Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50S
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50S 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 SAIJ200AX125-50S
The AirTAC SAIJ200X125-50-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications requiring exact end-position tuning. Equipped with a rear mechanical stopper, it allows you to dial back the 125 mm nominal stroke by up to 50 mm, creating a precise 75-125 mm usable travel window without swapping out the hardware. This cylinder delivers immense thrust, generating 15708 N of push force and 15080 N of pull force at 0.5 MPa.
Built for demanding environments, this variant features a SUS420J2 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback. It operates at 30-500 mm/s and includes adjustable air cushions at both ends to decelerate the massive 3204 kgf maximum load.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50S Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50S |
|---|---|
| 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 SAIJ200AX125-50S
| 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 SAIJ200AX125-50S Is Used
Variable End-Stop Forming
Dial in the exact 75-125 mm travel window during heavy-duty press or forming operations to accommodate different material thicknesses without changing the cylinder.
Product-Size Changeover
Rapidly adjust the rear stopper on a packaging line when switching between product sizes, using the 50 mm trim range to fine-tune the retraction endpoint.
Heavy Assembly Commissioning
Leverage the 15708 N push force at 0.5 MPa for large component assembly, using the rear screw to safely set the final end-position during machine commissioning.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX125-50S the Right Cylinder?
Selecting the SAIJ200X125-50-S is ideal when a machine setup requires a variable end-stop within a 75 to 125 mm window, saving the effort of physically exchanging cylinders during product changeovers. If an application requires less force, stepping down to a 160 mm bore yields 10053 N of push force at 0.5 MPa, which may be more efficient. Conversely, this 200 mm bore is the maximum standard SAIJ size available.
When replacing an ISO 15552 cylinder, match the 200 mm bore, 125 mm stroke, 50 mm adjustment range, PT port thread, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles. Because the nominal stroke is 125 mm, the 40 mm rod diameter handles side loads well, but long unsupported strokes still need an external guide. Note that the rear adjuster and air cushions only set the travel end and deceleration; they do not hold the load without live air. For true load-holding without pressure, use an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ200AX125-50S FAQ
At 0.5 MPa operating pressure, this 200 mm bore cylinder generates 15708 N of push force and 15080 N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 3204 kgf.
The rear adjusting screw acts as a mechanical stopper that allows you to shorten the 125 mm nominal stroke by up to 50 mm, providing a usable travel window of 75 to 125 mm. The adjuster sets the end position but does not lock the load without live air pressure.
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