Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75 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 SAIJ40BX100-75
The AirTAC SAIJ40X100-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 100 mm travel by up to 75 mm. This creates a highly flexible 25-100 mm usable window, perfect for dialing in exact end positions during commissioning without adding external stops. It delivers 879 N of push force at 0.7 MPa and uses a G1/4 port.
This specific configuration features a SUS304 stainless steel rod (code B) for superior corrosion resistance in harsher environments. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75 |
|---|---|
| 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 SAIJ40BX100-75
| 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 SAIJ40BX100-75 Is Used
Machine Changeover
Quickly modify the 25-100 mm stroke window during product size transitions without disassembling the pneumatic setup.
End-Position Tuning
Fine-tune the retract end position at commissioning to achieve precise mechanical stops for delicate operations.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-75 the Right Cylinder?
Choose this 40 mm bore when you need more thrust than a 32 mm bore (which provides 563 N push at 0.7 MPa) but want a more compact footprint than the 63 mm option. The massive 75 mm adjustment range is ideal for product-size changeovers on a line, letting you modify the end-stop on the fly rather than swapping the entire cylinder for a fixed-stroke SAI variant. Remember that the adjuster is a stop, not a lock; for true load-holding without continuous air, select a SAIL or BSAI model.
To match this ISO 15552 cylinder exactly, specify a 40 mm bore, 100 mm nominal stroke, 75 mm adjustment range, PT tapered port thread, SUS304 stainless steel rod, and no magnet (-S omitted). The standard SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR 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 SAIJ40BX100-75 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 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 adjusting screw acts as a mechanical stopper that lets you shorten the effective travel from the nominal 100 mm down to 25 mm, creating a 25-100 mm usable window. It only sets the end position and does not lock the load without live air.
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