Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-30S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-30S
The AirTAC SAIJ100X185-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 3927 N of push force at 0.5 MPa and features a 25 mm SUS304 stainless steel piston rod (code B) with an M20x1.5 thread. The built-in rear stopper allows you to trim the 185 mm nominal stroke back by up to 30 mm, creating a precise 155-185 mm usable travel window for commissioning without external stops.
This adjustable-stroke model includes a magnet for position sensing, supporting AirTAC CMSE reed and DMSE solid-state switches in the dual-side sensor grooves. It uses a PT tapered G1/2 port and shares the standard extruded aluminum barrel, while omitting the FB, CA, CB, and CR mountings found on some fixed-stroke variants. The rear adjuster acts strictly as a travel stop and does not hold the load without live air.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-30S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 185 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 SAIJ100BX185-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×185 | 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 SAIJ100BX185-30S Is Used
Product Changeover
Dial in the 155-185 mm travel window during format changes to accommodate different product lengths without physically swapping the cylinder.
End-Stop Tuning
Fine-tune the retract position at machine commissioning using the rear screw, eliminating the need to bolt on external mechanical stops.
Heavy Forming
Leverage the 3927 N push force at 0.5 MPa for pressing and forming tasks while adjusting the stroke to prevent over-travel.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-30S the Right Cylinder?
Select this 100 mm bore cylinder when an application requires heavy thrust—such as the 5497 N push force at 0.7 MPa—combined with on-the-fly end-position tuning. If your force needs are lower, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa. Choose this adjustable SAIJ over a fixed SAI when you need a variable end-stop for product changeovers, rather than swapping the entire cylinder. To replace this ISO 15552 cylinder, match the 100 mm bore, 185 mm stroke, 30 mm adjuster, PT G1/2 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and the -S magnet.
Because the 185 mm stroke is relatively long for this bore size, ensure external guiding to prevent side-load damage to the M20x1.5 rod. Remember that the rear adjuster and air cushions only set the travel end; for true load-holding without live pressure, specify a SAIL or BSAI cylinder.
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 SAIJ100BX185-30S FAQ
At 0.5 MPa, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjuster acts as a mechanical stop that lets you shorten the 185 mm nominal stroke by up to 30 mm, providing a usable travel window of 155-185 mm. It only sets the end position and does not lock the load without live air.
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