Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20
The AirTAC SAIJ200X125-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers substantial thrust up to 15708N at 0.5 MPa and provides a usable travel window of 105 to 125 mm, allowing you to dial back the nominal 125 mm stroke by up to 20 mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE electronic switches.
This heavy-duty actuator features a 40 mm SUS420J2 stainless steel rod (code A) for superior corrosion resistance and a G3/4 PT tapered port. The rear adjustment screw acts purely as a mechanical stop to fine-tune the end position without swapping the cylinder, while the standard variable air cushions at both ends manage deceleration for the 30-500 mm/s speed range.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2 |
| 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, 50 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 (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SAIJ200 Adjustable Cylinder SAIJ200AX125-20 Is Used
Heavy Press Tuning
Dial in the exact 105-125 mm end-position for heavy stamping or pressing tasks without machining new hard stops.
Product Changeover
Quickly adjust the stroke by up to 20 mm on automated assembly lines when switching to a slightly different product variant.
High-Force Clamping
Secure large workpieces with up to 15708N of force at 0.5 MPa while fine-tuning the clamping depth at commissioning.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-20 the Right Cylinder?
Choose this 200 mm bore size when your application requires maximum push force, as it generates 15708N at 0.5 MPa or 21991N at 0.7 MPa. If your process needs less force, stepping down to a 160 mm bore yields 10053N at 0.5 MPa while saving footprint space. The adjustable stroke is ideal for product changeovers on a line, letting you shift the end-stop by 20 mm instantly rather than installing external physical stops.
Because the 125 mm stroke is under the 300 mm threshold, side-load risks are lower, but the 40 mm rod still handles high compressive loads well. Remember that the rear adjuster is a travel stop, not a locking device; it will not hold a load without live air pressure. For true fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. This model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ200 Adjustable Cylinder SAIJ200AX125-20 FAQ
At an operating pressure of 0.5 MPa, this 200 mm bore cylinder provides 15708N of push force and 15080N of pull force. At 0.7 MPa, the push force increases to 21991N.
The rear adjuster screw lets you mechanically shorten the effective travel from the nominal 125 mm down to 105 mm. This creates a 105-125 mm usable window for fine-tuning end positions at setup, but it functions only as a stop and does not lock the load without continuous air pressure.
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