Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-20
The AirTAC SAIJ125X160-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 8590N push force at 0.7 MPa, utilizing a 32mm carbon steel rod and a PT G1/2 port. The integrated rear stopper screw allows you to fine-tune the effective travel, creating a usable 140-160mm stroke window for precise end-position calibration without swapping out the hardware.
This adjustable-stroke design is ideal for product changeovers on the factory floor. The extruded aluminum barrel features sensor grooves on both sides for flexible mounting, and the variable air cushions at both ends decelerate heavy loads smoothly. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAIJ125X160-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SAIJ125X160-20 Is Used
Machine Setup Calibration
Dial in the exact 140-160mm end-stop during commissioning to perfectly position heavy machining heads without adding external stop blocks.
Product Changeover
Quickly adjust the stroke length by up to 20mm to accommodate varying package sizes or pallet heights on an automated packaging line.
Heavy Material Handling
Leverage the 8590N push force at 0.7 MPa to push heavy metal billets or molds into position while fine-tuning the retracted resting state.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-20 the Right Cylinder?
Select this 125mm bore when a 100mm cylinder (providing 5497N push at 0.7 MPa) is insufficient for moving heavy fixtures, but a 160mm bore is oversized. The 20mm adjustment window is chosen over a fixed SAI cylinder when you need variable end-stops for machine setup or accommodating slight product size variations on a line. To match this ISO 15552 replacement exactly, specify the 125mm bore, 160mm stroke, 20mm adjustment, PT G1/2 port, and no magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the 160mm nominal stroke is relatively short for this large bore, side-loading is less of a concern than with longer strokes, but you should still ensure the load is guided to prevent binding. For applications requiring the cylinder to hold its position without continuous air pressure, the SAIJ adjuster will not act as a lock; consider an AirTAC SAIL or BSAI series instead.
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 SAIJ125X160-20 FAQ
The rear adjuster acts as an external stopper screw that lets you trim the effective stroke back by up to 20mm. This creates a usable travel window of 140-160mm, allowing you to fine-tune the end position at commissioning without changing the cylinder.
At an operating pressure of 0.7 MPa, the SAIJ125X160-20 provides 8590N of push force and 5734N of pull force. It can deliver a maximum push force of 11045N at 0.9 MPa.
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