Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 950mm 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
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-20S
The AirTAC SAIJ80X950-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within a 930-950 mm window. It delivers robust thrust, pushing 2513 N and pulling 2268 N at 0.5 MPa. This variant includes a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and a built-in magnet for use with CMSE reed or DMSE electronic sensors.
Because the nominal 950 mm stroke approaches the maximum standard stroke limit for this bore, the external adjuster provides critical leeway to dial in exact end positions during machine commissioning without adding external stops. The rear screw acts purely as a travel stop and does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 950 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 SAIJ80AX950-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×950 | 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 SAIJ80AX950-20S Is Used
Long-Stroke Component Placement
Dial in the 930-950 mm travel window to precisely seat large parts or assemblies on extended transfer lines, ensuring perfect alignment without external shims.
Machine Setup Tuning
Use the rear stopper screw to fine-tune the retract end position during initial commissioning, absorbing mechanical tolerances over long 950 mm travels.
Product Size Changeover
Quickly adjust the effective stroke by up to 20 mm when switching between product variants on automated machinery, reducing setup downtime.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX950-20S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore falls short (offering only 982 N push at 0.5 MPa) but you want to avoid stepping up to a 100 mm bore that yields 3927 N. The adjustable stroke is ideal for product changeovers where the exact end-of-stroke position needs slight variation. It uses a PT tapered G3/8 port and supports the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR.
Given the 950 mm stroke, the M20x1.5 rod thread and 25 mm rod diameter provide rigidity, but an external guide is highly recommended to prevent excessive side-load wear on the seals. To replace an ISO 15552 cylinder, match the 80 mm bore, 950 mm stroke, 20 mm adjustment, PT port, and -S magnet.
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 SAIJ80AX950-20S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides a push force of 2513 N and a pull force of 2268 N. At the maximum 1.0 MPa pressure, it achieves a push force of 4523 N.
The rear adjuster screw allows you to shorten the nominal 950 mm stroke by up to 20 mm, creating a usable travel window of 930-950 mm. The adjuster acts as a mechanical stop to set the end position and does not function as a lock or brake.
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