Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30 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 SAIJ125AX700-30
The AirTAC SAIJ125X700-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of push force at 0.5 MPa and utilizes a 32mm SUS420J2 stainless steel rod with an M27x2 thread. By turning the rear screw, you can trim the 700mm nominal stroke back by up to 30mm, creating a precise 670-700mm usable travel window without swapping out the physical cylinder.
This bore size operates at 30-500mm/s and includes variable air cushions at both ends to decelerate heavy loads. The extruded aluminum barrel features sensor grooves on both sides for standard CMSE or DMSE switches. The rear stopper sets the end position, but it is a travel stop rather than a lock, meaning it will not hold the load safely without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30 |
|---|---|
| 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 SAIJ125AX700-30
| 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 SAIJ125AX700-30 Is Used
Product Size Changeover
Quickly dial in the 670-700mm stroke end-point during packaging line format changes without replacing hardware.
Machine Setup Calibration
Fine-tune the final retract position during commissioning to achieve exact mechanical alignment.
Heavy Material Handling
Leverage 6136N of push force to move heavy workpieces while relying on the air cushion for smooth deceleration.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-30 the Right Cylinder?
Choose this 125mm bore when a 100mm bore (providing 3927N push at 0.5MPa) lacks the necessary thrust, but a 160mm bore (10053N) would be excessive. The adjustable 670-700mm window is ideal for product changeovers where exact end-of-travel positioning must be dialed in on the fly, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. Because the 700mm stroke is long and the 32mm rod carries significant mass, an external guide is recommended to prevent side-loading damage. The PT tapered port and mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. For load-holding without live air, select a SAIL or BSAI cylinder instead.
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 SAIJ125AX700-30 FAQ
The rear adjuster screw allows you to shorten the 700mm nominal stroke by up to 30mm. This creates a usable travel window of 670-700mm, letting you set the exact retract end-position during commissioning without adding external stops.
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
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