Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20
The AirTAC SAIJ125X165-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 32mm carbon steel rod with an M27x2 thread. By turning the rear screw, you can trim the nominal 165mm travel back by up to 20mm, creating a precise 145-165mm usable window for product changeovers.
This extruded aluminum barrel design includes variable air cushions at both ends to manage kinetic energy. The rear adjuster acts as a mechanical stop to set the end position, but it does not hold the load without live air pressure. For position holding, consider the SAIL or BSAI series. The dual sensor grooves support CMSE reed and DMSE electronic switches if a magnet is added.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125X165-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125X165-20 Is Used
Machine Setup & Changeover
Dial in the 145-165mm travel window during product line changeovers to accommodate different material thicknesses without replacing the actuator.
Heavy Material Positioning
Leverage the 6136N push force at 0.5 MPa to shift heavy workpieces, using the rear stop to precisely set the retract end position.
Variable End-Stop Calibration
Fine-tune the final resting position during commissioning by adjusting the rear screw up to 20mm, avoiding the need for external mechanical stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20 the Right Cylinder?
Choose this 125mm bore when your application requires heavy thrust beyond the 3927N push force of the 100mm SAIJ variant. The 20mm adjustment range is ideal for fine-tuning the retract end during commissioning without swapping the cylinder or adding external stops. Since the nominal stroke is 165mm, no external guide is strictly required for side loads, but the robust 32mm rod helps manage moderate bending moments.
When ordering an ISO 15552 replacement, match the 125mm bore, 165mm stroke, PT tapered port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable series. A standard carbon steel rod and no magnet are configured for this SKU.
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 SAIJ125X165-20 FAQ
At an operating pressure of 0.5 MPa, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. It can reach a maximum push force of 1251 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the nominal 165mm stroke by up to 20mm, providing a usable travel window of 145-165mm. This mechanical stop sets the end position but does not lock or hold the load without continuous air pressure.
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