Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50S 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 SAIJ40BX65-50S
The AirTAC SAIJ40X65-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 40mm bore delivering 628N of push force at 0.5 MPa, alongside a 16mm SUS304 stainless steel rod. The integrated magnet (-S) enables seamless position detection.
This specific SKU provides a nominal 65mm stroke that can be dialed back by up to 50mm, creating a highly versatile 15-65mm usable travel window. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of AirTAC CMSE reed or DMSE electronic solid-state switches.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50S |
|---|---|
| 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 SAIJ40BX65-50S
| 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 SAIJ40BX65-50S Is Used
Product Changeover
Dial in the 15-65mm travel window during format size changes on a packaging line without replacing the cylinder or adding external stops.
End-Position Tuning
Fine-tune the retract end position at machine commissioning to dial out mechanical play and achieve exact clamping depth.
Test Fixture Setup
Vary the actuation distance safely in laboratory testing equipment, relying on the SUS304 rod for corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50S the Right Cylinder?
Choose this adjustable model when your machine setup requires precise end-position tuning without swapping hardware; the rear stopper screw trims the retract stroke within the 15-65mm range. If your application needs less force, stepping down to a 32mm bore yields 402N, while stepping up to a 50mm bore provides 982N at 0.5 MPa.
The rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true pneumatic locking, consider the SAIL or BSAI series. To match this ISO 15552 footprint exactly, specify the 40mm bore, 65mm stroke, 50mm adjustment, PT tapered port threads, and the -S magnet. The SUS304 rod offers excellent corrosion resistance for harsher environments.
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 SAIJ40BX65-50S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 128 kgf.
The rear adjuster screw allows you to shorten the effective stroke from its 65mm nominal length by up to 50mm, providing a usable travel window of 15 to 65mm. This stopper decelerates the travel end but does not lock the load without continuous air pressure.
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