Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50 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 SAIJ40BX195-50
The AirTAC SAIJ40X195-50 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 195mm nominal stroke that can be dialed back by up to 50mm, creating a precise 145-195mm usable travel window for exact end-position tuning. The extruded aluminum barrel includes sensor grooves on both sides for straightforward switch mounting.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads with a G1/4 connection. The rear adjustment screw acts purely as a mechanical stop to define the retract position, working alongside the standard adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50 |
|---|---|
| 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 SAIJ40BX195-50
| 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 SAIJ40BX195-50 Is Used
Commissioning Calibration
Fine-tune the 145-195mm retract end-stop during initial machine setup to dial in exact positioning without machining external spacers.
Product Size Changeover
Quickly adjust the stroke by up to 50mm on packaging lines accommodating different product lengths, minimizing downtime between runs.
Assembly Station End-Stop
Set a precise mechanical stop for pressing or seating components, allowing the 628N thrust to consistently complete the operation.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50 the Right Cylinder?
Choose this 40mm bore when an application requires moderate force, such as the 628N push or 528N pull available at 0.5 MPa. If your setup demands less force, stepping down to a 32mm bore yields 402N; stepping up to a 50mm bore provides 982N. The adjustable stroke is selected over a fixed SAI cylinder when you need commissioning flexibility or variable end-stops during product changeovers without swapping hardware. To match this exact replacement, specify: 40mm bore, 195mm stroke, 50mm adjustment, PT port thread, SUS304 (B) rod, and no magnet. Since the stroke is under 300mm, side-load risks are manageable, but always guide the load externally to protect the 16mm rod thread.
Remember that neither the rear adjuster nor the air cushions will hold a load without continuous live air pressure. If your machine requires true load-holding capability in the event of air loss, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve. This SAIJ model supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ40BX195-50 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At a maximum 1.0 MPa, it can deliver up to 1130N of push force.
The rear adjuster screw allows you to shorten the 195mm nominal stroke by up to 50mm, providing an effective travel window of 145-195mm. It functions as a mechanical stop and does not lock the load without live air pressure.
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