Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 425mm 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
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50
The AirTAC SAIJ80X425-50 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster that allows you to trim the effective stroke by up to 50 mm. This yields a precise usable travel window of 375 to 425 mm, enabling exact end-position tuning at commissioning without swapping out the entire actuator. It delivers robust performance with 2513 N of pull force at 0.5 MPa and operates at speeds between 30 and 800 mm/s.
Built with an extruded aluminum barrel housing sensor grooves on both sides, this model omits standard tie-rod construction in favor of a clean profile design. It is configured with a SUS420J2 stainless steel rod for enhanced corrosion resistance and utilizes PT tapered port threads. The rear stopper screw acts purely as a travel end-limit and works in tandem with the standard variable air cushions to decelerate the load, but it does not lock or hold the position without continuous live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 425 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 SAIJ80AX425-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SAIJ80AX425-50 Is Used
Variable End-Stop Positioning
Ideal for assembly lines processing multiple product sizes, allowing operators to dial in the stroke from 375 to 425 mm on the fly without adding external mechanical stops.
Commissioning Fine-Tuning
Perfect for dialing in exact end-of-stroke positions during machine setup, absorbing mechanical tolerance drifts by adjusting the rear screw rather than re-piping the pneumatic system.
High-Force Changeover Actuation
Delivers 2513 N of pulling force at 0.5 MPa for heavy-duty forming or clamping tasks where the exact material thickness varies, requiring a 50 mm adjustable travel window.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX425-50 the Right Cylinder?
Select this 80 mm bore actuator when an application demands high thrust combined with variable end-stops for product changeovers. If the 2513 N pull force at 0.5 MPa is excessive for your payload, stepping down to a 63 mm bore yields 1402 N, whereas moving up to a 100 mm bore provides 3681 N. The adjustable stroke is ideal for fine-tuning machinery setup, whereas a fixed-stroke SAI cylinder is better suited for dedicated, single-purpose stations.
Because the 425 mm stroke creates a long unsupported rod extension, incorporating an external guide is highly recommended to prevent excessive side-loading and premature seal wear. To replace an existing ISO 15552 cylinder, verify the 80 mm bore, 425 mm stroke, 50 mm adjustment range, G3/8 port, and your required mounting style. Remember that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. If true load-holding is required without live air, consider the SAIL or BSAI series 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 SAIJ80AX425-50 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of pull force and 3518 N of push force. It can achieve a maximum push force of 4523 N at 0.7 MPa.
The rear adjuster screw allows you to shorten the nominal 425 mm stroke by up to 50 mm, providing an effective travel range of 375 to 425 mm. This stopper limits the retract stroke but does not lock the load without live air pressure.
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