Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-30
The AirTAC SAIJ125X115-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates an 85-115mm usable travel window. Delivering 6136N of push force at 0.5 MPa, it handles heavy-duty positioning with precision. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Equipped with a 32mm carbon steel rod and M27x2 thread, this unit withstands demanding mechanical stress. It uses PT tapered ports (G1/2) and relies on variable air cushions at both ends to decelerate the load smoothly. The rear stopper fine-tunes the retract position without requiring external physical stops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125X115-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125X115-30 Is Used
Product Size Changeovers
Quickly modify the 85-115mm end-stop during production line format changes to accommodate varying part dimensions without changing hardware.
Heavy Clamping Positioning
Leverage the 6136N thrust to secure dense workpieces while using the rear screw to fine-tune the exact clamping depth at commissioning.
Assembly Machine Setup
Dial in the precise retraction point during initial machine commissioning to prevent over-travel and ensure consistent press fits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-30 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder's 2513N push force is insufficient, or step down if 6136N is excessive. The 30mm adjustment range is ideal for product changeovers, allowing operators to dial in the exact end position without swapping the cylinder. For load-holding without live air pressure, use a SAIL or BSAI cylinder, as this adjuster is a travel stop, not a lock.
To match this ISO 15552 cylinder, specify a 115mm stroke, up to 30mm adjustment, PT port thread, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Although the stroke is under 300mm, the heavy moving mass means external guiding is recommended for optimal side-load management.
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 SAIJ125X115-30 FAQ
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective stroke by up to 30mm. This creates an 85-115mm travel window, enabling fine-tuning of the end position without adding external stops.
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
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