Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30
The AirTAC SAIJ125X100-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 100 mm travel to a precise 70-100 mm usable window during commissioning. It delivers substantial thrust, providing 8590 N of push force at 0.7 MPa, making it suitable for heavy-duty positioning tasks.
This model features a 32 mm carbon steel rod and an M27x2 rod thread, which together provide high mechanical rigidity to withstand significant side loads. It uses PT tapered port threads and includes variable air cushions at both ends to manage deceleration, while the extruded aluminum barrel integrates dual sensor grooves for flexible switch placement.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125X100-30 Is Used
Variable End-Stop Positioning
Dial in the exact 70 to 100 mm travel distance required for pressing or locating heavy components during machine setup.
Product Changeover
Quickly adjust the retract end-position on a packaging line when switching to a different product size without changing hardware.
Heavy Assembly Station
Leverage the 8590 N push force at 0.7 MPa to move and seat substantial pallets or tooling fixtures accurately.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-30 the Right Cylinder?
Choose this adjustable SAIJ variant over a fixed-stroke SAI when your assembly requires variable end-stops or product-size changeovers without physically swapping the cylinder or adding external stopper blocks. If your application demands less force, stepping down to a 100 mm bore yields 5497 N at 0.7 MPa, whereas larger 160 mm bores are reserved for extreme loads up to 14074 N.
For an exact ISO 15552 replacement, match the 125 mm bore, 100 mm stroke, 30 mm adjustment range, PT port threads, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interface. Remember that the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for true fail-safe load holding, consider an external rod lock or the AirTAC SAIL or BSAI series.
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 SAIJ125X100-30 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder provides 8590 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective travel from the nominal 100 mm down to as little as 70 mm. This creates a 70-100 mm usable window for fine-tuning the end position at commissioning without replacing the cylinder.
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