Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100 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 SAIJ40BX210-100
The AirTAC SAIJ40X210-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to shorten the effective travel by up to 100 mm. This creates a highly flexible 110-210 mm usable stroke window, letting you dial in the exact retract position during commissioning without swapping out the entire actuator. It delivers 628 N of pull force at 0.5 MPa and uses a SUS304 stainless steel rod for superior corrosion resistance.
Equipped with a PT tapered port and an M12x1.25 rod thread, this unit includes adjustable air cushions at both ends to manage kinetic energy. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not lock the load; for position holding without live air pressure, consider the SAIL or BSAI series. The extruded aluminum barrel integrates sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100 |
|---|---|
| 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 SAIJ40BX210-100
| 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 SAIJ40BX210-100 Is Used
Machine Changeover
Quickly adjust the retract end-position by up to 100 mm when switching between product sizes on the same production line, minimizing downtime.
Commissioning Calibration
Fine-tune the 110-210 mm travel window during initial setup to achieve exact positioning without fabricating custom external stoppers.
Variable End-Stop Assembly
Ideal for assembly stations where the effective stroke needs periodic adjustment to accommodate varying component heights or pressing depths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100 the Right Cylinder?
Choose this adjustable-stroke model when your application requires variable end-stops or frequent product changeovers, whereas a fixed-stroke SAI cylinder suits dedicated repetitive tasks. If your machine needs higher thrust, stepping up to the 50 mm bore yields 825 N of pull force at 0.5 MPa; conversely, dropping to a 32 mm bore reduces it to 345 N. Since the 210 mm stroke is relatively long, ensure you provide an external guide to support the load and prevent excessive side-loading on the rod.
To match this ISO 15552 interchangeable cylinder, specify a 40 mm bore, 210 mm nominal stroke, 100 mm adjustment range, PT port thread, and your required mounting accessories from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that SAIJ omits the FB, CA, CB, and CR mounts found on some other series.
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 SAIJ40BX210-100 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of pull force and 879 N of push force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster screw lets you mechanically shorten the stroke by up to 100 mm from the 210 mm nominal length, providing a 110-210 mm travel window. It functions as a travel stop and does not hold the load without air pressure.
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