke, 75 mm adjustment range, PT tapered port threads, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting style, and the -S magnet requirement.
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 SAIJ40BX700-75S FAQ
At a 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 can deliver up to 128 kgf.
The rear adjuster screw allows you to shorten the effective travel from the nominal 700 mm down by up to 75 mm, providing a usable stroke window of 625-700 mm. It functions as a mechanical stop to set the end position and does not lock the load without live air.
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