Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100
The AirTAC SAIJ125X450-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a substantial 8590N push force at 0.7 MPa and provides a usable travel window of 350 to 450 mm, allowing you to dial back the nominal stroke by up to 100 mm. This built-in adjustability enables fine end-position tuning at commissioning without swapping the cylinder or adding external stops.
This model features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered ports (G1/2). The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic switches. Remember that the rear adjuster acts purely as a travel stop to set deceleration endpoints; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAIJ125AX450-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAIJ125AX450-100 Is Used
Product Size Changeovers
Quickly adapt automated machinery to varying product dimensions by dialing in the exact 350-450 mm travel distance during line changeovers.
End-Position Tuning
Fine-tune the retracted end-stop during commissioning to perfect machine timing without fabricating external mechanical stoppers.
Adjustable Clamping Setup
Secure heavy workpieces with 8590N of force while altering the clamping depth precisely via the rear adjustment screw.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100 the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires heavy thrust (8590N at 0.7 MPa) alongside flexible end-positioning. If you need less force, stepping down to an 80 mm bore yields 3518N at 0.7 MPa, while a 160 mm bore provides 14074N for larger loads. The adjustable stroke is ideal for machine setups requiring frequent product-size changeovers, serving as a variable end-stop that replaces fixed-stroke SAI cylinders when exact travel distances vary.
For ISO 15552 replacement matching, verify the 450 mm stroke, 100 mm adjustment range, PT port thread, and required mounting style. SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because this cylinder has a 450 mm stroke, the unsupported rod length requires an external guide to prevent excessive side-loading. For load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ125AX450-100 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates a push force of 8590N and a pull force of 5734N. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 100 mm, creating a usable travel window between 350 and 450 mm. This mechanism functions as a travel stop to set deceleration endpoints and does not lock or hold the load without continuous air pressure.
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