Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S 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 SAIJ100BX70-40S
The AirTAC SAIJ100X70-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to trim the effective travel down from 70 mm to a minimum of 30 mm. This 30-70 mm usable window is ideal for dialing in final end positions during commissioning without physically swapping the cylinder or adding external stops. It delivers substantial thrust, pushing 3927 N at 0.5 MPa and 7068 N at 0.9 MPa.
Built for durability and precise sensing, this variant features a SUS304 stainless steel piston rod (code B) and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet is fully compatible with AirTAC CMSE reed and DMSE solid-state switches. The rear adjuster acts purely as a travel stop to set deceleration, meaning it will not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S |
|---|---|
| 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 SAIJ100BX70-40S
| 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 SAIJ100BX70-40S Is Used
Product Changeover
Quickly adjust the 30-70 mm stroke window to accommodate different package sizes on a packaging line without changing out cylinder hardware.
End-Position Tuning
Fine-tune the final retract position during machine commissioning to achieve perfect mechanical alignment without adding external stopper blocks.
Variable Forming Stops
Set precise deceleration endpoints for high-force pressing or forming tasks, leveraging the 7068 N push force available at 0.9 MPa.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S the Right Cylinder?
Choose this 100 mm bore when your application requires high force, as it yields 3927 N of push force at 0.5 MPa. If you need less thrust, stepping down to an 80 mm bore provides 2513 N at the same pressure. The 40 mm adjustment range is highly valuable for machine setups requiring variable end-stops across different product sizes. Since the nominal stroke is 70 mm, you avoid the side-load risks associated with long unsupported strokes, though an external guide is always recommended for heavy radial loads.
For a drop-in ISO 15552 replacement, match the 100 mm bore, 70 mm nominal stroke, 40 mm adjustment range, PT port threads, and -S magnet. Remember that the SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR. If your setup requires true load-holding without continuous air pressure, this cylinder is not a lock; you should look at the SAIL or BSAI series instead.
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 SAIJ100BX70-40S FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster allows you to shorten the 70 mm nominal stroke by up to 40 mm, creating a usable travel window of 30-70 mm. The adjuster acts as a mechanical stop to set the end position and does not lock the load without live air.
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