Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 50mm 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
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20S
The AirTAC SAIJ80X50-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N push force at 0.5MPa, utilizing a 25mm piston rod and G3/8 ports. Because this specific SKU carries the -20 adjustment code, its usable travel window spans 30 to 50mm, allowing you to dial back the nominal 50mm stroke by up to 20mm during commissioning. This variant includes a -S magnet for position sensing and uses a SUS304 stainless steel rod (code B) for superior corrosion resistance.
The rear adjuster functions strictly as a mechanical stop to fine-tune the retract end position without adding external stops; it does not lock or hold the load without live air. For load-holding requirements without continuous air pressure, consider the SAIL or BSAI series. This cylinder uses the standard SAIJ mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2) and operates at speeds between 30 and 800mm/s.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80BX50-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SAIJ80BX50-20S Is Used
Product Changeovers
Quickly adjust the 30-50mm travel window to accommodate different package sizes on a packaging line without swapping out the entire cylinder assembly.
Machine Setup
Fine-tune the end-of-stroke position during initial commissioning to achieve precise mechanical alignment, preventing the need for external shims.
High-Force Clamping
Leverage the 2513N push force at 0.5MPa for secure clamping of heavy workpieces, using the rear stopper to set the exact clamp depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20S the Right Cylinder?
Select this 80mm bore when an application requires high force (2513N push at 0.5MPa) within a compact 30 to 50mm travel window. If you need less force, stepping down to a 63mm bore yields 1559N; if you need more, a 100mm bore provides 3927N. The adjustable stroke is ideal for product changeovers or fine-tuning machine setup, whereas a fixed SAI cylinder is better for set-and-forget applications. When replacing an ISO 15552 cylinder, match the 80mm bore, 50mm nominal stroke, 20mm adjustment, G3/8 PT ports, and the -S magnet requirement.
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 SAIJ80BX50-20S FAQ
At 0.5MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. At 0.9MPa, the push force increases to 4523N.
The rear adjuster screw allows you to shorten the effective stroke by up to 20mm, creating a usable travel window of 30 to 50mm. The adjuster acts as a mechanical stop and does not hold the load without live air pressure.
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