Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50 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 SAIJ40BX65-50
The AirTAC SAIJ40X65-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 15-65 mm, letting you dial back the 65 mm nominal stroke by up to 50 mm during commissioning. It delivers a 0.5 MPa push force of 628 N and pull force of 528 N.
This variant uses a SUS304 stainless steel rod for corrosion resistance and features PT tapered port threads. It carries the standard SAIJ mounting set, including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. The rear screw acts strictly as a travel stop, not a lock, so live air is required to hold the load.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50 |
|---|---|
| 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 SAIJ40BX65-50
| 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 SAIJ40BX65-50 Is Used
Machine Setup Tuning
Fine-tune the 15-65 mm travel window during initial commissioning to perfectly align end positions without mechanical shimming.
Product Changeover
Quickly adjust the retract stop for different product sizes on a single line, minimizing downtime between runs.
Assembly Stations
Use the 628 N push force at 0.5 MPa for pressing and clamping parts where exact end-of-stroke positioning is critical.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX65-50 the Right Cylinder?
Choose this 40 mm bore when you need precise end-position tuning without swapping cylinders or adding external stops. If your application requires less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa. If more thrust is needed, a 50 mm bore provides 982 N. The 16 mm rod and M12x1.25 thread handle moderate side loads, but long unsupported strokes still need an external guide. For load-holding without live pressure, consider SAIL or BSAI variants instead of relying on the adjuster.
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 SAIJ40BX65-50 FAQ
It features a rear adjusting screw that lets you shorten the effective stroke by up to 50 mm, providing a usable travel window of 15 to 65 mm without changing the cylinder itself.
At 0.5 MPa operating pressure, it provides a push force of 628 N and a pull force of 528 N. At 0.7 MPa, the push force increases to 879 N.
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