Airtac SAIJ40 Adjustable Cylinder SAIJ40AX35-20
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX35-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 35mm 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
- Stroke35 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 SAIJ40AX35-20
The AirTAC SAIJ40X35-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 15-35 mm, allowing you to dial back the 35 mm nominal stroke by up to 20 mm during commissioning.
This variant uses a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept CMSE reed or DMSE electronic sensors if a magnet is added later. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX35-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX35-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 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 SAIJ40AX35-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 SAIJ40AX35-20 Is Used
Machine Setup Tuning
Dial in the exact 15-35 mm travel end-stop during initial commissioning to perfectly time the stroke without adding external stopper blocks.
Product Changeover
Quickly adjust the effective stroke on a packaging line when handling slightly different product sizes, reducing downtime between runs.
End-Position Trimming
Fine-tune the retract end position to accommodate mechanical wear or slight variations in tooling offsets without replacing the cylinder.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX35-20 the Right Cylinder?
Choose this adjustable-stroke model when you need fine end-position tuning at machine setup or product changeover without swapping out the entire cylinder.
Because the SAIJ40X35-20 has a short 35 mm stroke, side-load risks from an unsupported load are minimal, but the rod diameter and M12x1.25 thread should still be guided for any lateral forces. Remember that the rear adjuster and air cushions only decelerate the travel end—neither holds the load without live air. For true load-holding without continuous pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
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 SAIJ40AX35-20 FAQ
At the maximum pressure of 1.0 MPa, it can achieve up to 128 kgf.
The rear adjuster screw allows you to shorten the 35 mm nominal stroke by up to 20 mm, creating a usable travel window of 15-35 mm. The adjuster acts as a mechanical stop to fine-tune the end position and does not lock or hold the load without live air pressure.
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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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