Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-20 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 SAIJ80BX85-20
The AirTAC SAIJ80X85-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the effective travel. With an 85 mm nominal stroke and a 20 mm adjustment range, it provides a usable 65-85 mm travel window for precise end-position tuning at commissioning. It delivers a robust 2268 N pull force at 0.5 MPa, making it suitable for heavy handling tasks.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes dual sensor grooves for mounting CMSE reed or DMSE electronic switches if position feedback is later required. The rear adjuster acts purely as a mechanical stop to set deceleration and travel limits, not as a lock, so live air pressure is always needed to hold the load.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-20 |
|---|---|
| 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 SAIJ80BX85-20
| 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 SAIJ80BX85-20 Is Used
Machine Setup Changeover
Quickly fine-tune the retract end position during product size changeovers on a packaging line without disassembling the cylinder or adding external mechanical stops.
Variable End-Stop Positioning
Dial in the exact 65 to 85 mm travel window required for multi-stage forming operations, allowing operators to adjust the stroke limit directly at the rear of the actuator.
Corrosive Heavy Handling
Leverage the 2268 N pull force and SUS304 stainless steel rod to move heavy pallets or fixtures in humid or washdown manufacturing environments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-20 the Right Cylinder?
Choose this 80 mm bore when your application requires substantial force, such as the 2268 N pull at 0.5 MPa, but still needs the flexibility to trim the stroke on the fly during machine setup or product changeover. If your process requires less force, stepping down to a 63 mm bore yields 1402 N pull, whereas moving up to a 100 mm bore provides 3681 N. The adjustable rear stopper eliminates the need to swap cylinders or bolt on external stops when fine-tuning the retract position.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 85 mm stroke, 20 mm adjustment, PT G3/8 port, and the desired mounting style. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Because this unit lacks an -S magnet, it cannot host AirTAC sensors out of the box. For applications needing fail-safe load holding without continuous air pressure, consider the SAIL or BSAI series instead.
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 SAIJ80BX85-20 FAQ
At a standard 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force due to the single rod. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster is a mechanical stop that lets you shorten the 85 mm nominal stroke by up to 20 mm, creating a usable travel window of 65 to 85 mm. It sets the travel end and deceleration point but does not lock or hold the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ80 Adjustable Cylinder SAIJ80BX85-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.