Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40
The AirTAC Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40 is a genuine double-acting profile-type standard air cylinder with a Ø50mm bore and 140mm stroke, 1/4" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
- BoreØ50 mm
- Stroke140 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 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 SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40
The AirTAC SAUJ50X140-40 is a double-acting, single-rod profile cylinder with an on-site extend stroke trim of up to 40 mm. You set the external stop screw to shorten the working stroke from the 140 mm maximum down to 100 mm. It features a hard-anodized extruded aluminum barrel, making it shorter than an ISO 15552 cylinder of the same 50 mm bore. The 1/4" port and M16x1.5 rod thread handle the standard SAU force class.
This bore delivers 982 N push and 825 N pull at 0.5 MPa, peaking at 1767 N push at 0.9 MPa. A practical computed insight: the safe working load is roughly 589 N, and it can vertically lift about 50 kg with a 2:1 margin. The 21 mm adjustable air cushions decelerate the piston near stroke end. This non-magnet SKU cannot take a sensor.
Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40 Technical Specifications
| Model | Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40 |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø50 mm |
| Stroke | 140 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| 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, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
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 SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40
| SAU | Profile-type standard cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×140 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Where the Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40 Is Used
Press Fit Tuning
Dial in the exact 100 to 140 mm extend position for pressing bearings without machining custom spacers.
Variable Length Diverter
Adjust the stop screw on-site to change a package diverting arm length as box sizes change on the line.
Sealing Head Height
Trim the extend stroke by up to 40 mm to set precise sealing contact pressure for varied carton depths.
Is the Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40 the Right Cylinder?
Size this 50 mm bore against its neighbors: the 40 mm yields 628 N push while the 63 mm provides 1559 N, both at 0.5 MPa. Choose the SAUJ over a fixed SAU when you need final end-position tuning during machine commissioning rather than adding a separate external stop. The 40 mm adjust window lets you trim the 140 mm extend stroke down to 100 mm. Mount using Basic, FA flange, or LB foot styles, which share compatibility with the AirTAC SC series. Because this SKU lacks the -S magnet, it cannot accept CMSG or DMSG sensors. For this 140 mm stroke, guide external rods to manage side loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/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 — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X140-40 FAQ
At 0.5 MPa it provides 982 N push and 825 N pull. Push rises to 1374 N at 0.7 MPa and 1767 N at 0.9 MPa, with a theoretical max of 200 kgf at 1.0 MPa. The nominal 140 mm extend stroke can be shortened by up to 40 mm via the external stop screw, yielding a usable 100 to 140 mm window. It uses a 1/4" port.
No. This SKU lacks the -S magnet, so it cannot accept magnetic switches. A plain cylinder also does not hold a load on air loss; the piston drifts and the 21 mm air cushion only decelerates near the end. The stop screw sets the end position but is not a lock. Use an external rod lock or pilot-operated check valve for held loads.
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