Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50
The AirTAC SAIJ125X80-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 80 mm stroke that can be dialed back by up to 50 mm, yielding a highly flexible 30-80 mm usable travel window for precise end-position tuning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy actuation tasks with ease.
This SKU features a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, though this specific configuration ships without a magnet, meaning CMSE or DMSE electronic sensors cannot be used for position detection without modification. The adjuster functions purely as a mechanical stop to decelerate the travel end, not as a lock to hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125AX80-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125AX80-50 Is Used
Product Changeover
Dial in the 30-80 mm travel window on the fly to accommodate different workpiece sizes on the same production line without changing cylinders.
Machine Setup Tuning
Use the rear stopper to fine-tune the exact retract end position during commissioning, eliminating the need to bolt on external physical stops.
Heavy Forming Operations
Leverage the 6136 N push force at 0.5 MPa for pressing or forming tasks where the exact end-of-stroke contact point must be micro-adjusted per batch.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-50 the Right Cylinder?
Choose this 125 mm bore when an application requires substantial thrust—6136 N push and 5734 N pull at 0.5 MPa. If your setup needs less force, stepping down to a 100 mm bore yields 3927 N push, while moving up to a 160 mm bore provides 10053 N. The 50 mm adjustment range is ideal for machine setups requiring frequent product-size changeovers, allowing operators to fine-tune the retract distance without swapping the cylinder or adding external stops.
For replacements, match the 125 mm bore, 80 mm stroke, 50 mm adjustment, PT ports, and the absence of a magnet (-S). Because the stroke is under 300 mm, side-load stress is manageable, but the 32 mm rod and M27x2 thread still provide robust support for moderate lateral forces. Remember that the rear adjuster only sets the travel end; for true load-holding without live air, consider an AirTAC SAIL or BSAI series cylinder. This SAIJ model uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX80-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf of push force.
The rear adjuster acts as a mechanical stop that lets you trim the 80 mm nominal stroke back by up to 50 mm. This creates a 30-80 mm usable travel window, allowing you to set the exact retract position during commissioning without replacing the cylinder.
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