Airtac SAIJ40 Adjustable Cylinder SAIJ40X65-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X65-20 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40X65-20
The AirTAC SAIJ40X65-20 is a double-acting, single-rod profile cylinder that is dimensionally interchangeable per ISO 15552. It features a rear-mounted stroke adjuster that allows you to dial back the nominal 65 mm travel by up to 20 mm, creating a precise 45-65 mm usable window for end-position tuning at commissioning. This bore delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
Unlike a fixed-stroke SAI cylinder, this adjustable model eliminates the need to swap components or bolt on external stops during product changeovers. The extruded aluminum barrel includes dual sensor grooves for mounting CMSE reed or DMSE electronic switches, though this specific configuration omits the -S magnet. Remember that the rear adjuster acts only as a mechanical stop to set deceleration; it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X65-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X65-20 |
|---|---|
| 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 SAIJ40X65-20
| 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 SAIJ40X65-20 Is Used
Machine Changeover
Dial in the 45-65 mm travel window during product size transitions without physically swapping the cylinder or adding external shims to the fixture.
End-Stop Calibration
Fine-tune the retract end-position precisely during commissioning using the rear adjuster screw, ensuring perfect alignment before final lockdown.
Variable Diverter Arm
Adjust the stroke length on a sorting diverter to accommodate different package sizes on the fly, relying on the 628 N thrust to push products reliably.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X65-20 the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N of thrust at 0.5 MPa but demands a variable end-stop, allowing you to fine-tune the travel window between 45 and 65 mm on the fly. If your setup requires less force, stepping down to a 32 mm bore yields 402 N of push force, while moving up to a 50 mm bore provides 982 N. For operations that require true load-holding without continuous air pressure, a standard SAIJ will not suffice, and you should look toward the SAIL air-released lock or BSAI clamp-lock series.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 65 mm nominal stroke, 20 mm adjustment range, PT tapered port thread, and standard carbon steel rod. The SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the stroke is under 300 mm, side-load stress on the 16 mm rod and M12x1.25 thread is minimal, though an external guide is still recommended for heavy lateral loads.
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 SAIJ40X65-20 FAQ
The rear adjuster acts as a mechanical stop that shortens the effective travel. For this model, you can trim the 65 mm nominal stroke back by up to 20 mm, giving a usable travel window of 45 to 65 mm. It only sets the end position and does not lock the load without live air.
At a 0.5 MPa operating pressure, the SAIJ40X65-20 generates 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 of thrust.
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