Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20S 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 SAIJ125X600-20S
The AirTAC SAIJ125X600-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125 mm bore and a 600 mm nominal stroke, yielding a usable travel window of 580 to 600 mm. This specific adjustment range allows operators to dial in the exact retract end-position during commissioning without adding external stops. At 0.5 MPa operating pressure, it generates 6136 N of push force and 5734 N of pull force.
This variant includes a magnet for position sensing and uses a standard carbon steel piston rod with an M27x2 thread. The extruded aluminum barrel incorporates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. Fluid must be filtered air at 40 um, and the standard TPU seals support an operating temperature range of -20 to +70 C.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20S |
|---|---|
| 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 SAIJ125X600-20S
| 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 SAIJ125X600-20S Is Used
Machine Changeover
Fine-tune the 580-600 mm retract position during product size transitions without physically swapping the cylinder or repositioning hard stops.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or workpieces, using the adjustable end-stop to accommodate varying package depths.
Press and Forming Setup
Dial in the exact end-of-stroke position during press setup to compensate for material thickness variations, preventing over-travel on long 600 mm strokes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20S the Right Cylinder?
Choose this 125 mm bore when an application requires substantial thrust that exceeds the 3927 N push force of the 100 mm bore at 0.5 MPa, but does not need the 10053 N output of the 160 mm class. The adjustable 580-600 mm travel window is ideal for product-size changeovers on a line, providing precise end-stop tuning that a fixed-stroke SAI cylinder cannot offer. For any 600 mm stroke, the M27x2 rod and thread carry significant side-load capacity, but an external guide is still recommended to prevent rod binding over long unsupported distances.
To replace an ISO 15552 cylinder, match the 125 mm bore, 600 mm stroke, PT tapered port thread, and the -S magnet requirement. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for pilot-operated load holding, 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 SAIJ125X600-20S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 20 mm, providing a usable travel window of 580 to 600 mm. It acts as a mechanical stop to fine-tune the end position and does not lock the load without live air pressure.
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