Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-75S
The AirTAC SAIJ40X155-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 879N of push force at 0.7 MPa and provides a usable travel window of 80 to 155mm, letting you dial back the nominal stroke by up to 75mm during machine commissioning.
Equipped with a SUS304 stainless steel rod and a PT tapered port, this unit integrates seamlessly with existing setups. The integrated magnet (-S) supports CMSE reed and DMSE electronic sensors housed in the dual-side barrel grooves. It uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and relies on adjustable air cushions at both ends to decelerate the load.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 155 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 SAIJ40BX155-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×155 | 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 SAIJ40BX155-75S Is Used
Variable End-Stop Tuning
Dial in the exact 80 to 155mm travel distance during machine commissioning to accommodate varying material thicknesses without physical hardware changes.
Product Size Changeover
Quickly adapt a conveyor sorting mechanism to new package dimensions by turning the rear adjuster screw, minimizing production line downtime.
Gauge Positioning Setup
Fine-tune the retraction end-point on a stainless steel rod actuator to perfectly seat delicate components before final processing.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-75S the Right Cylinder?
Choose this 40mm bore when an application requires precise end-position tuning without adding external stops or swapping cylinders. The generous 75mm adjustment window is perfect for product changeovers on a packaging line. If your setup needs less than 879N of force at 0.7 MPa, stepping down to a 32mm bore yields 563N; conversely, a 50mm bore offers 1374N for heavier payloads.
Because the rear adjuster functions strictly as a mechanical stop and the air cushions manage deceleration, neither will hold a load without continuous live air pressure. For drop-prevention or load-holding requirements, consider the SAIL or BSAI series instead. To replace an ISO 15552 cylinder, match the 40mm bore, 155mm stroke, PT G1/4 port, and -S 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 SAIJ40BX155-75S FAQ
At 0.7 MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 528N of pull force. It can deliver up to 1130N push force at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 155mm nominal stroke down to 80mm. It sets the end position but does not lock the load without live air pressure.
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