Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-50 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 SAIJ40BX700-50
The AirTAC SAIJ40X700-50 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 650 to 700 mm, allowing you to dial back the end position by up to 50 mm without external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This SKU is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads with a G1/4 connection. The rear adjuster acts strictly as a mechanical stop to fine-tune deceleration, not as a lock, meaning it cannot hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-50 |
|---|---|
| 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 SAIJ40BX700-50
| 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 SAIJ40BX700-50 Is Used
Machine Changeover
Quickly fine-tune the 650-700mm travel window during product size changes without swapping the cylinder or adding physical spacers.
Variable End Stops
Ideal for diverter gates on conveyors where the exact retraction point of the 40mm bore needs occasional mechanical adjustment.
Setup Calibration
Allows operators to precisely set the end position during initial commissioning, absorbing mechanical tolerances in the fixture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-50 the Right Cylinder?
Choose this 40mm bore when an application requires moderate thrust, or step up to the 50mm bore if you need 1374N of push force at 0.7 MPa. The adjustable-stroke design is selected over a fixed SAI cylinder when commissioning requires variable end-stops or product changeovers. For load-holding without continuous air pressure, consider the SAIL or BSAI series instead of relying on the rear stopper.
Because this model features a 700mm stroke, the 16mm diameter rod and M12x1.25 thread require external guidance to prevent excessive side-loading and rod bending. It supports a speed range of 30-800 mm/s and is dimensionally interchangeable per ISO 15552. Available mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX700-50 FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster allows you to mechanically shorten the effective stroke within a 650 to 700 mm window. It acts as a travel stop to set the end position and does not lock the load without live air.
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