Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-50 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 SAIJ40BX100-50
The AirTAC SAIJ40X100-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a 628N push force at 0.5 MPa. It features a SUS304 stainless steel rod and PT tapered port threads. The integrated rear stopper allows you to trim the nominal 100mm stroke back by up to 50mm, creating a highly versatile 50-100mm usable travel window for precise commissioning.
This adjustable stopper lets you fine-tune end positions during product changeovers without swapping the cylinder or adding external stops. It uses a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Remember that the adjuster acts only as a travel stop; it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-50 |
|---|---|
| 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 SAIJ40BX100-50
| 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 SAIJ40BX100-50 Is Used
Machine Setup & Changeover
Dial in the exact 50-100mm end-position during product size changeovers without machining new hard stops.
Variable End-Stop Positioning
Fine-tune the retract distance on the fly to accommodate varying material thicknesses or part dimensions.
Commissioning Calibration
Trim the 100mm nominal stroke back by up to 50mm to perfectly sync timing with downstream equipment.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-50 the Right Cylinder?
Choose this 40mm bore if you need a 50-100mm travel window and 628N of thrust at 0.5 MPa. Stepping down to a 32mm bore drops thrust to 402N, while stepping up to a 50mm bore increases it to 982N. The 16mm rod with an M12x1.25 thread handles moderate side loads well, but for any stroke over 300mm, you should use an external guide.
Select an adjustable SAIJ over a fixed SAI when a machine requires variable end-stops for different product sizes. Because the rear adjuster is not a lock, use a SAIL or BSAI cylinder if your application requires load-holding without live air pressure. This model uses PT tapered ports and has no magnet installed.
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 SAIJ40BX100-50 FAQ
A rear external screw acts as a stopper, allowing you to shorten the 100mm nominal stroke by up to 50mm. This creates a 50-100mm usable travel window for fine-tuning end positions without replacing the cylinder.
This 40mm bore double-acting cylinder delivers 628N of push force and 528N of pull force at 0.5 MPa, scaling up to 1130N of push force at 0.9 MPa.
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