Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50S
The AirTAC SAIJ125X105-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 55-105 mm, letting you dial in the exact retract position during commissioning without adding external stops. Driven by a 125 mm bore, it delivers 6136 N of push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa for heavy-duty positioning tasks.
This unit includes a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and supports PT tapered port threads. The extruded aluminum barrel integrates dual sensor grooves, and because this is an -S variant, it includes a magnet ready for CMSE reed or DMSE solid-state switches. The rear adjuster acts purely as a travel stop to set end positions, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125AX105-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125AX105-50S Is Used
Product Changeover Stops
Quickly dial the retract stroke from 105 mm down to 55 mm when switching the production line to a different package size, eliminating the need to physically swap cylinders.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or fixtures into exact final positions, tuning out mechanical variance at commissioning.
Sensor Mapping & Setup
Utilize the integrated magnet and dual sensor grooves to mount CMSE reed or DMSE electronic switches precisely within the 55-105 mm active travel window.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50S the Right Cylinder?
Choose this 125 mm bore when your application requires higher thrust than a 100 mm bore (which provides 3927 N at 0.5 MPa) but does not need the full 10053 N force of a 160 mm cylinder. The 50 mm adjustment range is particularly useful on machines that process varying product sizes, allowing operators to fine-tune the 105 mm nominal stroke down to 55 mm on the fly. For any load-holding requirements without live air pressure, this cylinder is not a lock; you should specify an AirTAC SAIL or BSAI model instead.
When matching this for an ISO 15552 replacement, verify the 125 mm bore, 105 mm stroke, 50 mm adjustment, PT port threads, and the -S magnet. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is over 300 mm? No, at 105 mm side-load is minimal, but the robust 32 mm rod and M27x2 thread still handle high mechanical stress well.
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 SAIJ125AX105-50S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.9 MPa, the push force scales up to 11045 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 105 mm nominal stroke by up to 50 mm, creating a usable travel window of 55 to 105 mm. It only sets the travel end and does not hold the load without live air pressure.
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