Airtac SAIJ125 Adjustable Cylinder SAIJ125X850-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X850-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 850mm 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
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X850-10S
The AirTAC SAIJ125X850-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N push force at 0.5MPa and features a 10mm adjustment range, creating an exact 840-850mm usable travel window for fine-tuning the retract end position. A PT tapered port thread and carbon steel rod come standard, while the integrated -S magnet enables position sensing via CMSE reed or DMSE electronic switches.
Because the nominal 850mm stroke is substantial, the 32mm rod and M27x2 thread provide necessary rigidity, though an external guide is still recommended to manage side loads over this long distance. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting options cover Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X850-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X850-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 850 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 SAIJ125X850-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×850 | 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 SAIJ125X850-10S Is Used
Machine Changeover
Dial in the 840-850mm retract position precisely during product size changes without swapping cylinders or re-engineering fixed stop blocks.
Long-Stroke Forming
Provides 6136N of push force at 0.5MPa for pressing applications, with a 10mm rear adjustment to set the exact bottoming distance.
Automated Assembly Lines
Uses the integrated -S magnet with DMSE electronic sensors to confirm end-of-stroke arrival while fine-tuning the endpoint during initial setup.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X850-10S the Right Cylinder?
Choose this adjustable model over a fixed SAI cylinder when your assembly requires precise end-position tuning during commissioning or product changeover without adding external stops. If you need less thrust, stepping down to a 100mm bore yields 3927N at 0.5MPa; stepping up to a 160mm bore provides 10053N. Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air—for positive holding, consider an external rod lock, a SAIL cylinder, or a BSAI clamp-lock.
For an exact ISO 15552 replacement, match the 125mm bore, 850mm stroke, 10mm adjustment, PT port thread, and -S magnet. Operating speed is 30-500mm/s, and both ends feature variable air cushions to decelerate the heavy load smoothly.
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 SAIJ125X850-10S FAQ
At 0.5MPa, it provides 6136N push and 5734N pull force, reaching up to 11045N push at 0.9MPa. The operating speed range is 30-500mm/s.
The rear adjuster screw allows you to shorten the effective travel by up to 10mm, creating an 840-850mm usable window. It functions as a mechanical stop to fine-tune the end position and does not lock the load without air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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