Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-50
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 70mm 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
- Stroke70 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-50
The AirTAC SAIJ200X70-50 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty applications requiring exact end-position control. It delivers 21991N of push force at 0.7 MPa and features a rear stroke adjuster that allows you to trim the nominal 70mm stroke back by up to 50mm. This creates a highly versatile 20-70mm usable travel window, enabling precise calibration during machine setup or product changeovers without swapping out the entire actuator.
Equipped with a SUS420J2 stainless steel rod and PT tapered port threads, this 200mm bore unit is built for demanding environments. The robust 40mm rod diameter handles significant side loads, though external guides are recommended for optimal performance. It supports speeds of 30-500mm/s and utilizes a reduced mounting interface set (Basic, FA, LB, TC, FTC, TCM1, TCM2) to simplify installation.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-50 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 70 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 SAIJ200AX70-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×70 | 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 SAIJ200AX70-50 Is Used
Variable End-Stop Positioning
Dial in the exact retract distance within the 20-70mm window for heavy machinery that processes varying material thicknesses without needing physical spacer changes.
Heavy-Duty Machine Setup
Fine-tune the end-of-stroke position during initial commissioning to perfectly align high-force pressing or clamping actions, absorbing setup tolerances directly at the rear stopper.
Product Size Changeover
Quickly adapt the stroke length on production lines handling different product sizes, using the rear adjuster to shift the resting position by up to 50mm instantly.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX70-50 the Right Cylinder?
Select this 200mm bore cylinder when your application demands substantial thrust—up to 21991N at 0.7 MPa—and requires variable end-stop positioning. If your setup needs less force, stepping down to a 160mm bore provides 14074N at 0.5 MPa, which might be a more efficient choice. The SAIJ200X70-50 is chosen over a fixed-stroke SAI specifically for its 50mm adjustment range, allowing you to dial in the exact retract position on the fly.
When specifying this model, confirm your requirements for a 200mm bore, 70mm nominal stroke, 50mm adjustment, PT port threads, and SUS420J2 rod material. Note that the rear adjuster functions strictly as a travel stop and deceleration aid; it does not hold the load without live air pressure. For true load-holding without continuous air, consider an AirTAC 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 SAIJ200 Adjustable Cylinder SAIJ200AX70-50 FAQ
This 200mm bore cylinder provides a push force of 21991N and a pull force of 15080N at 0.7 MPa. At the maximum operating pressure of 1.0 MPa, it can deliver up to 3204 kgf.
The cylinder has a nominal 70mm stroke, but the external rear adjusting screw allows you to shorten the effective travel by up to 50mm. This creates a usable 20-70mm travel window, letting you fine-tune the end position without adding external stops.
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