Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40 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 SAIJ40BX700-40
The AirTAC SAIJ40X700-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel anywhere in a 660 to 700 mm window. Delivering 628 N of push force at 0.5 MPa, it utilizes a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread for a robust pneumatic seal.
Because this 700 mm stroke exceeds typical unsupported lengths, the 16 mm rod diameter should be paired with an external guide to prevent excessive side-loading. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE or DMSE switches if a magnet is added later.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40 |
|---|---|
| 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 SAIJ40BX700-40
| 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 SAIJ40BX700-40 Is Used
Variable End Stops
Dial in the precise 660 to 700 mm end position during machine commissioning to accommodate different product sizes without mechanical rebuilds.
Product Changeover
Quickly adjust the retract stop on packaging lines when switching between box formats, saving downtime and eliminating the need for secondary stop blocks.
Long-Stroke Positioning
Use the 700 mm travel to push parts across a work cell, relying on the fine-tune adjuster to absorb minor variations in final placement distance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX700-40 the Right Cylinder?
Choose this 40 mm bore when you need more thrust than a 32 mm bore provides (402 N at 0.5 MPa) but want to avoid the larger footprint of a 50 mm cylinder (982 N at 0.5 MPa). The 40 mm adjustment range is ideal for product changeovers on a line, allowing you to dial in the exact end position without swapping cylinders or adding external stops. Remember that the rear adjuster is a travel stop, not a lock; for load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 footprint exactly, specify a 40 mm bore, 700 mm stroke, 40 mm adjustment, PT port, and SUS304 (B) rod material.
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 SAIJ40BX700-40 FAQ
A rear-mounted external screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 40 mm. This creates a usable travel window of 660 to 700 mm, which can be fine-tuned during commissioning without changing the cylinder.
At a standard operating pressure of 0.5 MPa, the SAIJ40X700-40 provides 628 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
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