Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75S
The AirTAC SAIJ80X135-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 60 to 135 mm without adding external stops. It delivers a robust 2513 N push force at 0.5 MPa, making it well-suited for medium to heavy actuation tasks. The barrel is extruded aluminum with sensor grooves on both sides.
Equipped with a -S magnet, this unit supports AirTAC CMSE reed and DMSE electronic solid-state sensors for precise end-of-stroke detection. The rear adjuster acts purely as a mechanical stop to set the retract position, while the standard PT G3/8 port and 25 mm carbon steel rod handle high side-load stresses effectively.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 135 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 SAIJ80X135-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×135 | 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 SAIJ80X135-75S Is Used
Variable End-Stop Tuning
Ideal for packaging lines where the retract position must be adjusted by up to 75 mm to accommodate different carton sizes without changing the physical cylinder mounting.
Machine Setup & Commissioning
Allows engineers to fine-tune the 60-135 mm travel window during initial machine build, compensating for mechanical tolerances and perfectly timing the end-of-stroke position.
Product Size Changeover
Provides rapid changeover capability on automated assembly lines, letting operators dial back the stroke to match new product dimensions while relying on the 2513 N force for actuation.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-75S the Right Cylinder?
Choose this 80 mm bore when your application requires more thrust than the 50 mm bore (which provides 982 N push at 0.5 MPa), but you do not need the full 3927 N output of the 100 mm version. The 75 mm adjustment range is ideal for machines that undergo frequent product changeovers, allowing operators to dial in the exact end position on the fly rather than swapping out a fixed-stroke SAI cylinder.
When matching this ISO 15552 cylinder for a retrofit, verify the 135 mm nominal stroke, up to 75 mm adjustment, PT G3/8 port, and the -S magnet option. Because the nominal stroke is 135 mm, an external guide is recommended for optimal side-load management. Remember that the rear adjuster is a travel stop, not a lock; if you need to hold the load without live air pressure, specify an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ80X135-75S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can deliver up to 4523 N of push force at its maximum 0.9 MPa pressure rating.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 135 mm down to 60 mm. This creates a 60-135 mm adjustable travel window for fine-tuning end positions at commissioning or during product changeovers, without acting as a load lock.
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