Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30S 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 SAIJ80BX85-30S
The AirTAC SAIJ80X85-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 85 mm travel back by up to 30 mm. This yields a usable 55-85 mm window, allowing you to dial in the exact retract position during commissioning without swapping the unit or adding external stops. Built with a SUS304 stainless steel rod and a PT tapered port, it generates 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa.
The included magnet enables position sensing via CMSE reed or DMSE electronic solid-state switches seated in the dual-side barrel grooves. The rear adjuster functions strictly as a travel stop to set the end-of-stroke deceleration point alongside the standard air cushions; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30S |
|---|---|
| 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 SAIJ80BX85-30S
| 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 SAIJ80BX85-30S Is Used
Machine Changeover
Fine-tune the 55-85 mm retract position during product size or tooling changes without physically replacing the cylinder or adding shims.
Assembly End-Stop Tuning
Dial in the exact end-of-stroke contact point for delicate pressing or seating operations at machine setup, leveraging the 4523 N force at 0.9 MPa.
Variable Positioning Stops
Provide a flexible mechanical stop for automated lines where the required retraction distance varies between different workpiece heights.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-30S the Right Cylinder?
Choose this 80 mm bore when you need higher thrust than a 63 mm cylinder (which provides 1559 N at 0.5 MPa) but want to avoid the larger footprint of a 100 mm unit. The adjustable 55-85 mm travel window is ideal for product changeovers on a line where the retract end-position varies slightly between assemblies. Because the stroke is under 300 mm, side-load stress on the 25 mm rod and M20x1.5 thread is manageable without an external guide, though longer unsupported strokes would require one.
To match this ISO 15552 dimensionally interchangeable cylinder for a retrofit, specify: 80 mm bore, 85 mm stroke, 30 mm adjustment range, PT tapered ports, the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), and the -S magnet option. Remember that the adjuster is a stop, not a lock, so live air is required to maintain position against loads.
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 SAIJ80BX85-30S FAQ
The rear adjuster acts as an external stopper that shortens the effective stroke by up to 30 mm. This gives the 85 mm nominal stroke a usable travel window of 55-85 mm, allowing precise end-position tuning at commissioning without changing the cylinder.
The SAIJ80X85-30-S provides 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa. The pull force is 2268 N at 0.5 MPa. Note that the rear adjuster sets the travel end but does not lock or hold the load without continuous air pressure.
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