Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-30
The AirTAC SAIJ80X850-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 820 to 850 mm, allowing you to dial back the nominal 850 mm stroke by up to 30 mm during commissioning. Since the 850 mm stroke exceeds the standard 1500 mm maximum for this bore, it is built as a non-standard, made-to-order unit. It delivers a robust 2268 N pull force at 0.5 MPa.
This model features a SUS420J2 stainless steel rod and PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides. It supports a speed range of 30-800 mm/s and uses adjustable air cushions at both ends to decelerate the load. The rear adjuster acts purely as a travel stop, so it will not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 850 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 SAIJ80AX850-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×850 | 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 SAIJ80AX850-30 Is Used
Long-Stroke Press Feed
Fine-tune the 820-850 mm retraction stop to synchronize long-stroke material feeding during machine commissioning.
Product Changeover Adjustment
Quickly dial the end position up to 30 mm to accommodate different product lengths on the line without changing hardware.
Extended Reach Ejection
Use the non-standard 850 mm travel to push parts out of a wide machine bed, adjusting the final position as needed.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX850-30 the Right Cylinder?
Choose this adjustable-stroke model when you need precise end-position tuning at machine setup without swapping the cylinder or adding external stops. If you need less force, the 63 mm bore offers 1402 N pull at 0.5 MPa. For heavier loads, the 100 mm bore provides 3681 N pull. Because this cylinder features an 850 mm stroke, the 25 mm rod and M20x1.5 thread will carry significant side load, but an external guide is highly recommended to prevent binding over such a long unsupported distance.
This SAIJ model is dimensionally interchangeable with ISO 15552 cylinders. It uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. It lacks a magnet for sensors, so position detection requires external switches. For load-holding without live pressure, consider an external rod lock or the AirTAC BSAI clamp-lock series instead of relying on the rear stopper.
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 SAIJ80AX850-30 FAQ
At 0.5 MPa, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the nominal 850 mm down to 820 mm. This creates a 30 mm tuning window for setting exact end positions without adding external stops.
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