Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 850mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke850 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100
The AirTAC SAIJ50X850-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 750-850 mm. Delivering 982 N of push force and 825 N of pull force at 0.5 MPa, it provides robust linear motion for demanding setups. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position monitoring.
This variant uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and features PT tapered port threads. The rear adjustment screw allows you to fine-tune the retract end position at commissioning without swapping out the entire cylinder or adding external stops. The adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | 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 SAIJ50 Adjustable Cylinder SAIJ50AX850-100 Is Used
Product Changeover
Quickly reposition the retract end-stop by up to 100 mm on a packaging line when switching to different package lengths, avoiding physical cylinder swaps.
End-Position Tuning
Fine-tune the final resting position during machine commissioning to achieve exact alignment without machining external stopper blocks.
Variable Diverter Stroke
Adjust the stroke window between 750 mm and 850 mm on a sorting conveyor to handle varying box sizes dynamically on the line.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX850-100 the Right Cylinder?
Choose this 50 mm bore when your application requires the 982 N push force at 0.5 MPa, which sits neatly between the 628 N of a 40 mm bore and the 1559 N of a 63 mm bore. An adjustable stroke is ideal for machine setups requiring product-size changeovers, letting you dial in the exact end position on the fly instead of relying on a fixed-stroke SAI cylinder. If your process needs to hold a load vertically without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is only a stop.
Because the 850 mm stroke is long and unsupported, you must use an external guide to prevent excessive side-loading on the M16x1.5 rod thread. For ISO 15552 mounting interchangeability, this model uses the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). The standard speed range for this bore is 30-800 mm/s.
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 SAIJ50 Adjustable Cylinder SAIJ50AX850-100 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers up to 200 kgf.
The rear adjuster screw allows you to shorten the nominal 850 mm stroke by up to 100 mm, creating a usable travel window of 750-850 mm. The adjuster acts as a mechanical stop to tune the end position and is not a locking mechanism.
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