Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20 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 SAIJ100BX185-20
The AirTAC SAIJ100X185-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you dial the effective travel back by up to 20 mm. This yields a usable 165-185 mm end-position window, allowing precise mechanical tuning at commissioning without adding external stops. It delivers 3927 N of push force at 0.5 MPa, scaling up to 7068 N at 0.9 MPa.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this model uses a G1/2 PT tapered port and offers a 30-800 mm/s speed range. The extruded aluminum barrel includes dual sensor grooves, and the mounting interface covers Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that the rear screw acts purely as a travel stop to work with the air cushions; it does not lock the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20 |
|---|---|
| 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 SAIJ100BX185-20
| 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 SAIJ100BX185-20 Is Used
End-Position Tuning
Dial in the exact 165-185 mm travel limit during machine commissioning to crush or form parts precisely without physically swapping the cylinder.
Product Size Changeover
Quickly retract the rear stopper by a few millimeters on the fly to accommodate a slightly shorter workpiece on an automated line.
Heavy-Duty Guiding
Leverage the 25 mm SUS304 rod and 7068 N output at 0.9 MPa for high-thrust clamping tasks, provided an external guide supports the load.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX185-20 the Right Cylinder?
Select this 100 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) is insufficient, but a 125 mm bore is oversized. The 20 mm adjustment range is chosen over a fixed-stroke SAI cylinder when a machine requires variable end-stops for product changeovers. To replace an ISO 15552 cylinder, match the 100 mm bore, 185 mm stroke, 20 mm adjust, PT G1/2 port, and the required mounting. Because no magnet is specified, position sensing is not available out of the box. For any load-holding requirements without live air, select a SAIL or BSAI cylinder instead, as this adjuster is not a brake.
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 SAIJ100BX185-20 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 0.9 MPa, the push force increases to 7068 N.
The nominal 185 mm stroke can be mechanically shortened by up to 20 mm via a rear adjusting screw, giving an effective travel range of 165-185 mm. This screw functions as a hard stop alongside the air cushions and does not hold the load without air pressure.
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Standard models usually ship in 3-4 days.
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