Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 900mm 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
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-50S
The AirTAC SAIJ80X900-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that dials back the effective travel by up to 50 mm. This creates an 850-900 mm usable stroke window, allowing you to fine-tune the retract end position at commissioning without adding external stops or swapping the barrel. It delivers a robust 4523 N push force at 0.9 MPa and uses a PT tapered port (G3/8) to match the 80 mm bore class.
This SKU ships with a SUS304 stainless steel rod (code B) for superior corrosion resistance and carries an -S magnet for position sensing. You can mount AirTAC CMSE reed or DMSE electronic solid-state switches directly into the extruded aluminum barrel's dual sensor grooves. The rear adjuster acts purely as a travel stop to set deceleration; it does not hold the load without live air, so use a SAIL or BSAI cylinder if your application requires fail-safe load holding.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 900 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 SAIJ80BX900-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×900 | 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 SAIJ80BX900-50S Is Used
Product Changeover Lines
Dial in the 850-900 mm retract position instantly when switching product sizes on a long-transfer conveyor, eliminating the need to physically swap out the cylinder.
Long-Stroke Assembly Presses
Leverage the 4523 N push force to drive long-travel pressing operations, using the rear screw to set the exact bottoming depth for each specific assembly run.
Commissioning Stroke Tuning
Fine-tune the end-of-travel stop during machine commissioning to compensate for mechanical tolerance stack-up across a 900 mm stroke without adding external stopper blocks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX900-50S the Right Cylinder?
Choose this 80 mm bore when a 50 mm bore falls short on thrust (delivering only 1767 N push at 0.9 MPa compared to 4523 N here), but step up to a 100 mm bore if you need 7068 N of force. The adjustable stroke is ideal for machine setups requiring a variable end-stop during product changeovers. Because the nominal stroke is 900 mm, the M20x1.5 rod thread and 25 mm rod diameter face potential side-loading forces; always pair this long stroke with an external guide rail to prevent rod binding.
For an exact ISO 15552 replacement match, specify: 80 mm bore, 900 mm stroke, 50 mm adjustment, PT G3/8 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting options, and the -S magnet. Note that SAIJ omits the FB, CA, CB, and CR mounts found on some standard cylinders.
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 SAIJ80BX900-50S FAQ
A rear external stopper screw lets you shorten the nominal 900 mm stroke by up to 50 mm, providing an adjustable travel window between 850 mm and 900 mm. The adjuster acts only as a travel stop and does not lock the load without continuous air pressure.
At 0.9 MPa operating pressure, this 80 mm bore cylinder generates 4523 N of push force and 4071 N of pull force (accounting for the 25 mm rod). It operates at speeds of 30-800 mm/s.
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