Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-30S 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 SAIJ40BX190-30S
The AirTAC SAIJ40X190-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, utilizing a 16mm rod with an M12x1.25 thread. The built-in adjustment mechanism allows you to dial back the nominal 190mm stroke by up to 30mm, creating a precise 160-190mm usable travel window for fine-tuning end positions during commissioning.
This specific configuration includes a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads (G1/4). Equipped with a standard magnet, it is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors that mount directly into the dual-side extruded aluminum barrel grooves. The rear adjuster acts strictly as a travel stop to set deceleration, meaning it will not hold a load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-30S |
|---|---|
| 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 SAIJ40BX190-30S
| 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 SAIJ40BX190-30S Is Used
Machine Changeover
Dial in the exact 160-190mm end-stop during product size transitions without swapping hardware.
Variable End-Positioning
Fine-tune the rear travel limit at commissioning to absorb mechanical tolerances in the fixture.
Corrosive Assembly Lines
Leverage the SUS304 stainless rod for reliable actuation in washdown or mildly corrosive settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-30S the Right Cylinder?
Select this adjustable-stroke model when your machine setup requires variable end-stops or frequent product-size changeovers without physically swapping out the cylinder or adding bulky external stops. If your application demands greater thrust, stepping up to the 50mm bore yields 982N of push force at 0.5 MPa, while dropping to a 32mm bore reduces it to 402N. Remember that the rear screw and air cushions only manage travel endpoints; for true load-holding without live air, explore the SAIL pneumatic lock or BSAI clamp-lock series.
When replacing an ISO 15552 cylinder, match these exact parameters: 40mm bore, 190mm nominal stroke, 30mm adjustment range, PT G1/4 ports, and the -S magnet option. Because the 190mm stroke approaches the mid-range of standard lengths, ensure your mounting choice—limited to the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR)—adequately supports the load to prevent rod side-loading.
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 SAIJ40BX190-30S FAQ
The rear adjuster screw acts as an external mechanical stop, allowing you to shorten the effective travel from the nominal 190mm down to a minimum of 160mm. This provides a 30mm tuning window to fine-tune the retract end position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, the push force increases to 1130N.
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