Airtac SAIJ125 Adjustable Cylinder SAIJ125BX210-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX210-100 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX210-100
The AirTAC SAIJ125X210-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS304 stainless steel rod and PT tapered ports. By turning the external rear screw, you can trim the nominal 210mm travel back by up to 100mm, creating a precise 110-210mm usable window. This allows exact end-position tuning at commissioning without swapping the cylinder or adding external stops.
The rear adjuster acts purely as a travel stop to set the deceleration point alongside the standard air cushions; it does not hold the load without live air. For load-holding without pneumatic pressure, an external rod lock or related types like SAIL and BSAI are required. This extruded aluminum profile cylinder supports CMSE reed and DMSE electronic sensors via its dual side grooves.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX210-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX210-100 |
|---|---|
| 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 SAIJ125BX210-100
| 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 SAIJ125BX210-100 Is Used
Product Changeover
Dial in the 110-210mm travel window during format size changes on a packaging line without physically swapping out the entire actuator.
Machine Setup
Fine-tune the exact end-of-stroke position during initial commissioning to achieve perfect mechanical alignment without external shims.
Variable End Stops
Provide a flexible deceleration point for heavy moving loads, utilizing the 100mm adjustment range to adapt to varying process depths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX210-100 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder lacks thrust, as stepping up provides a significant increase from 2513N to 6136N push force at 0.5 MPa. The extensive 100mm adjustment range is ideal for product-size changeovers on a packaging line, letting you dial in the exact 110-210mm travel window on the fly instead of machining separate hard stops. When specifying a replacement, match the 125mm bore, 210mm stroke, 100mm adjuster, PT ports, and SUS304 rod material. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the stroke is 210mm, ensure adequate external guiding to prevent excessive rod side-loading.
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 SAIJ125BX210-100 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 210mm nominal stroke by up to 100mm, providing an effective usable travel window of 110-210mm. The adjuster is a mechanical stop, not a lock, so it only sets the end position and does not hold the load without live air.
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Standard models are processed and dispatched in 3-5 business days.
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