Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX185-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 185mm 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
- Stroke185 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 SAIJ80BX185-20
The AirTAC SAIJ80X185-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 185 mm travel back by up to 20 mm, creating a precise 165-185 mm usable window. This on-machine tuning eliminates the need to swap cylinders or bolt on external stops during commissioning. Delivering 2268 N of pull force at 0.5 MPa, it is built with a SUS304 stainless steel rod for corrosion resistance and uses PT tapered ports.
The rear adjuster functions strictly as a mechanical stop to set the retraction end-position and works alongside the variable air cushions at both ends to decelerate the load. It does not hold the load without live air pressure; for true load-holding, an external rod lock or the AirTAC SAIL pneumatic lock version is required. This SAIJ model supports a focused mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 185 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 SAIJ80BX185-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×185 | 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 SAIJ80BX185-20 Is Used
Changeover Calibration
Dial in the exact 165-185 mm retraction point during machine format changeovers without replacing the cylinder or adding external shims.
Variable End-Stop Positioning
Set precise retract stops for machining operations where the raw material thickness varies slightly between production batches.
Assembly Press Tuning
Fine-tune the pressing depth on the fly during line commissioning to ensure perfect component seating without over-stroking.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX185-20 the Right Cylinder?
Selecting this 80 mm bore over a smaller 63 mm bore steps the thrust up significantly from 1402 N to 2268 N pull force at 0.5 MPa, making it suitable for heavier actuation demands. The adjustable stroke is chosen when a process requires fine end-position tuning during product changeovers, whereas a fixed-stroke SAI cylinder is preferred for static, repetitive cycles. Because this unit lacks the -S magnet option, it cannot host CMSE reed or DMSE electronic sensors for position feedback.
To replace an ISO 15552 cylinder with this SAIJ model, match the 80 mm bore, 185 mm stroke, 20 mm adjustment range, PT port threads, and the SUS304 (B) rod material. At an 185 mm stroke, the 25 mm rod diameter and M20x1.5 rod thread provide robust resistance to side loads, but any application with an unsupported load still requires an external guide rail to prevent rod binding.
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 SAIJ80BX185-20 FAQ
The maximum operating pressure is 1.0 MPa.
The rear adjuster screw allows you to shorten the nominal 185 mm stroke by up to 20 mm, providing a usable travel window of 165-185 mm. The adjuster acts as a mechanical stop to fine-tune the retract position and does not lock the load without continuous air pressure.
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