Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100S
The AirTAC SAIJ40X225-100-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a generous usable travel window of 125 to 225 mm, allowing you to dial back the 225 mm nominal stroke by up to 100 mm during commissioning. This bore delivers 628 N of pull force at 0.5 MPa and uses a SUS304 stainless steel rod for superior corrosion resistance.
The rear adjuster acts purely as a mechanical stop for end-position tuning and works alongside the standard air cushions to decelerate the load. It does not hold the load without live air pressure. This extruded aluminum profile cylinder includes a magnet for CMSE reed and DMSE electronic sensors, and features PT tapered port threads (G1/4) for a tight pneumatic seal.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAIJ40BX225-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SAIJ40BX225-100S Is Used
Product Changeover
Dial in the exact 125 to 225 mm stroke distance on the fly when switching between packaging sizes on a production line.
Commissioning Setup
Fine-tune the retract end-position at machine startup without machining new spacer blocks or swapping out the entire cylinder.
Variable End Stops
Use the 100 mm adjustment window to vary the travel distance for testing different sensor trigger points and ejection strokes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100S the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N of pull force at 0.5 MPa, stepping up from a 32 mm bore that offers 345 N. The 100 mm adjustment range is ideal for machines that undergo frequent product-size changeovers, as it allows you to shift the end-stop rapidly without swapping the cylinder or adding external stops. For fixed-stop applications without changeover needs, a standard SAI cylinder is a simpler alternative.
Because the stroke is 225 mm, the 16 mm rod and M12x1.25 thread should be paired with an external guide if the load imposes lateral stress. The rear adjuster is a travel stop, not a lock; for load-holding without live pressure, select an AirTAC SAIL or BSAI cylinder. This unit is dimensionally interchangeable with ISO 15552 cylinders, using a PT port, standard mounting, and a -S magnet.
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 SAIJ40BX225-100S FAQ
This 40 mm bore cylinder provides 628 N of pull force and 879 N of push force at 0.7 MPa. It operates efficiently at speeds between 30 and 800 mm/s.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke from 225 mm down to as little as 125 mm. It sets the travel end and aids deceleration, but it does not lock the load without live air pressure.
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