Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-10 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 SAIJ125AX650-10
The AirTAC SAIJ125X650-10 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 an extruded aluminum barrel with sensor grooves on both sides and a SUS420J2 stainless steel rod. With a nominal 650mm stroke, the external stopper lets you trim the effective travel back by up to 10mm, creating a precise 640-650mm usable window for final commissioning.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when fine-tuning the retract end position. It operates at speeds of 30-500mm/s and uses PT tapered port threads. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure; for load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-10 |
|---|---|
| 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 SAIJ125AX650-10
| 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 SAIJ125AX650-10 Is Used
Heavy-Duty Press Tuning
Dial in the exact 640-650mm retract end-position during press commissioning to accommodate material thickness variations without changing the cylinder.
Product Size Changeover
Quickly adjust the stroke stop on automated assembly lines when switching between different product sizes, minimizing machine downtime.
Long-Stroke Material Handling
Move heavy payloads along a 650mm travel path while using the 10mm adjustment window to fine-tune the final resting position safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-10 the Right Cylinder?
Select this 125mm bore cylinder when an application requires substantial thrust—stepping down to an 80mm bore drops the 0.5MPa push force to 2513N, while stepping up to a 160mm bore yields 10053N. The adjustable 640-650mm travel window is ideal for machine setups requiring exact end-position tuning without mechanical rework. To replace an ISO 15552 cylinder, match the 125mm bore, 650mm stroke, 10mm adjustment, PT port thread, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
Because the 650mm stroke is long and unsupported, the 32mm rod diameter requires an external guide to prevent excessive side-loading and premature seal wear. Additionally, since this SKU lacks the -S magnet option, it cannot host CMSE or DMSE sensors for position detection.
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 SAIJ125AX650-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjusting screw acts as a mechanical stop that shortens the 650mm nominal stroke by up to 10mm, giving a usable travel window of 640-650mm. It only sets the end position and does not lock the load without live air.
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