Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100
The AirTAC SAIJ125X140-100 is a double-acting, extruded aluminum profile cylinder dimensionally interchangeable per ISO 15552, featuring a rear stroke adjuster. It provides a nominal 140 mm stroke with an integrated stopper that allows you to dial back the travel by up to 100 mm, creating a wide 40-140 mm usable positioning window. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty tasks.
The 32 mm piston rod and M27x2 thread handle high side loads, while the PT tapered port provides a tight pneumatic seal. It uses adjustable air cushions at both ends for smooth deceleration. Remember that the rear adjuster acts only as a travel stop, not a lock, so the cylinder cannot hold loads without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125X140-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125X140-100 Is Used
Variable Product Changeover
Dial in the exact end-stop for different material thicknesses on a single line, utilizing the 40-140 mm travel window without adding external shims.
Heavy-Duty Pressing
Leverage the 6136 N of thrust at 0.5 MPa for assembly operations, adjusting the precise lower dead point during machine setup.
End-Position Tuning
Fine-tune the retract stroke during commissioning to clear obstructions or synchronize with downstream equipment using the rear stopper screw.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-100 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) is insufficient for your load. The massive 100 mm adjustment range is ideal for equipment that processes varying product sizes, allowing you to fine-tune the retract end position at commissioning without swapping hardware. For load-holding without live pressure, select a SAIL or BSAI cylinder instead.
When matching this for an ISO 15552 replacement, verify the 140 mm stroke, 100 mm adjuster, PT G1/2 port, and your required mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Because the stroke is 140 mm, ensure external guiding to prevent rod bending under offset loads.
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 SAIJ125X140-100 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N push at 0.9 MPa.
The rear adjuster screw lets you shorten the 140 mm nominal stroke by up to 100 mm, creating a usable travel window between 40 and 140 mm. The adjuster acts as a physical stop and does not lock the load without air pressure.
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