Airtac SAIJ50 Adjustable Cylinder SAIJ50AX550-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX550-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 550mm 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
- Stroke550 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 SAIJ50AX550-75S
The AirTAC SAIJ50X550-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a 982N push force at 0.5MPa and provides a usable travel window of 475-550mm, letting you trim up to 75mm off the 550mm nominal stroke during machine setup. The extruded aluminum barrel features sensor grooves on both sides for direct mounting of position switches.
This unit includes a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses PT tapered port threads. Because the stroke is 550mm, the 20mm piston rod and M16x1.5 thread require external guiding to prevent excessive side-loading on the seals. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX550-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX550-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 550 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 SAIJ50AX550-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×550 | 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 SAIJ50AX550-75S Is Used
Variable End-Position Tuning
Dial in the exact retract distance between 475 and 550mm during commissioning without adding external physical stops to the machine bed.
Product Size Changeover
Quickly adapt the stroke length on packaging lines when running different package lengths, using the 75mm adjustment range to accommodate new formats.
Long-Stroke Assembly Press
Utilize the 982N force over a 550mm travel to drive long-stroke assembly operations, fine-tuning the final lower position via the rear screw.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX550-75S the Right Cylinder?
Choose this 50mm bore if your application needs the 982N push force at 0.5MPa but requires an adjustable end-stop for product changeovers, avoiding the need to physically swap a fixed-stroke SAI cylinder. If your process demands less force, stepping down to a 40mm bore yields 628N; if you need more clamping power, stepping up to a 63mm bore provides 1559N.
When replacing an ISO 15552 cylinder, match the 50mm bore, 550mm stroke, 75mm adjustment range, PT port threads, and the -S magnet option. For any stroke of 300mm or more, such as this 550mm travel, always support the load with an external guide rail to prevent rod deflection. To hold a load securely without continuous air pressure, select a SAIL locking cylinder or an external rod lock, as the SAIJ adjuster only decelerates travel and cannot hold position.
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 SAIJ50AX550-75S FAQ
The rear of the cylinder features an external adjusting screw that acts as a mechanical stopper. It allows you to shorten the effective stroke by up to 75mm, giving you a usable travel window of 475-550mm without changing the cylinder's physical mounting.
At 0.5MPa operating pressure, it generates a push force of 982N and a pull force of 825N. The standard operating speed range for this bore size is 30-800mm/s, depending on the load and air flow.
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