Airtac SAIJ125 Adjustable Cylinder SAIJ125BX105-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX105-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 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 SAIJ125BX105-50
The AirTAC SAIJ125X105-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and features a 50mm adjustment range, creating a precise 55-105mm usable travel window for dialing in end positions. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
This model uses a SUS304 stainless steel rod (option B) for superior corrosion resistance and carries a G1/2 port. The rear adjuster acts strictly as a travel stop to decelerate the load, meaning it will not hold the load without live air pressure. For applications requiring position holding without continuous pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX105-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX105-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125BX105-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125BX105-50 Is Used
Machine Setup Calibration
Dial in the exact end position during commissioning using the 55-105mm travel window, avoiding the need to machine custom spacer blocks for initial machine alignment.
Product Size Changeovers
Quickly adapt the stroke length on packaging lines when switching product sizes, using the rear screw to trim the retract position by up to 50mm on the fly.
Variable End-Stop Forming
Provide a precise mechanical stop for pressing or forming operations, relying on the 6136N force capacity and the 32mm rod to handle high side loads during the process.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX105-50 the Right Cylinder?
Choose this 125mm bore cylinder when a 100mm bore (879N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore (14074N at 0.5 MPa) would be excessive. The 50mm adjustment range is ideal for product changeovers on a line, allowing you to fine-tune the end stop without swapping the cylinder or adding external stops. To match this ISO 15552 interchangeable cylinder, verify the 105mm stroke, 50mm adjustment, PT tapered G1/2 port, SUS304 rod, and standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ125BX105-50 FAQ
At a 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the 105mm nominal stroke by up to 50mm, giving a usable travel window of 55-105mm. It only sets the end position and does not lock the load without live air pressure.
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