Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100S
The AirTAC SAIJ125X210-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a carbon steel piston rod and a built-in magnet (-S) for position sensing. By turning the rear stopper screw, you can trim the effective travel anywhere within a 110-210 mm window, providing immense flexibility for product size changeovers without swapping the actuator.
Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this 125 mm bore actuator handles heavy loads with ease. It uses PT tapered port threads (G1/2) and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic solid-state switches exactly where your process requires.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 210 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 SAIJ125X210-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×210 | 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 SAIJ125X210-100S Is Used
Multi-Part Machining
Dial in the exact end-stop for different casting lengths on a single fixture. The 110-210 mm window lets operators changeover part families in seconds without recalculating fixed stop positions.
Heavy Assembly Pressing
Leverage the 6136 N push force at 0.5 MPa to seat large bearings. The adjustable end-position ensures you never over-travel and damage sensitive components during commissioning.
Variable Length Indexing
Use the rear screw to set precise material feed lengths. The 100 mm trim range accommodates varying material widths on the fly, while the DMSE electronic sensors verify the adjusted position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X210-100S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the thrust for your heaviest fixtures, but a 160 mm bore is physically too large. The 100 mm adjustment range is exceptionally wide, making it the superior choice over a fixed-stroke SAI cylinder when a single machine must process parts of vastly different lengths. Because the nominal stroke is 210 mm, you should still use an external guide to prevent excessive side loading on the 32 mm rod.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm your bore, the 210 mm nominal stroke, the 100 mm adjustment code, PT port threads, and your required mounting style from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster is a travel stop, not a lock; if the machine loses air pressure, the cylinder will not hold its load. For fail-safe load holding without live air, consider an AirTAC SAIL or BSAI 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 SAIJ125X210-100S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear stopper screw mechanically limits the piston's retraction. For this SAIJ125X210-100-S model, you can shorten the 210 mm nominal stroke by up to 100 mm, creating a usable travel window of 110 to 210 mm to fine-tune the end position during setup.
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