Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10S
The AirTAC SAIJ40X55-10-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 45-55mm usable travel window, letting you trim the nominal 55mm stroke by up to 10mm during commissioning. This bore size delivers 628N of push force at 0.5 MPa, making it well-suited for moderate actuation tasks.
Built with a SUS304 stainless steel rod (option B) and PT tapered ports, this unit is highly resistant to corrosion. The extruded aluminum barrel includes sensor grooves on both sides, and the included magnet (-S) supports position monitoring via AirTAC CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a travel stop to fine-tune end positions without adding external stops.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAIJ40BX55-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SAIJ40BX55-10S Is Used
Machine Setup Tuning
Dial in the exact 45-55mm travel window during commissioning to perfectly time machine movements without external stopper blocks.
Product Changeover
Quickly adapt the end-stop position on packaging lines when handling slightly different package lengths.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable, moderate-force actuation in washdown or corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10S the Right Cylinder?
Choose this 40mm bore when you need precise end-position tuning without swapping cylinders; step up to a 50mm bore if your application requires 982N of push force at 0.5 MPa instead. The adjustable stroke is ideal for product changeovers where the exact end-of-stroke varies slightly.
This cylinder is dimensionally interchangeable per ISO 15552. To match this configuration, specify a 40mm bore, 55mm stroke, 10mm adjustment, PT port thread, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and a -S magnet. Note that the rear adjuster only sets the travel end and does not hold the load without live air; for true load-holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX55-10S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder generates 628N of push force and 528N of pull force. It can reach up to 1130N push force at 0.9 MPa.
The rear adjusting screw acts as a mechanical stop that allows you to shorten the effective stroke by up to 10mm. This creates a usable travel window of 45-55mm, enabling fine-tuning of the end position without replacing the cylinder.
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