Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-75 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 SAIJ125X115-75
The AirTAC SAIJ125X115-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 6136N extend force at 0.5 MPa and allows you to dial back the 115mm nominal stroke by up to 75mm, creating a 40-115mm usable travel window for precise end-position tuning.
This bore uses a 32mm carbon steel rod with an M27x2 thread to handle high side loads, and PT tapered ports for sealing. The extruded aluminum barrel includes sensor grooves on both sides, and the SAIJ mounting set omits FB, CA, CB and CR brackets, offering Basic, FA, LB, TC, FTC, TCM1 and TCM2 options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-75 |
|---|---|
| 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 SAIJ125X115-75
| 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 SAIJ125X115-75 Is Used
Changeover Adjustments
Dial in the 40-115mm travel window during product line changeovers to set exact retract positions without machining new hard stops.
Heavy Assembly Pressing
Leverage the 6136N extend force to seat large components, using the rear screw to fine-tune the pressing depth precisely.
End-Stop Calibration
Trim the effective stroke during commissioning to prevent mechanical interference, relying on the built-in stopper instead of external spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X115-75 the Right Cylinder?
Choose this 125mm bore when 80mm (2513N at 0.5 MPa) is too weak but 160mm (10053N) is oversized. The 75mm adjustment range is ideal for machine setups requiring frequent product-size changeovers, letting you fine-tune the retract stop without swapping cylinders or adding external stops. Remember the rear adjuster is a travel stop, not a lock; for load-holding without live air, use an external rod lock or pilot-operated check valve. To match this ISO 15552 replacement, specify the 125mm bore, 115mm stroke, 75mm adjustment, PT port, and the required mounting bracket.
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 SAIJ125X115-75 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can deliver up to 8590N of push force at 0.7 MPa.
The rear adjuster screw acts as a mechanical stop that can shorten the 115mm nominal stroke by up to 75mm, giving a usable travel window of 40-115mm. It sets the retract end position but does not lock the load without live air pressure.
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