Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30S
The AirTAC SAIJ125X800-30-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 770 to 800 mm, allowing you to dial back the 800 mm nominal stroke by up to 30 mm during machine commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning tasks with precision.
This variant includes a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance and a PT tapered port thread. It is equipped with a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the adjustable stopper functions strictly as a travel end deceleration device, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAIJ125AX800-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125AX800-30S Is Used
Variable End-Stop Setup
Dial in the exact 770 to 800 mm travel distance during machine commissioning to accommodate varying product widths without physically changing the cylinder.
Product Changeover Systems
Quickly adjust the rear stopper on packaging lines to handle different carton sizes, using the 30 mm adjustment range to fine-tune the pusher end position.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or fixtures, relying on the robust 32 mm SUS420J2 stainless steel rod for durability.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX800-30S the Right Cylinder?
Choose this 125 mm bore cylinder when an application requires substantial thrust—6136 N push and 5734 N pull at 0.5 MPa—combined with variable end-stop positioning. If your process requires less force, stepping down to an 80 mm bore yields 2513 N, whereas moving up to a 160 mm bore provides 10053 N. The adjustable stroke is ideal for product changeovers, enabling fine end-position tuning without swapping the cylinder or adding external stops.
Because the 800 mm stroke is long, the 32 mm rod and M27x2 rod thread will carry significant side loads; an external guide rail is recommended to prevent rod binding. For load-holding without live air pressure, this cylinder is insufficient since the rear adjuster and air cushions only decelerate travel. You would need a SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock. This SKU is dimensionally interchangeable per ISO 15552 and 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 SAIJ125AX800-30S 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.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back by up to 30 mm. This creates a 770 to 800 mm usable stroke window, allowing precise end-position tuning without adding external stops.
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