Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-100
The AirTAC SAIJ125X180-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a generous 6136 N push force at 0.5 MPa and features a 100 mm adjustment range, creating an 80-180 mm usable travel window for precise retract positioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This model uses a 32 mm carbon steel rod with an M27x2 thread, designed to handle substantial side loads. It supports speeds of 30-500 mm/s and includes variable air cushions at both ends to decelerate heavy moving masses. The rear adjuster acts strictly as a travel stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125X180-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125X180-100 Is Used
Product Changeover
Dial in the exact 80 to 180 mm retract distance on packaging lines when switching box sizes, eliminating the need for physical spacer swaps.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to perfectly align heavy clamping fixtures without machining new hard stops.
Variable End Stops
Adjust the rear travel limit on the fly to accommodate varying material thicknesses in automated pressing and forming operations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X180-100 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N at 0.5 MPa) lacks the thrust for your heavy fixture, but a 160 mm bore is unnecessarily large. The 100 mm adjustment window is perfect for machine setups requiring frequent product-size changeovers, allowing you to fine-tune the retract distance without swapping cylinders or adding external stops.
For load-holding without continuous air pressure, this cylinder is insufficient as the rear adjuster is a stop, not a lock; consider an AirTAC SAIL or BSAI series instead. To replace an ISO 15552 cylinder, match the 125 mm bore, 180 mm stroke, 100 mm adjust, PT tapered ports, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ125X180-100 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder delivers 6136 N of push force and 5734 N of pull force. It can reach up to 11045 N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the 180 mm nominal stroke by up to 100 mm, providing a usable travel window of 80 to 180 mm. It functions as a mechanical stop to set the end position and does not lock the load without air pressure.
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Standard models usually ship in 3-4 days.
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