Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20 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 SAIJ125X600-20
The AirTAC SAIJ125X600-20 is a double-acting, single-rod ISO 15552 profile cylinder engineered with a rear stroke adjuster. It provides a 580-600mm usable travel window, allowing you to dial back the nominal 600mm stroke by up to 20mm during commissioning without swapping out the physical actuator. Delivering 6136N of push force at 0.5MPa, this 125mm bore unit handles heavy-duty positioning with ease.
This extruded aluminum profile cylinder omits tie-rod construction and integrates sensor grooves on both sides for flexible switch mounting. It uses a standard PT tapered port thread and a robust 32mm carbon steel rod. Because the rear adjuster functions strictly as a travel stop and not a locking device, it decelerates the end-of-stroke position but will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20 |
|---|---|
| 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 SAIJ125X600-20
| 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 SAIJ125X600-20 Is Used
Product Changeovers
Fine-tune the 580-600mm travel window on the fly to accommodate slightly different package sizes without physically replacing the cylinder or adding external stops.
Heavy Press Positioning
Leverage the 6136N push force at 0.5MPa to move heavy pallets or tooling, using the rear stopper to precisely set the final lower end-position during machine setup.
Long-Stroke Assembly
Utilize the 600mm reach for large-format automated assembly, relying on the 32mm carbon steel rod to handle the load while dialing in the exact stopping point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X600-20 the Right Cylinder?
Selecting this 125mm bore actuator makes sense when your application requires 6136N of push thrust at 0.5MPa, allowing you to step up from a 100mm bore that only offers 3927N. Choosing the SAIJ variant over a fixed-stroke SAI cylinder is ideal when you need variable end-stops for product-size changeovers on a production line. To match this exact ISO 15552 replacement, verify the 600mm stroke, 20mm adjustment range, PT G1/2 port, and your preferred mounting style from the available Basic, FA, LB, TC, FTC, TCM1, or TCM2 options.
Since this model features a 600mm stroke, the extended 32mm rod and heavy load mandate an external guide to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster only sets the end position; for true load-holding without live air, you must integrate an external rod lock or pilot-operated check valve, or switch to a SAIL or BSAI series cylinder. The operating speed for this bore size is 30-500mm/s.
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 SAIJ125X600-20 FAQ
At 0.5MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If you increase the operating pressure to 0.7MPa, the push force rises to 8590N.
The rear adjuster acts as an external stopper that shortens the effective travel. For this model, it creates a 580-600mm usable window, allowing you to trim the stroke by up to 20mm during commissioning. It only sets the end position and does not lock the load without air pressure.
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