Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75
The AirTAC SAIJ80X240-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 75 mm. This creates a usable movement window of 165 to 240 mm, letting you dial in the exact retract end-position during commissioning without swapping out the barrel or adding external stops. Built with an extruded aluminum profile, it delivers a robust 2513 N of push force at 0.5 MPa.
This specific configuration utilizes a SUS420J2 stainless steel rod (material code A) for enhanced durability against moisture, and features PT tapered port threads. The 25 mm rod diameter and M20x1.5 rod thread provide excellent resistance to side loading, though an external guide is still recommended for any unsupported loads. Mounting options include the standard SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 240 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×240 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX240-75 Is Used
Product Changeovers
Quickly adjust the retract end-position by up to 75 mm when switching between different product sizes on a packaging line, avoiding mechanical rebuilds.
Machine Setup
Fine-tune the 165 to 240 mm travel window during commissioning to perfectly time the stroke with downstream equipment without adding external stops.
Assembly Pressing
Leverage the 2513 N push force at 0.5 MPa for pressing operations where the exact end-of-stroke position must be dialed in precisely to avoid damaging components.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-75 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than a 63 mm cylinder (which provides 1559 N push at 0.5 MPa) but does not need the full 3927 N push force of a 100 mm unit. The 75 mm adjustment range is ideal for machinery that frequently handles product-size changeovers, as the rear stopper fine-tunes the retract distance on the fly. Remember that the rear adjuster acts only as a travel stop, not a lock; the cylinder cannot hold a load without live air pressure, so consider an AirTAC SAIL or BSAI model if true load-holding is required.
When specifying a replacement, verify the 80 mm bore, 240 mm nominal stroke, 75 mm adjustment range, PT port threads, and the SUS420J2 rod material. Because the nominal stroke is 240 mm, standard side-load precautions apply—ensure your mounting configuration adequately supports the rod to prevent premature seal wear. This model does not include a magnet for position sensing.
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 SAIJ80 Adjustable Cylinder SAIJ80AX240-75 FAQ
At an operating pressure of 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw acts as a mechanical stop that allows you to shorten the 240 mm nominal stroke by up to 75 mm, providing an effective travel range of 165 to 240 mm. It only sets the end position and does not lock the load without live air pressure.
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