Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 55mm 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
- Stroke55 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-30
The AirTAC SAIJ80X55-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 55 mm travel by up to 30 mm. This creates a precise 25-55 mm usable stroke window, perfect for dialing in exact end positions during commissioning without adding external stops. It delivers a robust 2513 N push force at 0.5 MPa and 4523 N at 0.9 MPa.
This unit features a SUS304 stainless steel rod for corrosion resistance and uses a PT tapered port thread. It includes variable air cushions at both ends to decelerate the load smoothly. The rear adjuster acts only as a mechanical stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 55 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 SAIJ80BX55-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×55 | 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 SAIJ80BX55-30 Is Used
Machine Changeover Tuning
Dial in the exact 25-55 mm end-stop during product size changes on a packaging line without swapping out the entire cylinder assembly.
Precision End-Positioning
Use the rear adjustment screw to fine-tune the retracted position of a forming tool, compensating for mechanical wear over time.
Adjustable Assembly Press
Leverage the 2513 N push force at 0.5 MPa for light pressing tasks while retaining the flexibility to shorten the stroke by up to 30 mm for different fixtures.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX55-30 the Right Cylinder?
Choose this 80 mm bore when you need heavy thrust beyond the 50 mm bore class (982 N at 0.5 MPa) but want to avoid the larger 100 mm class (3927 N at 0.5 MPa). The adjustable 25-55 mm travel window is ideal for machine setups requiring variable end-stops or fine-tuning during product changeover, replacing the need for a fixed-stroke SAI cylinder when exact positioning is not yet finalized.
As a dimensionally interchangeable ISO 15552 profile cylinder, it uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR mounts. It operates at speeds of 30-800 mm/s. Since this SKU lacks the -S magnet option, it cannot host CMSE reed or DMSE electronic sensors without modification.
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 SAIJ80BX55-30 FAQ
The rear adjuster screw allows you to mechanically shorten the stroke by up to 30 mm from the nominal 55 mm, providing a usable travel window of 25-55 mm. This stopper only sets the end position; it does not lock or hold the load without continuous air pressure.
At a 0.5 MPa operating pressure, the push force is 2513 N and the pull force is 2268 N. At 0.9 MPa, the push force increases to 4523 N.
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