Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20
The AirTAC SAIJ40X100-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 100 mm stroke that can be fine-tuned backward by up to 20 mm, creating a precise 80-100 mm usable travel window. Delivering 628 N of push force at 0.5 MPa, it bridges the gap between smaller 32 mm bores and mid-sized 50 mm units.
This SKU is built with a SUS304 stainless steel rod for superior corrosion resistance and ships with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE or DMSE switches if a magnet is added later. Mounting options cover Basic, FA, LB, TC, FTC, TCM1, and TCM2 footprints.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 SAIJ40BX100-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SAIJ40BX100-20 Is Used
Product Changeovers
Dial in the 80-100 mm stroke window during format changes on a packaging line without replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract end-stop during commissioning to perfect the resting position of tooling, compensating for mechanical tolerance stack-up.
Variable Diverter Stops
Adjust the stroke length on the fly for conveyor diverters handling different package sizes, ensuring gentle contact without reprogramming the motion controller.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20 the Right Cylinder?
Select this 40 mm bore when an application requires 628 N push force at 0.5 MPa but does not justify the 982 N output of a 50 mm cylinder. The adjustable 80-100 mm travel window is ideal for machine setups requiring variable end-stops or product changeovers, eliminating the need to physically swap cylinders or bolt on external stoppers. To match this ISO 15552 replacement exactly, confirm the 100 mm stroke, 20 mm adjustment, PT ports, SUS304 rod, and required mounting kit.
Because the rear screw acts purely as a travel stop and the air cushions only manage deceleration, neither component will hold a load without live air pressure. If your setup requires true load-holding, consider an external pilot-operated check valve or explore AirTAC SAIL or BSAI locking cylinders instead.
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 SAIJ40BX100-20 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder produces 628 N of push force and 528 N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the 100 mm nominal stroke down to as little as 80 mm. This provides a 20 mm tuning window to set precise end-positions without altering the cylinder mounting.
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