Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-40S
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX85-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 85mm 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
- Stroke85 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 SAIJ40AX85-40S
The AirTAC SAIJ40X85-40-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 45 to 85 mm. An integrated magnet allows seamless position detection with AirTAC CMSE reed and DMSE electronic sensors.
This variant utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible switch mounting. You can fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops, while the adjustable screw acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 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 SAIJ40AX85-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SAIJ40AX85-40S Is Used
Product Changeover
Dial in the exact end-stop during format size changes on a packaging line, shifting the travel window between 45 and 85 mm without mechanical rebuilds.
Machine Setup
Fine-tune the retract position during initial commissioning to perfect a pressing or clamping operation using the rear adjustment screw.
Variable End Stops
Accommodate multiple part lengths on a single conveyor station by adjusting the stroke stopper on the fly to meet specific dimensional needs.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX85-40S the Right Cylinder?
Select this 40 mm bore when an application requires precise end-position tuning within a 45-85 mm window, stepping down from a 63 mm bore that yields 2182 N at 0.7 MPa if lower force is acceptable, or stepping up from a 32 mm bore that provides 563 N. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, offering greater flexibility than a fixed-stroke SAI cylinder. To match this exact ISO 15552 replacement, specify: 40 mm bore, 85 mm stroke, 40 mm adjustment, PT ports, SUS420J2 rod, and the -S magnet. The 16 mm rod handles side loads well, though any stroke of 300 mm or more still requires an external guide. For load-holding without live air, use a SAIL or BSAI cylinder instead of relying on the adjuster.
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 SAIJ40AX85-40S FAQ
The rear adjuster screw allows you to shorten the 85 mm nominal stroke by up to 40 mm, creating a usable travel window of 45 to 85 mm. The screw functions as a mechanical stop to tune the end position and does not lock the load without continuous air pressure.
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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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