Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 650mm 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
- Stroke650 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-10
The AirTAC SAIJ125X650-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits fine-tuning of the retract end-position. With a nominal 650mm stroke and a 10mm adjustment range, it provides a usable travel window of 640 to 650mm. This allows operators to dial in the exact end-stop during commissioning without swapping out the entire actuator. It delivers 6136N of push force and 5734N of pull force at 0.5MPa, driven by a robust 32mm carbon steel rod with an M27x2 thread.
This model utilizes a PT tapered port thread and operates at speeds of 30-500mm/s. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors, though this specific SKU omits the internal magnet. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 configurations, intentionally omitting FB, CA, CB, and CR brackets. It is important to note that the rear adjuster acts purely as a mechanical stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 650 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 SAIJ125X650-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×650 | 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 SAIJ125X650-10 Is Used
Press Tonnage Calibration
Dial in the exact 640-650mm end-stop during machine commissioning to accommodate varying material thicknesses without adding external spacers.
Product Diversion Setup
Adjust the retract position by up to 10mm on the fly to handle size changes in product flow without physically replacing the actuator.
Large Assembly Jigs
Leverage the 6136N push force to move heavy structural components while fine-tuning the final resting position to match jig tolerances.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X650-10 the Right Cylinder?
Selecting this 125mm bore actuator is ideal when an application requires over 6000N of thrust at 0.5MPa but needs the flexibility of a variable end-stop for product size changeovers. If your thrust requirements are lower, stepping down to a 100mm bore yields 3927N of push force, whereas stepping up to a 160mm bore provides 10053N. The 10mm adjustment window on this SKU is perfect for minor mechanical setup tweaks rather than large travel variations. For fixed-stroke applications without the need for end-position tuning, the standard SAI cylinder is a simpler alternative.
Because the 650mm stroke is substantial, the 32mm carbon steel rod will experience higher bending moments under side loads; an external guide bearing is strongly recommended to prevent premature wear. When replacing an existing ISO 15552 cylinder, match the 125mm bore, 650mm stroke, PT G1/2 port, and the chosen mounting bracket. Remember that neither the rear adjuster nor the air cushions function as a lock; if the load must be held without live air, consider the SAIL or BSAI series instead.
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 SAIJ125X650-10 FAQ
It features a rear adjusting screw that allows you to shorten the effective stroke by up to 10mm, providing a usable travel window of 640 to 650mm. This mechanical stopper fine-tunes the retract end-position at commissioning but does not lock the load without live air pressure.
At a 0.5MPa operating pressure, this double-acting cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0MPa pressure, it can deliver up to 1251 kgf of thrust.
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