Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm 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.
- BoreØ125 mm
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S
The AirTAC SAIJ125X185-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa. The built-in magnet (-S) supports position detection via AirTAC CMSE reed or DMSE solid-state sensors. A carbon steel piston rod and PT tapered ports are standard.
With a nominal 185 mm stroke and a 100 mm adjustment range, this SKU provides a usable travel window of 85 to 185 mm. This wide adjustment span is ideal for product-size changeovers, allowing you to dial in the exact retract end-position during commissioning without swapping the hardware. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | 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 SAIJ125 Adjustable Cylinder SAIJ125X185-100S Is Used
Variable End-Stop Setup
Dial in the retract position from 85 to 185 mm during machine commissioning to hit exact product dimensions without adding external stops.
Product Changeover
Quickly adapt the cylinder stroke on packaging lines when switching between different package lengths, minimizing downtime.
Heavy Clamping Force
Leverage 6136 N of thrust at 0.5 MPa to securely hold heavy workpieces while fine-tuning the clamping depth via the rear screw.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-100S the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) lacks the necessary thrust, but stepping up to a 160 mm bore (10053 N) would be excessive overkill. The 100 mm adjustable window is perfect for machines running multiple product sizes, replacing the need for fixed SAI cylinders at each station. Since the stroke is 185 mm, side-load risks are moderate, but an external guide is still recommended for heavy loads.
To match this ISO 15552 interchangeable cylinder, specify: 125 mm bore, 185 mm nominal stroke, 100 mm adjustment, PT port threads, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that the rear adjuster acts purely as a mechanical stop and does not hold the load without live air; for true load-holding without pressure, use an SAIL or BSAI lock 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 SAIJ125 Adjustable Cylinder SAIJ125X185-100S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw lets you shorten the effective stroke from the nominal 185 mm down to 85 mm, giving a 100 mm usable travel window. The adjuster acts as a mechanical stop and does not lock the load without live air pressure.
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