Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-100
The AirTAC SAIJ125X150-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N pull force at 0.5 MPa and 8590N at 0.7 MPa, utilizing a 32mm carbon steel rod and a G1/2 port. The built-in rear stopper allows you to trim the nominal 150mm stroke back by up to 100mm, creating a precise 50-150mm usable travel window for exact end-position tuning during commissioning.
This adjustable feature means you can fine-tune the retract distance on a product changeover without swapping the cylinder or adding external stops. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. The rear adjuster acts purely as a mechanical travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125X150-100 Is Used
Machine Changeover
Dial in the retract stroke from 150mm down to 50mm during product size transitions without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the exact end-of-stroke position at commissioning to perfect seating or clamping forces on varying workpiece heights.
Adjustable Assembly Press
Use the 125mm bore's 8590N force at 0.7 MPa for pressing operations while retaining the flexibility to shorten the travel for smaller components.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-100 the Right Cylinder?
Choose this 125mm bore when your application requires pushing forces around 6136N to 8590N. If your process needs less force, stepping down to a 100mm bore yields 3927N at 0.5 MPa, whereas stepping up to a 160mm bore provides 10053N. The 150mm nominal stroke on this model is well within the 1500mm maximum standard stroke for this bore, and the 30-500mm/s speed range handles robust industrial pacing.
An adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for machine setup or product-size changes. To match this ISO 15552 replacement, specify the 125mm bore, 150mm stroke, 100mm adjustment, G1/2 PT ports, and the required mounting bracket. Because the rod lacks a magnet, position sensing requires adding a separate magnet or choosing an -S variant for CMSE reed or DMSE electronic sensors.
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 SAIJ125X150-100 FAQ
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 100mm. This creates a usable travel window of 50-150mm, allowing you to trim the 150mm nominal stroke back to exactly where the process requires without changing the cylinder.
This 125mm bore cylinder generates 6136N of pull force at 0.5 MPa and 8590N at 0.7 MPa. The rear adjuster and air cushions only decelerate the travel end; they do not hold the load without live air. For load-holding without pressure, use a SAIL or BSAI series cylinder.
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