Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10
The AirTAC SAIJ125X120-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 110-120mm usable travel window, letting you trim the 120mm nominal stroke by up to 10mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides, and the standard carbon steel rod handles heavy loads with a 32mm diameter and M27x2 thread.
This adjustable-stroke design eliminates the need to swap cylinders or add external stops when fine-tuning machine end-positions. It uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAIJ125X120-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAIJ125X120-10 Is Used
Machine Setup Tuning
Fine-tune the 110-120mm retraction end-point during initial machine commissioning without machining external stopper blocks.
Product Changeover
Quickly adjust the stroke by up to 10mm on a packaging line when switching to a slightly different product size.
Heavy Material Handling
Utilize the 6136N push force at 0.5 MPa to move heavy pallets or workpieces while trimming travel to prevent overshoot.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X120-10 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (providing 3927N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore is physically too large. The 10mm adjustment window is ideal for dialing in exact retraction end-points during product changeovers rather than relying on a fixed-stroke SAI cylinder. Because the stroke is 120mm, side-load risks are moderate, but ensure proper external guiding for heavy loads.
For replacement, verify the 125mm bore, 120mm stroke, 10mm adjustment, PT tapered port thread, and the specific mounting style. This cylinder has no internal magnet; if position sensing is required, select an -S variant and use AirTAC CMSE reed or DMSE electronic sensors. Remember that the rear adjuster is a stop, not a lock; for load-holding without live air, consider an AirTAC 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 SAIJ125X120-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 120mm nominal stroke by up to 10mm, creating a 110-120mm usable travel window. It functions as a mechanical stop to set the exact end-position and does not lock the load without continuous air pressure.
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