Airtac SAIJ50 Adjustable Cylinder SAIJ50X800-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50X800-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 800mm 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
- Stroke800 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 SAIJ50X800-20S
The AirTAC SAIJ50X800-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel window down to 780-800 mm during commissioning. It delivers 982 N of push force at 0.5 MPa and features a carbon steel piston rod with an M16x1.5 thread. This standard stroke length utilizes a 20 mm adjustment range to dial in exact end positions without adding external stops.
Because this SKU includes the -S magnet option, it supports AirTAC CMSE reed and DMSE solid-state electronic sensors housed in the dual-side barrel grooves. The rear adjuster functions strictly as a travel stop to set deceleration endpoints; it is not a lock, so the cylinder cannot hold a load without live air pressure. For applications requiring true load-holding, consider the SAIL or BSAI series instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50X800-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50X800-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 800 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 SAIJ50X800-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×800 | 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 SAIJ50X800-20S Is Used
Machine Changeover Setup
Dial in the 780-800 mm travel window during product size changes without physically swapping the cylinder or adding external mechanical stops.
Variable End-Position Trimming
Use the 20 mm rear adjuster to fine-tune the retract endpoint precisely, ensuring perfect alignment of parts on an automated line.
Sensor-Ready Positioning
Leverage the -S magnet option with DMSE solid-state sensors in the barrel grooves to confirm end-of-stroke positions at high operating speeds.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50X800-20S the Right Cylinder?
Select this 50 mm bore when a 982 N push force at 0.5 MPa (or 1374 N at 0.7 MPa) fits your dynamic requirements, and step down to a 40 mm bore (628 N at 0.5 MPa) if the load is lighter to save space. An adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers on a shared line. To replace an ISO 15552 cylinder, match the 50 mm bore, 800 mm stroke, 20 mm adjustment, PT tapered port, and the -S magnet requirement. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Given the 800 mm stroke, an external guide is recommended to prevent excessive rod side-loading.
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 SAIJ50X800-20S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 1374 N.
The rear adjuster screw lets you shorten the 800 mm nominal stroke by up to 20 mm, creating a 780-800 mm usable travel window. It acts only as a mechanical stop for end-position tuning and does not lock or hold the load without continuous air pressure.
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