Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 195mm 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
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-40
The AirTAC SAIJ40X195-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear mechanical adjuster that trims the effective stroke. With a 195mm nominal stroke and a 40mm adjustment range, you can dial in the retract end-position anywhere within a 155-195mm usable travel window during commissioning. This bore size delivers 879N of push force at 0.7 MPa, making it robust enough for moderate industrial handling.
This SKU is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic switches later if positioning feedback becomes necessary. The rear stopper relies on the cylinder's internal air cushions for end-of-stroke deceleration but acts only as a travel stop, not a load lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 195 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 SAIJ40BX195-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×195 | 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 SAIJ40BX195-40 Is Used
Variable End-Stop Positioning
Ideal for packaging machinery where the retract distance needs frequent fine-tuning across a 155-195mm window to accommodate different carton depths without changing the cylinder.
Machine Changeover Setup
Speeds up product line changeovers by allowing operators to mechanically dial in the new stroke end-position via the rear screw rather than reprogramming the entire PLC logic.
Corrosive Environment Handling
The SUS304 stainless steel rod makes this configuration well-suited for food processing or light washdown environments where standard carbon steel rods would pit or degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-40 the Right Cylinder?
Select this 40mm bore cylinder when an application requires exact end-position tuning without swapping out physical components; it bridges the gap between the lighter 32mm bore (563N push at 0.7 MPa) and the heavier 50mm bore (1374N push at 0.7 MPa). The 40mm adjustment range is particularly useful on lines running multiple product sizes, allowing operators to reposition the retract stop quickly. Because the nominal stroke is under 300mm, side-load risks are manageable, though the 16mm rod diameter still requires external guiding for heavy lateral loads.
When specifying a replacement, ensure you match the 195mm stroke, 40mm adjuster code, PT port threads, and the SUS304 rod material. Remember that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on some fixed-stroke variants. If your process requires the load to be held securely without continuous live air pressure, you must integrate an external pilot-operated check valve or switch to an AirTAC SAIL or BSAI locking cylinder, as the SAIJ adjuster cannot hold loads.
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 SAIJ40BX195-40 FAQ
At a standard operating pressure of 0.7 MPa, the 40mm bore provides 879N of push force and 739N of pull force. It can deliver up to 1130N of push force at its maximum rated pressure of 0.9 MPa.
The rear adjuster screw allows you to shorten the 195mm nominal stroke by up to 40mm, creating a usable travel window of 155-195mm. This lets you set the exact retract end-position mechanically during installation without needing external stops.
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