Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100
The AirTAC SAIJ40X290-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 290 mm travel back by up to 100 mm. This yields a highly flexible 190-290 mm usable stroke window, letting you dial in the exact end position during commissioning without swapping out the unit. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, fitting perfectly into medium-duty machinery setups.
This specific SKU is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance in humid or washdown environments. It uses PT tapered port threads (G1/4) and lacks a piston magnet, relying purely on mechanical travel stops. The extruded aluminum barrel incorporates sensor grooves on both sides for future upgrades, while the rear adjuster functions strictly as a travel stop that works with the end air cushions to decelerate the load, not as a lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 290 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 SAIJ40BX290-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×290 | 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 SAIJ40BX290-100 Is Used
Product Changeover Lines
Set variable end-stops rapidly when switching between different package lengths on a conveyor without changing the cylinder.
Commissioning Fine-Tuning
Dial in the exact 190-290 mm travel distance during machine setup to perfect the positioning of pushing or lifting mechanisms.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in packaging or food processing areas requiring washdowns.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100 the Right Cylinder?
Choose this 40 mm bore when an application requires more thrust than the 32 mm variant (which provides 402 N push at 0.5 MPa) but does not warrant the larger 50 mm bore (982 N push). The 100 mm adjustment range is particularly valuable for product size changeovers on a line, allowing operators to set variable end-stops on the fly instead of installing fixed spacers or buying a different fixed-stroke SAI cylinder.
Because the total stroke is 290 mm, you should ensure proper guiding for any heavy or off-center loads to prevent side-load damage to the M12x1.25 rod thread. Remember that this SAIJ model does not hold its position without live air pressure; the rear adjuster only sets the travel end. For static load-holding without continuous air, consider an external pilot-operated check valve or the SAIL locking series. This unit is dimensionally interchangeable with ISO 15552 mounting interfaces and supports the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting styles.
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 SAIJ40BX290-100 FAQ
It provides 628 N of push force and 528 N of pull force at 0.5 MPa, reaching up to 1130 N push at 0.9 MPa. The operational speed range is 30-800 mm/s.
A rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective travel from the nominal 290 mm down to as little as 190 mm. It works alongside the 30 mm air cushions to decelerate the load but does not lock the position without live air.
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