Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50 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 SAIJ125AX105-50
The AirTAC SAIJ125X105-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6133N of push force at 0.5 MPa and provides a usable travel window of 55 to 105 mm, allowing you to dial back the nominal 105 mm stroke by up to 50 mm during commissioning. This eliminates the need to physically swap the cylinder or bolt on external stops when tuning end positions.
This SKU is configured with a SUS420J2 stainless steel rod (material option A) for enhanced durability against moisture and minor surface scuffs. As an extruded aluminum profile cylinder, it includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific unit is built without a magnet. The rear adjuster acts purely as a travel stop to set deceleration points and will not hold a load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50 |
|---|---|
| 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 SAIJ125AX105-50
| 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 SAIJ125AX105-50 Is Used
Product Size Changeovers
Quickly adapt a packaging line to new carton dimensions by dialing the rear adjuster within the 55-105 mm window, avoiding cylinder removal.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to perfect a pressing or clamping distance without adding external mechanical stops.
Variable Stroke Dwell
Set precise deceleration points for heavy 6136N loads using the rear stopper combined with the integrated 40 mm air cushion.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-50 the Right Cylinder?
Choose this 125 mm bore when your application requires heavy thrust—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513N, whereas this model provides 6136N. The 50 mm adjustment range is ideal for product-size changeovers on a line, giving operators a wide 55-105 mm window to fine-tune the retract position without changing the mounting footprint. Because the stroke is 105 mm, side-loading is moderate, but an external guide should still be used if the load is unsupported.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 105 mm nominal stroke, 50 mm adjustment range, PT tapered port threads, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable series. If your process requires the load to stay in place during an air loss event, select a SAIL or BSAI locking cylinder instead, as the SAIJ adjuster is not a brake.
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 SAIJ125AX105-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf of push force.
The rear adjuster screw lets you shorten the effective travel from the nominal 105 mm down to as little as 55 mm. This creates a 55-105 mm adjustable window for setting the retract end-position without swapping the cylinder.
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