Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-40S 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 SAIJ100BX185-40S
The AirTAC SAIJ100X185-40-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 145-185 mm usable travel window, letting you dial back the nominal 185 mm stroke by up to 40 mm during commissioning. Delivering 3927 N of push force at 0.5 MPa, it handles substantial loads with precision. The SUS304 stainless steel rod offers superior corrosion resistance, while the integrated magnet supports CMSE reed and DMSE electronic sensors.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions. The rear adjuster acts purely as a travel stop to set the retraction point, not as a lock, meaning live air is required to hold the load. It uses a G1/2 port and includes variable air cushions at both ends to decelerate heavy moving masses smoothly.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-40S |
|---|---|
| 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 SAIJ100BX185-40S
| 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 SAIJ100BX185-40S Is Used
Machine Setup & Changeover
Fine-tune the 145-185 mm retraction point during product size changeovers without physically swapping out the entire cylinder.
Variable End-Stop Positioning
Dial in the exact end-of-stroke position during commissioning using the rear adjuster, perfect for precise clamping or pressing tasks.
Heavy-Duty Forming
Leverage the 3927 N push force at 0.5 MPa for robust forming operations, using the adjustable stop to vary the working depth.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-40S the Right Cylinder?
Choose this 100 mm bore when a smaller 80 mm cylinder lacks thrust; an 80 mm bore yields 2513 N at 0.5 MPa, whereas this SAIJ100X185-40-S provides 3927 N. The 40 mm adjustment window is ideal for product changeovers on a line, allowing variable end-stops without replacing the cylinder. For fixed-position tasks without end-tuning needs, a standard SAI cylinder suffices. If your process requires holding the load without continuous air pressure, consider an SAIL or BSAI lock cylinder, as the SAIJ adjuster is strictly a stop.
As a direct ISO 15552 replacement, match the 100 mm bore, 185 mm stroke, 40 mm adjustment, PT tapered port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the 185 mm stroke is relatively short for this bore, side-load stress is minimal, but an external guide is still recommended for heavy off-center 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 SAIJ100BX185-40S 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 0.7 MPa, the push force increases to 5497 N.
The rear adjuster screw lets you mechanically shorten the effective stroke from the nominal 185 mm down to 145 mm. This creates a 145-185 mm travel window for fine-tuning end positions without changing the cylinder.
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