Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-75S
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX425-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 425mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke425 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-75S
It features a durable SUS304 stainless steel rod and PT tapered ports. By integrating a rear mechanical stopper, this actuator allows you to dial back the nominal 425mm stroke by up to 75mm, creating a precise 350-425mm usable travel window for exact end-position tuning.
Because the adjustment is handled internally at the retract end, you can fine-tune the machine stroke during commissioning or product changeovers without swapping the cylinder or adding bulky external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the built-in magnet supports AirTAC CMSE reed and DMSE electronic solid-state switches for direct position feedback.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-75S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 425 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×425 | 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 SAIJ80BX425-75S Is Used
Product Changeover
Quickly dial the stroke back from 425mm down to 350mm via the rear adjuster when switching a packaging line to a different carton size, eliminating the need to physically swap out actuators.
End-Position Tuning
Fine-tune the exact retract distance during machine commissioning to perfect a pressing or forming operation, absorbing mechanical tolerances without adding external stop blocks.
Variable End Stops
Ideal for automated assembly stations where the rear stop point needs occasional adjustment to accommodate different fixture heights within the 350-425mm travel window.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX425-75S the Right Cylinder?
The adjustable 75mm trim is ideal for setups requiring variable end-stops across different product sizes, offering flexibility that a fixed-stroke SAI cannot match. For a direct ISO 15552 replacement, match the 80mm bore, 425mm stroke, 75mm adjustment, PT ports, SUS304 rod, and the -S magnet.
With a 425mm stroke, the M20x1.5 rod thread and 25mm rod diameter provide robust resistance to side loads, though an external guide is still recommended for long unsupported loads. Remember that the rear adjuster functions strictly as a travel stop to set deceleration, not as a locking device; this SAIJ cylinder will not hold a load without live air pressure, so consider an AirTAC SAIL or BSAI for fail-safe load holding.
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 SAIJ80BX425-75S FAQ
At the maximum 1.0MPa pressure, it can deliver up to 513kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 425mm nominal stroke down to a minimum of 350mm. This allows precise end-position tuning without changing the cylinder, though it only sets the travel end and does not lock the load without air pressure.
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Covers non-human-caused product damage.
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