Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75
The AirTAC SAIJ125X75-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136 N of pull force at 0.5 MPa. By turning the external rear stopper screw, you can fine-tune the effective travel down from the 75 mm nominal stroke, yielding a highly versatile 0-75 mm usable window for exact end-position tuning at commissioning.
This bore features a robust 32 mm carbon steel rod and M27x2 rod thread, handling substantial side loads, while standard PT tapered ports manage air supply. The adjuster acts purely as a travel stop and deceleration boundary, meaning it will not hold a load without live air pressure. For position holding, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125X75-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125X75-75 Is Used
Variable End Stops
Dial the stroke from 0 to 75 mm to establish precise, repeatable end positions for delicate pressing or positioning tasks without adding external stops.
Machine Changeover
Rapidly reconfigure the travel distance during product line changeovers by adjusting the rear screw, drastically reducing setup downtime.
Product Size Adaptation
Accommodate varying package or component sizes on a single conveyor line by fine-tuning the retract stroke to match each new dimension.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-75 the Right Cylinder?
Select this 125 mm bore when your application requires up to 6136 N pull force at 0.5 MPa, stepping up from a 100 mm bore that provides 3681 N. The 75 mm adjustment range is exceptionally broad, allowing a single cylinder to be dialed back to a near-zero stroke, making it perfect for machines processing varying product sizes without requiring physical cylinder swaps.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 75 mm stroke, PT port thread, and the desired 75 mm adjustment range. Note that SAIJ uses a specific mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. This standard configuration lacks a magnet; add an -S suffix if you require 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 SAIJ125X75-75 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. It can deliver up to 11045 N of push force at 0.7 MPa.
The rear stopper screw allows you to trim the effective travel anywhere within a 0-75 mm window from the nominal 75 mm stroke. This stopper sets the travel end and deceleration point but does not lock or hold the load without continuous air pressure.
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