Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40S
The AirTAC SAIJ40X65-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 65 mm travel that can be dialed back by up to 40 mm, creating a highly versatile 25-65 mm usable stroke window for precise end-position tuning during commissioning. Operating at 0.5 MPa, it delivers 628 N of push thrust and 528 N of pull force.
This variant 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, and the integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE solid-state switches. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 65 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 SAIJ40BX65-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×65 | 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 SAIJ40BX65-40S Is Used
End-Position Tuning
Dial in the exact 25 to 65 mm travel distance during machine commissioning to perfect product indexing without changing cylinders.
Product Changeover
Quickly adapt the rear stopper on packaging lines when switching to different product sizes, saving setup time.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for precise clamping and positioning tasks in environments requiring high corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-40S the Right Cylinder?
Select this 40 mm bore when an application demands on-the-fly stroke adjustments without swapping hardware or adding external stops, unlike a fixed-stroke SAI cylinder. If your setup requires less force, stepping down to a 32 mm bore yields 402 N of push thrust at 0.5 MPa; conversely, a 50 mm bore provides 982 N for heavier loads.
For load-holding requirements, remember the rear adjuster acts only as a travel stop and the air cushions provide deceleration, neither of which locks the load without live air pressure. For true pneumatic locking, consider the SAIL or BSAI series. To match this ISO 15552 footprint exactly, specify the 40 mm bore, 65 mm stroke, 40 mm adjustment, PT ports, and the -S magnet option.
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 SAIJ40BX65-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N of push force at 0.9 MPa.
The rear adjusting screw allows you to shorten the effective stroke by up to 40 mm from the nominal 65 mm, giving a usable travel window of 25 to 65 mm. This stopper only sets the end position; it does not lock the load without live air.
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