Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 70mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S
The AirTAC SAIJ100X70-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you trim the nominal 70 mm travel back by up to 30 mm, creating a usable 40-70 mm end-position window for precise machine setup. It delivers substantial thrust, pushing with 7068 N and pulling with 3681 N at 0.9 MPa, making it well-suited for heavy-duty positioning tasks.
This variant is built with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnetic piston for position detection. The extruded aluminum barrel features sensor grooves on both sides, directly supporting AirTAC CMSE reed and DMSE electronic solid-state switches without requiring extra brackets.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX70-30S Is Used
Product Changeover
Dial in the 40-70 mm travel window on the fly to accommodate different package sizes on a packaging line without swapping out the entire cylinder assembly.
End-Position Tuning
Use the rear stopper screw to fine-tune the retract stroke during machine commissioning, ensuring exact clamping or positioning without external shims.
Heavy-Duty Forming
Leverage the 7068 N push force at 0.9 MPa for pressing or forming operations where the exact bottoming position varies slightly per material batch.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30S the Right Cylinder?
Choose this 100 mm bore cylinder when your application requires high force—delivering 5497 N push at 0.7 MPa—and demands variable end-stops for product changeovers. If you need less force, stepping down to an 80 mm bore yields 3518 N push at 0.7 MPa, whereas larger 125 mm bores provide 8590 N. The integrated rear screw allows you to fine-tune the retract position at commissioning without adding external stops, unlike a fixed-stroke SAI cylinder.
For ISO 15552 replacement matching, verify the 100 mm bore, 70 mm stroke, 30 mm adjustment range, PT tapered port threads, and the -S magnet option. Remember that the rear adjuster acts only as a travel stop and deceleration marker; it does not hold the load without live air. For true load-holding without continuous pressure, consider an AirTAC SAIL or BSAI lock cylinder. Since the stroke is under 300 mm, side-load risks are minimal, but external guides are still recommended for heavy lateral loads.
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 SAIJ100 Adjustable Cylinder SAIJ100BX70-30S FAQ
At 0.9 MPa operating pressure, this double-acting cylinder provides a push force of 7068 N and a pull force of 3681 N. It can deliver a maximum push force of 801 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the 70 mm nominal stroke by up to 30 mm, providing a usable travel range of 40 to 70 mm. This allows you to set the exact retract end-position during setup without changing the cylinder's physical mounting.
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