Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-20S
The AirTAC SAIJ40X210-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 190 to 210 mm, enabling precise end-position tuning at commissioning without swapping out the physical cylinder. The 40 mm bore generates 628 N of push force and 528 N of pull force at 0.5 MPa, fitting it for moderate actuation tasks.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance and ships with a magnet for CMSE reed or DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the rear adjuster functions purely as a travel stop for deceleration rather than a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 210 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 SAIJ40BX210-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×210 | 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 SAIJ40BX210-20S Is Used
End-Position Tuning
Dial in the exact 190 to 210 mm retract position during machine commissioning without adding external mechanical stops.
Product Changeover
Quickly adapt the travel end for varying package sizes on a conveyor line by turning the rear adjustment screw.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in packaging or food processing areas with washdowns.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-20S the Right Cylinder?
Select this 40 mm bore adjustable cylinder when your setup requires variable end-stops or product-size changeovers on a line, stepping down from a 50 mm bore that yields 982 N push force at 0.5 MPa if your application is overpowered. To replace this unit, match the 40 mm bore, 210 mm stroke, 20 mm adjustment, PT tapered port threads, SUS304 rod, and the -S magnet. The mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
Because the 210 mm stroke exceeds 200 mm, ensure you use an external guide to prevent side-load damage to the 16 mm rod and M12x1.25 rod thread. Remember that the rear adjuster and air cushions only set the travel end; they do not hold the load without live air pressure, so consider an SAIL or BSAI cylinder if true fail-safe locking is required.
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 SAIJ40BX210-20S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach 1130 N of push force at 0.9 MPa.
The rear adjuster acts as a stopper that lets you shorten the 210 mm nominal stroke by up to 20 mm, creating a 190 to 210 mm usable travel window. It only sets the end position and does not lock the load without continuous air pressure.
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Covers non-human-caused product damage.
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