Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-50
The AirTAC SAIJ125X700-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits precise end-position tuning. It provides a usable travel window of 650 to 700 mm, allowing you to dial back the 700 mm nominal stroke by up to 50 mm during commissioning. This bore delivers a robust 8590 N push force at 0.7 MPa, making it suitable for heavy-duty positioning tasks.
The extruded aluminum barrel incorporates sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic sensors. The 32 mm carbon steel piston rod utilizes an M27x2 thread, providing high rigidity, though the 700 mm length requires an external guide to prevent excessive side-loading. This adjustable variant uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125X700-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125X700-50 Is Used
Product Changeover Lines
Dial in the 650-700 mm travel window to accommodate different product lengths on a single conveyor without physically replacing the actuator.
Heavy Press Tuning
Fine-tune the end-stop position during machine setup to precisely set the pressing depth for 8590 N assembly operations.
Automated Material Handling
Adjust the retract distance on the fly for varying pallet sizes, relying on the rigid 32 mm rod to move heavy fixtures.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-50 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 5497 N at 0.7 MPa) lacks the necessary thrust, but a 160 mm bore (14074 N at 0.7 MPa) would be excessive. The adjustable stroke is selected over a fixed SAI cylinder when a product line requires variable end-stops for changeovers without physically swapping the cylinder or adding external stopper blocks.
When ordering, specify the 125 mm bore, 700 mm stroke, 50 mm adjustment, PT tapered port threads, and the standard carbon steel rod. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pneumatic pressure, consider the SAIL or BSAI series. Because the stroke is 700 mm, an external guide rail is recommended to manage side 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 SAIJ125X700-50 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. It can deliver up to 11045 N push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 700 mm nominal stroke by up to 50 mm, providing an effective travel window of 650 to 700 mm for fine-tuning at commissioning.
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