Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 200mm 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
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75
The AirTAC SAIJ125X200-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N pull force at 0.5MPa and uses a PT tapered G1/2 port. By integrating an external adjusting screw, this model provides a usable travel window of 125 to 200mm, allowing you to dial back the nominal stroke by up to 75mm.
This 125mm bore actuator features a 32mm carbon steel rod and a 40mm cushion length at both ends. The rear stopper mechanism allows for precise end-position tuning during commissioning or product changeover without swapping the cylinder. It supports speeds of 30-500mm/s and uses an extruded aluminum barrel with dual sensor grooves, though position feedback requires adding the -S magnet option for CMSE or DMSE switches.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAIJ125X200-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SAIJ125X200-75 Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 125-200mm window during machine commissioning to perfect product handling without adding external physical stops.
Product Size Changeover
Quickly adapt automated line tooling for different part lengths by adjusting the rear screw up to 75mm, reducing downtime between production runs.
Heavy Payload Positioning
Leverage the 6136N pull force to move heavy assemblies into a precise working zone, relying on the 40mm air cushions to decelerate the mass smoothly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-75 the Right Cylinder?
Choose this 125mm bore size when an 80mm bore (providing 2268N pull at 0.5MPa) lacks the thrust for heavier payloads, but a 160mm bore is excessive. The 75mm adjustment range is ideal for machinery requiring variable end-stops across different product sizes. Unlike a fixed-stroke SAI cylinder, this adjustable variant eliminates the need for external stopper blocks during setup. For any load-holding requirements, note that the rear adjuster acts only as a travel stop and the air cushions provide deceleration, not a lock; you must maintain live air pressure or specify a SAIL or BSAI cylinder. As a dimensionally interchangeable ISO 15552 profile cylinder, it matches standard mounting interfaces using the Basic, FA, LB, TC, FTC, TCM1, and TCM2 set, omitting FB, CA, CB, and CR mounts.
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 SAIJ125X200-75 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of pull force and 8590N of push force. At the maximum 1.0MPa pressure, it delivers up to 1251kgf.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke from its 200mm nominal length down to 125mm. This creates a 75mm usable travel window for fine-tuning end positions without replacing the cylinder.
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