Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75S
The AirTAC SAIJ40X80-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and provides a highly versatile usable travel window of 5-80mm, letting you dial back the 80mm nominal stroke by up to 75mm during commissioning.
This unit includes a SUS304 stainless steel rod for corrosion resistance and a magnet (-S) for CMSE reed or DMSE electronic sensors. It uses a PT tapered port and, like all SAIJ models, omits FB/CA/CB/CR mountings in favor of the Basic, FA, LB, TC, FTC, TCM1, and TCM2 set.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAIJ40BX80-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SAIJ40BX80-75S Is Used
Variable End-Stop Tuning
Dial in the exact 5-80mm end position during machine setup without adding external stops or swapping cylinders.
Product Changeover
Quickly adjust the travel window for different sized parts on the same line using the 75mm rear stroke adjuster.
Corrosive Assembly Tasks
Leverage the SUS304 stainless rod and 628N force for precise clamping in washdown or corrosive environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-75S the Right Cylinder?
Choose this 40mm bore when you need more power than the 32mm version (402N at 0.5 MPa) but want a smaller footprint than the 50mm bore (982N). The massive 75mm adjustment range is perfect for product-size changeovers on a line, acting as an external stop without requiring cylinder swaps. To replace an ISO 15552 cylinder, match the 80mm stroke, PT G1/4 port, and -S magnet.
Because the rear adjuster is a travel stop and not a lock, it will not hold a load without live air. For dead-air load holding, consider the SAIL or BSAI series instead. With an 80mm stroke, side-load is minimal, but always guide the load to protect the M12x1.25 rod thread.
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 SAIJ40BX80-75S FAQ
The rear adjuster acts as a mechanical stop, allowing you to shorten the 80mm nominal stroke by up to 75mm. This creates a usable travel window of 5-80mm, which is set at commissioning without changing the cylinder.
At 0.5 MPa, it provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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Standard models usually ship in 3-4 days.
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