Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-30S 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 SAIJ40BX195-30S
The AirTAC SAIJ40X195-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 165-195 mm usable travel window, allowing you to dial back the nominal 195 mm stroke by up to 30 mm during commissioning. Delivering 879 N of push force at 0.7 MPa, it bridges the gap between compact 32 mm bores and heavier 50 mm units.
This specific configuration includes a SUS304 stainless steel rod (code B) for superior corrosion resistance and PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet supports position detection via AirTAC CMSE reed and DMSE electronic solid-state switches.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-30S |
|---|---|
| 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 SAIJ40BX195-30S
| 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 SAIJ40BX195-30S Is Used
Machine Changeover
Quickly dial in the 165-195 mm stroke window during product size transitions on a packaging line without swapping out the entire cylinder.
Variable End-Stop Tuning
Fine-tune the retract end-position at commissioning to perfect sensor timing and mechanical alignment without adding external stops.
Corrosive Assembly Tasks
Leverage the SUS304 stainless steel rod for light assembly duties in environments where moisture or washdowns would degrade standard carbon steel.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-30S the Right Cylinder?
Select this 40 mm bore when an application requires 879 N push force at 0.7 MPa but cannot justify the 1374 N output of a 50 mm unit. Choose the adjustable-stroke SAIJ over a fixed SAI when a machine requires variable end-stops for rapid product changeovers, eliminating the need to physically swap cylinders or bolt on external stops. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
To match this exact ISO 15552 replacement, specify the 40 mm bore, 195 mm stroke, 30 mm adjustment range, PT port threads, SUS304 (B) rod material, and the -S magnet option. Note that the rear adjuster acts purely as a travel stop and does not hold the load without live air; for fail-safe load holding, consider the SAIL or BSAI series. The 16 mm rod and M12x1.25 thread provide good side-load capacity, but long unsupported strokes still require an external guide.
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 SAIJ40BX195-30S 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 deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the 195 mm nominal stroke down to 165 mm, creating a 30 mm tuning window. This stopper only sets the travel end and decelerates the load; it does not lock or hold the load without continuous air pressure.
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