Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-75S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-75S 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 SAIJ100BX185-75S
The AirTAC SAIJ100X185-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear-mounted stroke adjuster. It delivers a robust 3927N push force at 0.5MPa and features a SUS304 stainless steel rod for superior corrosion resistance. The integrated magnet (-S) supports precise end-position detection using AirTAC CMSE reed or DMSE solid-state sensors mounted in the dual-side barrel grooves.
This specific SKU provides a nominal 185mm stroke that can be mechanically dialed back by up to 75mm, creating a wide 110-185mm usable travel window. This built-in adjustability allows operators to fine-tune retract end-positions during commissioning or product changeovers without physically swapping the cylinder or adding external stop blocks. The rear screw acts purely as a travel stop to set deceleration limits, not as a load-holding lock.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-75S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-75S |
|---|---|
| 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 SAIJ100BX185-75S
| 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 SAIJ100BX185-75S Is Used
Product Size Changeovers
Rapidly reconfigure the 110-185mm travel window for different material lengths on a single production line without disassembling the actuator assembly.
End-Position Tuning
Dial in the exact retract stop during machine commissioning to perfect pressing or clamping depth, avoiding the need for external mechanical shims.
Variable End-Stop Forming
Adjust the rear stop screw to accommodate multiple forming depths on a single fixture, leveraging the 3927N push force at 0.5MPa for reliable operation.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-75S the Right Cylinder?
Choose this 100mm bore cylinder when your application requires substantial thrust—stepping up from a 63mm bore yields 1402N pull at 0.5MPa, while this 100mm bore provides 3681N pull at the same pressure. The adjustable 110-185mm travel window is ideal for machines processing varying product sizes, eliminating the need to maintain multiple fixed-stroke SAI cylinders for different part lengths. Because the 185mm stroke approaches the mid-range of standard travel, ensure your external guide can support the load, as the 25mm rod and M20x1.5 thread handle side loads but cannot fully substitute for a dedicated linear guide.
When replacing an ISO 15552 cylinder, match the 100mm bore, 185mm nominal stroke, 75mm adjustment range, PT tapered G1/2 port, and the -S magnet requirement. SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. If your process requires the load to be held mechanically without live air pressure, this cylinder is insufficient; select an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder 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 SAIJ100BX185-75S FAQ
At 0.5MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. If higher pressure is available, it can deliver up to 7068N push force at 0.9MPa.
The rear adjuster screw allows you to mechanically shorten the effective travel from the nominal 185mm down to as little as 110mm. This creates a 110-185mm usable window, enabling fine-tuning of the retract end-position without replacing the cylinder.
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