Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40S
The AirTAC SAIJ80X85-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513 N push force at 0.5 MPa, utilizing a 25 mm piston rod and G3/8 port. The integrated -S magnet enables precise position detection with CMSE reed or DMSE electronic solid-state sensors housed in the dual-side barrel grooves.
This specific SKU provides an 85 mm nominal stroke that can be dialed back by up to 40 mm, creating a 45-85 mm usable travel window. It features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The rear screw stopper lets you fine-tune the retract end position during commissioning without adding external stops.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 85 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 SAIJ80BX85-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×85 | 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 SAIJ80BX85-40S Is Used
Product Changeovers
Dial in the 45-85 mm travel window instantly on the production line when switching between different package sizes, avoiding the need to physically swap cylinders.
Machining Fixtures
Leverage the 2513 N thrust at 0.5 MPa and the SUS304 stainless rod to clamp raw materials securely, making fine adjustments to the clamping depth during setup.
Sorting Diverters
Use the integrated -S magnet with DMSE electronic sensors to confirm stroke endpoints on sorting arms, adjusting the retract position to accommodate varying product widths.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-40S the Right Cylinder?
Choose this 80 mm bore when an application requires higher thrust than a 63 mm cylinder (which provides 1559 N at 0.5 MPa) but does not need the full 3927 N push force of a 100 mm unit. The 40 mm adjustment range is particularly useful for packaging lines or fixtures that undergo frequent product-size changeovers, allowing operators to dial in the exact end-stop mechanically rather than swapping out a fixed-stroke SAI cylinder.
For an exact ISO 15552 replacement match, verify the 80 mm bore, 85 mm stroke, 40 mm adjustment, PT port threads, SUS304 (B) rod material, and the -S magnet option. Note that the rear adjuster functions purely as a travel stop and does not lock the load; if position holding without live air pressure is required, consider an AirTAC SAIL or BSAI cylinder. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80BX85-40S 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 0.7 MPa, the push force increases to 3518 N.
The rear adjuster acts as a mechanical stop that trims the effective travel. For this SAIJ80X85-40-S model, the 85 mm nominal stroke can be reduced by up to 40 mm, resulting in a usable travel window of 45-85 mm. It is a travel stop, not a lock, and cannot hold the load without live air pressure.
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