Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40S
The AirTAC SAIJ125X600-40-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 560 to 600 mm, allowing you to dial back the nominal 600 mm stroke by up to 40 mm during commissioning. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty positioning. The extruded aluminum barrel incorporates sensor grooves on both sides, and the included magnet (-S) supports precise end-of-stroke detection via CMSE reed or DMSE electronic solid-state switches.
This unit utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The PT tapered port threads match the 125 mm bore standard. The rear adjuster acts strictly as a mechanical stop to fine-tune the retract position without swapping cylinders, though it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125AX600-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125AX600-40S Is Used
Product Changeover Adjustment
Dial in the 560-600 mm travel window during line changeovers to accommodate different product lengths without physically swapping out the actuator.
Heavy-Duty Positioning
Leverage 6136 N of thrust at 0.5 MPa to shift heavy jigs into place, using the rear stopper to precisely set the final retract position.
Automated Assembly Setup
Fine-tune end-stops during initial machine commissioning to perfect pressing or locating operations, avoiding the need for external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40S the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (offering 2513 N push at 0.5 MPa) is insufficient for your load, but a 160 mm bore (10053 N) would be overkill. An adjustable stroke is preferred over a fixed SAI cylinder when you need variable end-stops for product changeovers or fine-tuning at machine setup. For load-holding without continuous air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead, as the SAIJ adjuster is only a travel stop. To match this ISO 15552 replacement, use: 125 mm bore, 600 mm stroke, 40 mm adjustment, PT port, SUS420J2 rod, and -S magnet.
Because the 600 mm stroke is substantial, always support the load with an external guide rail. The 32 mm rod diameter handles high thrust, but long unsupported strokes invite side-load damage. Available mountings include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Operating speed is 30-500 mm/s, supported by air cushions at both ends.
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 SAIJ125AX600-40S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force reaches 11045 N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective travel from 600 mm down to 560 mm. It fine-tunes the end position but does not lock or hold the load without live air pressure.
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