Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40 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 SAIJ125AX600-40
The AirTAC SAIJ125X600-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 560 to 600 mm, allowing you to trim the effective stroke by up to 40 mm during commissioning without adding external stops. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty motion tasks with precision.
This model uses a SUS420J2 stainless steel rod (material code A) for enhanced durability against lateral stress. It operates at speeds of 30-500 mm/s and features a PT tapered G1/2 port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40 |
|---|---|
| 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 SAIJ125AX600-40
| 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 SAIJ125AX600-40 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 560-600 mm window during machine setup to accommodate varying workpiece lengths.
Heavy-Duty Product Changeover
Leverage the 6136 N thrust to push heavy pallets or molds, adjusting the stroke by up to 40 mm instantly when line dimensions change.
Commissioning Fine-Tuning
Avoid machining new hard stops; use the rear adjuster to safely trim the travel distance and perfect the end-of-stroke timing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-40 the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (3927 N at 0.5 MPa) lacks the power for your heavy loads, but a 160 mm bore (10053 N) is physically oversized. The 40 mm adjustment range is ideal for product changeovers, letting you fine-tune the retract end position on the fly rather than swapping out a fixed-stroke SAI cylinder. Because the 600 mm stroke is substantial, ensure you use an external guide to prevent excessive side-loading on the rod.
For ISO 15552 replacement matching, specify: 125 mm bore, 600 mm stroke, 40 mm adjustment, PT G1/2 port, SUS420J2 rod, and no magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Remember that the rear adjuster acts only as a travel stop; for load-holding without live air, use a SAIL or BSAI cylinder.
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 SAIJ125AX600-40 FAQ
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw acts as a mechanical stop that shortens the 600 mm nominal stroke by up to 40 mm, giving an effective travel range of 560 to 600 mm. It only sets the end position; it does not lock or hold the load without live air pressure.
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