Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20S 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 SAIJ100BX185-20S
The AirTAC SAIJ100X185-20-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you trim the 185 mm nominal travel back by up to 20 mm. This creates a 165-185 mm usable window to dial in end positions during commissioning without adding external stops. In the 100 mm bore class, it delivers 3927 N of push force at 0.5 MPa and 7068 N at 0.9 MPa.
This SKU features a SUS304 stainless steel rod for corrosion resistance and includes a magnet (-S) for AirTAC CMSE reed and DMSE electronic solid-state sensors. It uses a PT G1/2 port and relies on the standard SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear screw acts purely as a travel stop for deceleration, not a lock, so it will not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20S |
|---|---|
| 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 SAIJ100BX185-20S
| 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 SAIJ100BX185-20S Is Used
Machine Changeover
Dial in the 165-185 mm travel window during product size changes to set exact end-stops without physically swapping the cylinder.
Assembly Pressing
Leverage the 7068 N push force at 0.9 MPa and fine-tune the rear stopper to perfect the pressing depth of bearings or pins.
Diverting Mechanisms
Adjust the retract position on the fly to handle varying package sizes on a packaging line while tracking position with CMSE/DMSE sensors.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20S the Right Cylinder?
Choose this 100 mm bore if your application requires high thrust (3927 N push at 0.5 MPa) but needs finer end-position control than a fixed-stroke SAI offers. If you need less force, stepping down to an 80 mm bore provides 2513 N push at 0.5 MPa. Because the stroke is 185 mm, you should support the load with an external guide to prevent excessive side-loading on the M20x1.5 rod thread.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 185 mm stroke, 20 mm adjustment, PT G1/2 port, and the -S magnet. For load-holding without continuous air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead of relying on the SAIJ adjuster.
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 SAIJ100BX185-20S FAQ
At 0.5 MPa it 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 lets you shorten the 185 mm nominal stroke by up to 20 mm, providing a usable travel window of 165 to 185 mm for exact end-position tuning at commissioning.
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