Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-30 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 SAIJ125X200-30
The AirTAC SAIJ125X200-30 is a double-acting ISO 15552 profile cylinder engineered with a rear stroke adjuster, allowing you to dial back the nominal 200 mm travel by up to 30 mm for a precise 170-200 mm usable window. Built with a robust 32 mm carbon steel rod and M27x2 thread, it delivers 6136 N of push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa. The extruded aluminum barrel features sensor grooves on both sides for straightforward switch integration.
This adjustable model uses a PT tapered port (G1/2) and omits the FB, CA, CB, and CR mountings, retaining the core Basic, FA, LB, TC, FTC, TCM1, and TCM2 interface set. The rear stopper strictly sets the travel end-point and works alongside the 40 mm air cushions to decelerate the load, but it does not function as a lock. For holding loads without live air pressure, consider the SAIL or BSAI variants.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-30 |
|---|---|
| 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 SAIJ125X200-30
| 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 SAIJ125X200-30 Is Used
Product Changeover
Dial in the 170-200 mm travel window during format size changes on packaging lines, using the rear screw to set new end positions rapidly without changing the cylinder.
Machine Setup
Fine-tune the final retract position during initial commissioning to achieve exact mechanical alignment, absorbing minor tolerances in the machine frame.
Variable End Stops
Provide adjustable physical stops for heavy-duty actuators requiring 6136 N of push force at 0.5 MPa, allowing flexible end-position limits on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X200-30 the Right Cylinder?
Selecting the SAIJ125X200-30 is ideal when you need to fine-tune the retract end position during machine commissioning or product changeover without adding external stops or swapping cylinders. If your application requires less force, stepping down to a 100 mm bore yields 3927 N at 0.5 MPa; stepping up to a 160 mm bore provides 10053 N. To replace an ISO 15552 cylinder, match the 125 mm bore, 200 mm stroke, 30 mm adjustment, PT port, and mounting style. Note that this variant uses a standard carbon steel rod and lacks a magnet for proximity sensing.
Because the nominal stroke is 200 mm, side-load risks are moderate, but the large 32 mm rod helps manage bending stress. Always guide the load externally for optimal bearing life. The rear adjuster allows precise mechanical tuning, but remember it only acts as a physical stop, meaning the cylinder cannot maintain position if air pressure is lost.
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 SAIJ125X200-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm, creating a usable travel window of 170 to 200 mm. This stopper sets the end position but does not lock the load without live air pressure.
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