Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-75
The AirTAC SAIJ40X150-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 75-150 mm usable travel window. Delivering 879 N of push force at 0.7 MPa, it uses a PT tapered G1/4 port and a 16 mm SUS304 stainless steel rod for corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This adjustable model lets you fine-tune end positions at commissioning without swapping the cylinder or adding external stops. The rear adjuster acts as a travel stop to set deceleration, not a lock, so it will not hold the load without live air pressure. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAIJ40BX150-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 SAIJ40BX150-75 Is Used
Product Changeovers
Dial in the 75-150 mm travel window during packaging format changes to accommodate different carton sizes without retooling the line.
Machine Setup
Fine-tune the retract end-position during commissioning to hit exact sensor targets, avoiding the need for external stopper blocks.
Variable End Stops
Use the rear screw to set precise deceleration points for assembly presses requiring adjustable stroke limits per batch.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-75 the Right Cylinder?
Choose this 40 mm bore if the 32 mm bore (402 N push at 0.5 MPa) is too weak, but the 50 mm bore (982 N at 0.5 MPa) is oversized. The 75 mm adjustment range is ideal for machines handling frequent product-size changeovers, providing variable end-stops without machining new hard stops. For load-holding without live air, select the SAIL or BSAI series instead, as this adjuster is not a brake.
When specifying a replacement, match the 40 mm bore, 150 mm stroke, 75 mm adjustment, PT G1/4 port, and your required mounting. Because the 16 mm rod thread carries moderate side loads, ensure proper guidance for this 150 mm stroke to prevent rod bending.
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 SAIJ40BX150-75 FAQ
This 40 mm bore cylinder provides 628 N of push force and 528 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster acts as a mechanical stop that shortens the 150 mm nominal stroke, creating a 75-150 mm usable travel window. It sets the end position but does not lock the load without live air.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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