Airtac SAIJ40 Adjustable Cylinder SAIJ40AX700-20
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX700-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 700mm 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
- Stroke700 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 SAIJ40AX700-20
The AirTAC SAIJ40X700-20 is a double-acting, double-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. The built-in rear stopper provides a 680-700mm usable travel window, allowing you to dial back the 700mm nominal stroke by up to 20mm during commissioning without adding external stops. This cylinder uses an SUS420J2 stainless steel rod for enhanced durability and features PT tapered port threads.
Unlike a fixed-stroke SAI cylinder, this adjustable variant lets you fine-tune the retract end-position on the fly for product changeovers. The rear adjuster acts purely as a travel stop and works alongside the 30mm variable air cushions at both ends to decelerate the load. It does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. The extruded aluminum barrel includes sensor grooves on both sides for mounting position switches.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX700-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX700-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 700 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 SAIJ40AX700-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×700 | 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 SAIJ40AX700-20 Is Used
Machine Changeover
Dial in the 680-700mm retract position during product size changes without replacing the cylinder or bolting on external stoppers.
Variable End-Stop Diverter
Fine-tune the exact push distance on a conveyor diverter arm to accommodate varying package lengths on the fly.
Press Fit Tuning
Adjust the 20mm travel window during setup to achieve the exact insertion depth for a light-duty press fit operation.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX700-20 the Right Cylinder?
The 20mm adjustment range is ideal for setups needing precise end-stop tuning without swapping cylinders. To match this ISO 15552 cylinder for replacement, verify the 700mm stroke, 20mm adjuster, G1/4 port, and PT thread type. Because the 700mm stroke is long, an external guide is recommended to prevent excessive side-loading on the 16mm rod.
This SAIJ model supports the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. It is not a load-locking device; the rear adjuster only sets the travel end. For position sensing, the standard version without a magnet (-S) requires external switches, whereas an -S variant would support AirTAC CMSE reed and DMSE electronic sensors.
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 SAIJ40AX700-20 FAQ
The standard speed range for this 40mm bore is 30-800 mm/s.
The rear adjuster screw lets you shorten the 700mm nominal stroke by up to 20mm, creating a 680-700mm usable travel window. It acts as a mechanical stop to set the end position and is not a load-holding lock.
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