Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 65mm 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
- Stroke65 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30S
The AirTAC SAIJ125X65-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a 65 mm nominal stroke and a 30 mm adjustment range, it provides a usable travel window of 35-65 mm. This bore size delivers 6136 N of push force at 0.5 MPa, making it well suited for heavy-duty positioning tasks.
This specific configuration includes a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance, along with a built-in magnet (-S) that is fully compatible with AirTAC CMSE reed and DMSE electronic sensors. The fluid port features a PT tapered thread, and the extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 65 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 SAIJ125AX65-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×65 | 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 SAIJ125AX65-30S Is Used
Heavy Press Tuning
Dial in the exact 35-65 mm travel window during machine setup to accommodate varying material thicknesses without swapping out the entire cylinder.
Product Changeover Stops
Quickly adjust the retract end-stop on a packaging line when switching between different product sizes, ensuring precise positioning on the fly.
Assembly Actuation
Leverage the 6136 N push force at 0.5 MPa for demanding assembly presses, using the rear stop to fine-tune the final clamp position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30S the Right Cylinder?
Choose this 125 mm bore model when your application requires high thrust—such as 6136 N at 0.5 MPa—combined with the ability to dial in a precise retract end-stop during commissioning. If your process demands less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The adjustable rear screw is strictly a travel stop that decelerates the load; it does not hold the load without live air pressure. For true load-holding without continuous air, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder.
When matching this as an ISO 15552 replacement, verify the 125 mm bore, 65 mm stroke, 30 mm adjustment, PT G1/2 port, and the required mounting style from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Note that SAIJ omits the FB, CA, CB, and CR mounts. The 32 mm rod and M27x2 thread provide excellent side-load resilience, though any application with heavy offset loads should still use an external guide.
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 SAIJ125AX65-30S FAQ
At 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. If you need higher force, increasing the pressure to 0.7 MPa yields 8590 N of push force.
The rear adjuster screw acts as an external stop, allowing you to trim the effective travel back by up to 30 mm from the 65 mm nominal stroke. This creates a usable 35-65 mm window, letting you fine-tune the end position at commissioning without adding external stops.
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