Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-30
The AirTAC SAIJ40X700-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 670-700mm usable travel window. Delivering 628N of push force at 0.5 MPa, it utilizes a SUS304 stainless steel rod for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
This model uses a PT tapered G1/4 port and provides variable air cushioning at both ends to decelerate the payload. The rear adjuster acts strictly as a mechanical stop for fine-tuning end positions during commissioning; it is not a locking device and will not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 700 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 SAIJ40BX700-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×700 | 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 SAIJ40BX700-30 Is Used
Variable End-Stop Tuning
Dial in the precise 670 to 700mm retract position during machine commissioning to accommodate new tooling heights without disassembling the pneumatic setup.
Product Size Changeover
Quickly adjust the stroke window on packaging lines to handle different carton lengths, ensuring consistent downstream indexing.
Assembly Press Fit
Fine-tune the insertion depth of a 628N press operation, using the rear stopper to guarantee precise mechanical endpoints for each cycle.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-30 the Right Cylinder?
Choose this 40mm bore when you need slightly more thrust than a 32mm cylinder (402N at 0.5 MPa) but want to avoid the bulk of a 50mm unit (982N). The 30mm adjustment range is ideal for dialing in exact end-stops during machine changeovers without swapping the cylinder or adding external physical stops. For load-holding requirements without continuous air pressure, consider the SAIL or BSAI series instead.
Because the 700mm stroke is substantial, the 16mm diameter rod and M12x1.25 thread can still experience deflection under heavy lateral loads; always use an external guide rail to prevent side-load damage. This SAIJ unit supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
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 SAIJ40BX700-30 FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. It operates at speeds between 30 and 800 mm/s, driven by its G1/4 port.
The rear mechanical screw allows you to shorten the effective travel from the 700mm nominal stroke down to 670mm. This stopper only sets the end position and does not lock the load without live air.
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