Airtac SAIJ50 Adjustable Cylinder SAIJ50BX800-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX800-20 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 SAIJ50BX800-20
The AirTAC SAIJ50X800-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 780 mm from the 800 mm nominal stroke. Delivering 982 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This adjustable-stroke design lets you dial in the exact retract end-position during commissioning or product changeovers without swapping the cylinder or bolting on external stops. The rear adjuster acts purely as a travel stop to set the end position, while the variable air cushions at both ends handle deceleration. It is not a locking device, so it will not hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX800-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX800-20 |
|---|---|
| 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 SAIJ50BX800-20
| 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 SAIJ50BX800-20 Is Used
Product Changeover
Dial in the exact 780 to 800 mm retract position during format size changes on a packaging line without adding physical spacer blocks.
Variable End Stop
Fine-tune the stopping point of a long-traverse conveyor diverter at commissioning to perfectly align with downstream machinery.
Machine Setup
Adjust the rear stopper screw to set precise end-of-stroke positions for a 982 N push assembly during initial equipment calibration.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX800-20 the Right Cylinder?
Choose this 50 mm bore when you need 982 N of thrust at 0.5 MPa and a highly specific long-stroke retract window, stepping up from a 40 mm bore that provides 628 N. An adjustable stroke is preferred over a fixed SAI cylinder when a machine requires frequent product-size changeovers, letting you trim the travel by up to 20 mm on the fly. To replace this unit with an ISO 15552 equivalent, match the 50 mm bore, 800 mm stroke, 20 mm adjustment, PT G1/4 port, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Because the stroke is 800 mm, the 16 mm rod and M12x1.25 rod thread will still experience deflection under side loads, so an external guide rail is required to prevent premature seal wear.
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 SAIJ50BX800-20 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 its maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjuster screw lets you shorten the effective stroke from 800 mm down to 780 mm. This creates a 780-800 mm travel window for fine-tuning the end position at commissioning without needing to swap the cylinder or add external stops.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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