Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-40
The AirTAC Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø200mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2
- CushionAdjustable, 50 mm
About the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-40
The AirTAC SAIJ200X850-40 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty operations requiring exact end-position tuning. It provides a nominal 850mm stroke with a rear mechanical stopper that allows you to dial back the travel by up to 40mm, creating an 810-850mm adjustable window. This built-in adjustability simplifies commissioning and product changeovers by eliminating the need to physically swap cylinders or bolt on external stops. Delivering 15708N of push force at 0.5 MPa, it is built for massive loads.
This unit features a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. Because the 850mm stroke exceeds the standard 1500mm maximum for this bore, it is manufactured as a made-to-order non-standard unit.
Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-40 Technical Specifications
| Model | Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø200 mm |
| Stroke | 850 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 SAIJ200AX850-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 200 | Bore size in mm. |
| ×850 | 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 SAIJ200AX850-40 Is Used
Heavy Press Tuning
Dial in the exact 810-850mm retraction point on a large metal-forming press during setup, allowing precise bottoming-out adjustments without replacing the actuator.
Pallet Positioning
Adjust the end-stop on a heavy-duty conveyor diverter to accommodate different pallet lengths during production line changeovers.
Large Mold Handling
Fine-tune the retraction stroke when extracting large industrial molds, ensuring the tooling clears the machine bed by a precise, adjustable margin.
Is the Airtac SAIJ200 Adjustable Cylinder SAIJ200AX850-40 the Right Cylinder?
Selecting this 200mm bore cylinder is appropriate when an application demands extreme thrust, such as 15708N push and 15080N pull at 0.5 MPa. If an installation can operate efficiently with lower forces, stepping down to a 160mm bore yields 10053N of push force, saving valuable space and air consumption. You should choose the adjustable SAIJ over a fixed SAI when a machine setup requires a variable end-stop to perfect the retraction point without machining components. For exact ISO 15552 interchangeability, match the 200mm bore, 850mm stroke, 40mm adjustment, PT port thread, and required mounting accessories.
With an 850mm stroke, the 40mm diameter rod and M36x2 thread provide substantial rigidity, but long unsupported strokes inherently generate high bending moments. An external guide rail is strongly recommended to prevent excessive side-load wear. Furthermore, the rear adjuster functions strictly as a travel stop, not a locking mechanism. The cylinder cannot hold a load without live air pressure; for true load-holding, integrate an external rod lock or specify an AirTAC BSAI clamp-lock cylinder.
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 SAIJ200AX850-40 FAQ
At 0.5 MPa, this 200mm bore cylinder provides 15708N of push force and 15080N of pull force. The maximum operating pressure is 1.0 MPa, yielding up to 28274N of push force. The operational speed range is 30-500 mm/s.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective stroke by up to 40mm, providing a usable travel window of 810-850mm. This allows you to fine-tune the end position at commissioning without adding external stops, though the adjuster only sets the travel limit and does not lock the load without air pressure.
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