Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-40
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX70-40 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 SAIJ40AX70-40
The AirTAC SAIJ40X70-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 70 mm stroke that can be dialed back by up to 40 mm, creating a highly flexible 30-70 mm usable travel window.
This specific SKU is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance, and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE or DMSE switches later without changing the cylinder body.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-40 |
|---|---|
| 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 SAIJ40AX70-40
| 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 SAIJ40AX70-40 Is Used
Product Changeovers
Dial in the exact 30 to 70 mm end-stop during format size changes on a packaging line without swapping out the entire cylinder.
End-Position Tuning
Fine-tune the retract distance during machine commissioning to perfect the seating pressure of delicate components.
Variable Assembly Stops
Adjust the stroke window on the fly for assembly stations that handle multiple product variants with different heights.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-40 the Right Cylinder?
Choose this 40 mm bore when an application requires fine-tuning the retract end-position during commissioning or product changeovers, rather than relying on a fixed-stroke SAI cylinder. If your setup needs 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 stroke is short, side-load stress is minimal, but note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air. For position holding without pneumatic pressure, consider an external rod lock or AirTAC SAIL. This model uses PT ports and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, ensuring seamless ISO 15552 dimensional interchangeability.
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 SAIJ40AX70-40 FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 70 mm nominal stroke by up to 40 mm. This creates a usable travel window of 30 to 70 mm, enabling precise end-position tuning at commissioning without external stops.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40AX70-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.