Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-50 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-50
The AirTAC SAIJ125X165-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 165 mm travel by up to 50 mm for a usable window of 115-165 mm. Delivering 6136 N of pull force at 0.5 MPa, it handles heavy positioning tasks while maintaining a standard ISO 15552 mounting footprint. The extruded aluminum barrel features sensor grooves on both sides, and the piston rod is built from SUS304 stainless steel for superior corrosion resistance.
This model uses PT tapered port threads and operates at speeds between 30-500 mm/s. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning or product changeover without adding external stops. It is important to note that this adjuster is not a locking device; the cylinder cannot hold a load without live air pressure, so applications requiring true load-holding should utilize a SAIL or BSAI variant.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-50 |
|---|---|
| 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 SAIJ125BX165-50
| 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 SAIJ125BX165-50 Is Used
Variable End-Stop Machining
Dial in the exact 115-165 mm retract position for machining operations that require frequent adjustments to accommodate different part lengths.
Product Changeover Lines
Rapidly reconfigure conveyor sorting arms by up to 50 mm during product size transitions without swapping out the entire cylinder assembly.
Heavy Assembly Pressing
Utilize the 6136 N pull force at 0.5 MPa to press components securely, using the rear stop to fine-tune the final pressing depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-50 the Right Cylinder?
Choose this 125 mm bore when the 80 mm bore's 2268 N pull at 0.5 MPa is insufficient, but a 160 mm bore would be excessive. The 50 mm adjustment range is ideal for machinery requiring variable end-stops during product size changeovers, offering flexibility that a fixed-stroke SAI cylinder cannot. For an exact ISO 15552 replacement match, specify a 125 mm bore, 165 mm stroke, 50 mm adjustment, PT ports, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting. Since the stroke is under 300 mm, standard side-load guidance is less critical, but external guides are still recommended for heavy lateral loads.
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 SAIJ125BX165-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. It can deliver up to 11045 N of push force at 0.7 MPa.
The rear adjuster screw allows you to mechanically shorten the 165 mm nominal stroke by up to 50 mm, providing a usable travel window of 115-165 mm. This stopper sets the end position but does not lock or hold the load without continuous air pressure.
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Standard models are processed and dispatched in 3-5 business days.
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