Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50S 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 SAIJ40BX195-50S
The AirTAC SAIJ40X195-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical stopper, allowing you to dial back the nominal 195 mm stroke by up to 50 mm. This creates a flexible 145 to 195 mm usable travel window, which is ideal for fine-tuning end positions during machine commissioning or product changeovers without swapping out the physical actuator. Delivering 628 N of push force at 0.5 MPa, it bridges the gap between smaller 32 mm bores and mid-sized 50 mm units.
This specific SKU features a SUS304 stainless steel piston rod (option B) for superior corrosion resistance in washdown or chemically active environments. The integrated magnet (-S) makes it fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors, which seat directly into the dual-side extruded barrel grooves. It uses a PT tapered G1/4 port and includes variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50S |
|---|---|
| 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 SAIJ40BX195-50S
| 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 SAIJ40BX195-50S Is Used
Machine Commissioning
Dial in the exact 145 to 195 mm end-position during setup without machining custom spacers or replacing the actuator.
Product Changeover
Quickly adjust the stroke stop on packaging lines when switching between different carton sizes or package widths.
Corrosive Positioning
Leverage the SUS304 rod for light-duty positioning tasks in food processing or chemical areas requiring high rust resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-50S the Right Cylinder?
Select this 40 mm bore when an application requires more thrust than a 32 mm cylinder (402 N at 0.5 MPa) but lacks the physical envelope for a 50 mm unit (982 N at 0.5 MPa). The 50 mm rear adjustment range is the primary draw here: it allows operators to set variable end-stops on the fly, a major advantage over a fixed-stroke SAI cylinder when accommodating multiple product sizes on the same conveyor line. Because the total stroke is under 300 mm, side-load stress on the 16 mm rod is manageable without an external guide, though long unsupported loads should still be guided.
For ISO 15552 dimension interchangeability, match the 40 mm bore, 195 mm stroke, 50 mm adjustment range, PT G1/4 port, and the -S magnet requirement. The SAIJ mounting set is restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets. Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air; for true fail-safe load holding, consider an SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ40BX195-50S FAQ
At 0.5 MPa it provides 628 N push and 528 N pull force, reaching 1130 N push at 0.9 MPa. The standard operating speed range for this 40 mm bore is 30-800 mm/s, dependent on your valve flow and load.
A rear screw stopper lets you mechanically shorten the 195 mm stroke down to a minimum of 145 mm. This creates a 50 mm adjustable travel window for end-position tuning, but it functions only as a stop and does not lock the load without continuous air pressure.
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