Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30 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 SAIJ125AX65-30
The AirTAC SAIJ125X65-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 35 to 65 mm, allowing you to trim the nominal 65 mm stroke by up to 30 mm during commissioning. Equipped with a SUS420J2 stainless steel rod and PT tapered ports, it delivers a robust 6136 N pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR options. The rear adjuster acts as a mechanical stop to fine-tune the retract end position, but it does not hold the load without live air pressure. For position holding without continuous air, consider a SAIL or BSAI variant.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30 |
|---|---|
| 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 SAIJ125AX65-30
| 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 SAIJ125AX65-30 Is Used
Machine Changeover
Dial in the exact retract distance from 35 to 65 mm when switching product sizes on a packaging line, eliminating the need to physically swap cylinders.
End-Position Tuning
Fine-tune the retract stop during commissioning to perfect mechanical timing without fabricating custom external spacers.
Heavy-Duty Clamping
Leverage the 6136 N pull force at 0.5 MPa to securely hold large workpieces, using the adjustable stop to set the exact clamp depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX65-30 the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder (providing 2268 N pull at 0.5 MPa) cannot generate enough force, as the SAIJ125X65-30 yields 6136 N pull at 0.5 MPa. An adjustable stroke is ideal for product changeovers where the exact retract distance needs fine-tuning without swapping cylinders or adding external stops. When specifying your ISO 15552 replacement, match the 65 mm stroke, 30 mm adjustment, PT ports, and mounting style. Since no magnet is specified, this unit will not work with CMSE or DMSE sensors.
For strokes of 65 mm, side-load is minimal, but always ensure proper guide alignment. Remember that the rear adjuster is a travel stop, not a lock; the cylinder will not hold its load if air pressure drops.
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 SAIJ125AX65-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the nominal 65 mm down to as little as 35 mm. This creates a 35-65 mm adjustable travel window for fine-tuning at commissioning, but it is a stop, not a lock, and requires live air to hold the load.
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