Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-30
The AirTAC SAIJ125X170-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 140-170 mm usable travel window, allowing you to dial back the 170 mm nominal stroke by up to 30 mm during commissioning. The 125 mm bore delivers 8590 N of push force at 0.7 MPa and 5734 N of pull force, making it suited for heavy-duty positioning tasks.
This unit features a carbon steel piston rod with an M27x2 thread and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. A variable air cushion at both ends manages end-of-stroke deceleration, while the rear adjuster acts purely as a travel stop rather than a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125X170-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125X170-30 Is Used
Heavy Pressing Assembly
Apply up to 8590 N of precise pressing force, using the 30 mm adjuster to perfectly tune the bottom dead center for delicate component insertion without machine teardown.
Product Changeover Stops
Shift end-stops rapidly on a packaging line. The 140-170 mm travel window lets operators accommodate varying carton sizes by simply turning the rear adjuster screw.
Adjustable Ejector Setup
Dial in the exact ejection distance for heavy parts. The rear stop fine-tunes the retract position, ensuring parts clear the mold without needing custom spacers.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-30 the Right Cylinder?
Choose this 125 mm bore when your application requires higher thrust than a 100 mm bore (which provides 5497 N push at 0.7 MPa) but does not need the full 14074 N push force of a 160 mm variant. The adjustable stroke is ideal for machinery requiring exact end-position tuning or frequent product changeovers without swapping cylinders or adding external stops. For drop-in compatibility, match the 125 mm bore, 170 mm stroke, 30 mm adjustment, PT ports, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounts. Because the stroke is 170 mm, an external guide rail is recommended to manage side loads on the M27x2 rod.
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 SAIJ125X170-30 FAQ
The rear adjusting screw allows you to shorten the effective stroke by up to 30 mm, creating a 140-170 mm usable travel window. It acts as a mechanical stop to fine-tune the retract position without adding external stops.
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. It operates at speeds between 30-500 mm/s.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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