Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20
The AirTAC SAIJ40X190-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 170-190 mm, allowing you to dial back the 190 mm nominal stroke by up to 20 mm during commissioning without adding external stops. It delivers 879 N of push force and 528 N of pull force at 0.7 MPa.
This unit uses a SUS304 stainless steel rod for superior corrosion resistance and is fitted with PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides. Remember the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 190 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 SAIJ40BX190-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×190 | 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 SAIJ40BX190-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 170-190 mm window during machine commissioning to perfect part ejection without physical spacers.
Product Changeover
Quickly adapt the stroke length on packaging lines when switching to a different product size, using the rear screw to set the new end stop.
Assembly Pressing
Leverage the 879 N push force at 0.7 MPa for light pressing tasks while retaining the flexibility to adjust the depth of travel as needed.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20 the Right Cylinder?
Choose this 40 mm bore when you need more thrust than the 32 mm version (which provides 563 N push at 0.7 MPa) but want a more compact footprint than the 50 mm option (1374 N push). The adjustable 170-190 mm travel window is ideal for product changeovers or fine-tuning end positions on the fly, saving the effort of swapping out a fixed-stroke SAI cylinder.
As an ISO 15552 dimensionally interchangeable cylinder, it matches standard mounting footprints using the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts (omitting FB, CA, CB, and CR). The 16 mm rod and M12x1.25 thread handle moderate side loads, but for any stroke over 300 mm, an external guide is recommended.
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 SAIJ40BX190-20 FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder generates 879 N of push force and 528 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 190 mm down to a minimum of 170 mm. This creates a 170-190 mm adjustable travel window for fine-tuning end positions without changing the cylinder.
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