Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 95mm 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
- Stroke95 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20
The AirTAC SAIJ40X95-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and provides a usable travel window of 75-95mm, letting you trim the nominal 95mm stroke by up to 20mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This variant is built with a SUS304 stainless steel rod (code B) for superior corrosion resistance and ships with PT tapered port threads. The rear adjuster acts strictly as a mechanical stop to fine-tune the retract end position without adding external stops, but it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 95 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 SAIJ40BX95-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×95 | 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 SAIJ40BX95-20 Is Used
Machine Setup Tuning
Dial in the exact retract position within the 75-95mm window during initial machine commissioning without swapping out the entire cylinder.
Product Changeover
Quickly adjust the end-stop by up to 20mm on packaging lines when running different product sizes, minimizing downtime between batches.
Corrosive Assembly Tasks
Leverage the SUS304 stainless steel rod for light assembly tasks in environments where moisture or mild chemicals would degrade standard carbon steel.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20 the Right Cylinder?
Select this 40mm bore cylinder when an application requires precise end-position tuning at commissioning or during product changeover, rather than relying on a fixed-stroke SAI cylinder. If your setup needs less force, stepping down to a 32mm bore yields 402N at 0.5MPa; stepping up to a 50mm bore provides 982N. Because this is a 95mm stroke, side-load risks are moderate, but always ensure proper external guiding for rigid loads.
For a true ISO 15552 replacement match, verify the 40mm bore, 95mm stroke, 20mm adjustment range, PT port thread, and SUS304 rod material. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. If load-holding without live air is required, use an external rod lock or pilot-operated check valve, as the rear adjuster is not a brake.
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 SAIJ40BX95-20 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder generates 628N of push force and 528N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from the nominal 95mm down to 75mm. It sets the travel end but does not lock or hold the load without continuous air pressure.
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