Airtac SAIJ40 Adjustable Cylinder SAIJ40AX65-50
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX65-50 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- 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 SAIJ40AX65-50
The AirTAC SAIJ40X65-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 65 mm travel. This creates a usable stroke window of 15 to 65 mm, giving you precise control over the retract end position without adding external stops. In its base configuration, this model uses an SUS420J2 stainless steel rod for enhanced corrosion resistance compared to standard carbon steel.
It features a PT tapered G1/4 port and variable air cushions at both ends to manage deceleration. Note that the rear adjuster functions strictly as a travel stop and does not lock the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX65-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX65-50 |
|---|---|
| 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX65-50
| 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 SAIJ40AX65-50 Is Used
Product Changeover
Dial in the 15-65 mm travel window to accommodate varying product lengths on a single conveyor line without physically swapping cylinders.
Machine Setup
Use the rear stopper to fine-tune the exact retract position during commissioning, eliminating the need to bolt on custom external stops.
Variable End Stops
Achieve precise end-position tuning for light-duty clamping or positioning tasks where a fixed 65 mm stroke would be too rigid.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX65-50 the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end positions or frequent product-size changeovers, as the 15-65 mm travel window can be fine-tuned at commissioning rather than swapping a fixed-stroke SAI cylinder. If your application requires less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; stepping up to a 50 mm bore provides 982 N.
Because the 65 mm stroke is relatively short, side-loading stress is minimal, but the 16 mm rod and M12x1.25 thread still require an external guide for heavy radial loads. To match this exact configuration for an ISO 15552 replacement, specify the 40 mm bore, 65 mm stroke, 50 mm adjustment, PT port thread, and no magnet. Remember that for load-holding without live pressure, you must look to the SAIL or BSAI series, as the SAIJ adjuster is not a brake.
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 SAIJ40AX65-50 FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective stroke by up to 50 mm. This creates a usable travel window of 15 to 65 mm, allowing you to set the exact retract position at commissioning without replacing the cylinder.
At 0.7 MPa, the push force increases to 879 N.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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