Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 180mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke180 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40
The AirTAC SAIJ40X180-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 180 mm travel by up to 40 mm. This creates a usable 140-180 mm end-position window, letting you fine-tune machine stops at commissioning without adding external bumpers. It delivers 879 N of push force at 0.7 MPa and 528 N of pull force at 0.5 MPa.
Built with a SUS304 stainless steel rod and PT tapered port threads, this unit carries higher side-load capacity and corrosion resistance than standard carbon steel variants. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is not equipped with a piston magnet, meaning position sensing via CMSE or DMSE switches is not supported without a model change.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 180 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×180 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX180-40 Is Used
Machine Setup Tuning
Dial in the exact 140-180 mm end position during commissioning to perfect a pressing or clamping operation without machining external stop spacers.
Product Changeover
Quickly shorten the effective stroke by up to 40 mm when a packaging line switches to a different product size, saving changeover time.
Adjustable Diverter
Adjust the retract distance of a conveyor sorting arm on the fly to accommodate varying package lengths without swapping cylinders.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX180-40 the Right Cylinder?
Choose this 40 mm bore when your application requires around 879 N of push force at 0.7 MPa; if you need less force, a 32 mm bore offers 563 N, while a 50 mm bore steps up to 1374 N. The 40 mm adjustment range is highly valuable for product changeovers on a production line, allowing the effective stroke to be shortened from 180 mm down to 140 mm simply by turning the rear screw. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series. This cylinder is dimensionally interchangeable with ISO 15552 mounting interfaces and supports a reduced mounting set including 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 SAIJ40 Adjustable Cylinder SAIJ40BX180-40 FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 739 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the retract stroke. For this model, it allows you to trim the 180 mm stroke back by up to 40 mm, giving a usable travel window of 140 to 180 mm.
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