Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S
The 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ100 mm
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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 | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | — |
| Max (@1.0 MPa) | 751 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. 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.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-40S the Right Cylinder?
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 direct 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 0.9 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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