Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100S
The AirTAC SAIJ125X115-100-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 115 mm stroke and a 100 mm adjustment range, it provides a highly flexible usable travel window of 15 to 115 mm. This bore delivers 6136 N of push force at 0.5 MPa, making it suited for heavier handling tasks. The extruded aluminum barrel includes sensor grooves on both sides for straightforward detection setup.
Equipped with a -S magnet, this unit supports AirTAC CMSE reed and DMSE solid-state switches. It features a carbon steel rod and PT tapered port threads. The rear stopper allows you to fine-tune end positions during commissioning without adding external stops. Remember that this adjuster acts only as a travel stop, not a lock, so the cylinder will not hold loads without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125X115-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125X115-100S Is Used
Variable End-Stop Machining
Dial in the exact clamping depth on machining fixtures by adjusting the rear stopper from 115 mm down to 15 mm without swapping tooling.
Product Size Changeovers
Quickly adapt diverter arms on a conveyor system for different package lengths by trimming the cylinder stroke during line setup.
Commissioning Fine-Tuning
Perfect the final resting position of heavy actuators during machine commissioning, avoiding the need to bolt on external physical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-100S the Right Cylinder?
Choose this 125 mm bore when your application requires more force than an 80 mm bore (which provides 2513 N push at 0.5 MPa) but less than a 160 mm bore (10053 N push at 0.5 MPa). An adjustable stroke is highly beneficial here because the 100 mm trim range lets you completely change the end-stop distance for product size changeovers on a packaging line. If you need to hold a load securely without continuous air pressure, a standard SAIJ is insufficient; you should select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead.
For ISO 15552 replacement, match the 125 mm bore, 115 mm nominal stroke, 100 mm adjustment, PT G1/2 port, and -S magnet. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the stroke is under 300 mm, side-load concerns are minimal, but the robust 32 mm rod and M27x2 thread handle standard loads effectively.
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 SAIJ125X115-100S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach a maximum of 1251 kgf at 1.0 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke by up to 100 mm. This creates a usable travel window between 15 and 115 mm, allowing precise end-position tuning without replacing the cylinder.
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