Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50
The AirTAC SAIJ125X100-50 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stroke adjuster. It provides a usable travel window of 50 to 100 mm, allowing you to dial back the nominal stroke by up to 50 mm during commissioning. This bore delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suited for heavy-duty positioning tasks.
Built with a SUS420J2 stainless steel rod (material code A) and PT tapered G1/2 ports, it integrates variable air cushions at both ends to manage impact deceleration. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125AX100-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125AX100-50 Is Used
Product Changeover Tuning
Dial in the exact 50 to 100 mm end-stop position during packaging line format changes without adding external mechanical stops.
Heavy Press Positioning
Leverage 6136 N of thrust at 0.5 MPa to move heavy assemblies while retaining the ability to fine-tune the retraction point.
Machine Setup Calibration
Use the rear adjustment screw to safely set the precise travel limit during initial equipment commissioning and testing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50 the Right Cylinder?
Select this 125 mm bore when an application requires substantial thrust but demands flexible end-position tuning for product changeovers. If you need less force, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa; if you require more power, a 160 mm bore provides 10053 N. The adjustable stroke is chosen over a fixed SAI cylinder when a machine setup requires varying end stops without physically swapping out the barrel.
For load-holding without continuous air pressure, this cylinder is insufficient because the rear adjuster and air cushions only set travel ends, not a lock. You would need to specify a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead. This SAIJ125X100-50 configuration includes a SUS420J2 rod, PT port threads, no internal magnet, and supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ125AX100-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 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 travel from its 100 mm nominal stroke down to as little as 50 mm. This provides a 50 to 100 mm adjustable window, enabling precise end-position tuning without replacing the cylinder.
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