Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-30
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX70-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 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 SAIJ40AX70-30
The AirTAC SAIJ40X70-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a nominal stroke of 70 mm and a 30 mm adjustment range, it provides a usable travel window of 40 to 70 mm. This flexibility is ideal for dialing in exact positioning at commissioning without needing external stops.
This variant features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit lacks a magnet for position sensing. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 SAIJ40AX70-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SAIJ40AX70-30 Is Used
Machine Changeover
Quickly adjust the travel window from 40 to 70 mm during product size changes without replacing the cylinder or adding mechanical shims.
End-Position Tuning
Fine-tune the retract end position at commissioning to achieve precise alignment, utilizing the rear stopper to dial in the exact 0-30 mm offset.
Variable Stops
Provide adjustable physical stops for diverter arms or pushers on a conveyor line, accommodating varying package sizes on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-30 the Right Cylinder?
The 30 mm adjustment window is significantly useful for product changeovers on a line, allowing operators to vary the stroke between 40 and 70 mm rather than swapping out a fixed-stroke SAI cylinder.
Because the stroke is under 300 mm, side-load stress on the 16 mm rod is manageable, though external guides are still recommended for heavy lateral loads. For load-holding without continuous air pressure, this cylinder is insufficient since the adjuster is only a stop; you would need an external pilot-operated check valve or a related type like the SAIL (air-released lock) or BSAI (clamp-lock). This model uses a PT port and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mountings.
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 SAIJ40AX70-30 FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm. This creates a usable travel window of 40 to 70 mm, letting you set the exact end position without changing the cylinder.
At 0.7 MPa, the push force increases to 879 N.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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