Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-100
The AirTAC SAIJ40X300-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel anywhere within a 200 to 300 mm window. This fine-tuning capability is ideal for dialing in exact end positions during commissioning without swapping hardware. At 0.7 MPa, it delivers 879 N of push force and 528 N of pull force.
This specific configuration includes a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides, ready to accept AirTAC CMSE reed or DMSE electronic switches if a magnet is added later. Mounting options are restricted to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 SAIJ40BX300-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 SAIJ40BX300-100 Is Used
Product Changeovers
Rapidly reconfigure retract end positions for varying package sizes on a packaging line using the 100 mm adjustment range.
Machine Commissioning
Fine-tune the 300 mm travel window during setup to dial in exact stopping points without machining external stop blocks.
Diverting Mechanisms
Adjust the stroke length on the fly to accommodate different product widths moving down a material handling conveyor.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-100 the Right Cylinder?
Choose this 40 mm bore when an application requires more power than a 32 mm cylinder (which provides only 563 N push at 0.7 MPa) but less bulk than a 50 mm option. The generous 100 mm adjustment range is perfect for product changeovers on a packaging line, letting operators set new retract stops rapidly. Because the 300 mm stroke is relatively long, ensure adequate external guiding to prevent excessive side-loading on the SUS304 rod.
The rear adjuster functions strictly as a travel stop and works alongside the standard air cushions to decelerate the load, but it cannot hold position without continuous live air. For dead-air load holding, select an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead. To match this ISO 15552 interchangeable cylinder exactly, specify a 40 mm bore, 300 mm stroke, 100 mm adjustment, PT port thread, SUS304 rod, and no magnet.
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 SAIJ40BX300-100 FAQ
At a standard operating pressure of 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster acts as an external stop that lets you shorten the nominal 300 mm stroke by up to 100 mm, providing a usable travel window of 200 to 300 mm. It sets the end position but does not lock the load without live air pressure.
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