Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X70-30S
The AirTAC Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X70-30S is a genuine double-acting profile-type standard air cylinder with a Ø50mm bore and 70mm 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
- Stroke70 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 SAUJ50X70-30S
The AirTAC SAUJ50X70-30S is a double-acting single-rod profile cylinder with an on-site extend stroke adjustment. An external stop screw lets you shorten the 70 mm nominal stroke by up to 30 mm, yielding a usable 40-70 mm working distance. This prevents buying a custom cylinder when you need to fine-tune machine positioning. The 1/4" port and M16x1.5 rod end match the standard 50 mm bore specification.
This profile barrel is notably shorter than an ISO 15552 cylinder of the same bore. It delivers 982 N push and 825 N pull at 0.5 MPa, peaking at 1767 N push at 0.9 MPa. For sizing, the safe working load is roughly 589 N, and it can vertically lift about 50 kg with a 2:1 margin. The -S suffix means a piston magnet is included for CMSG, DMSG, or EMSG sensors.
Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X70-30S Technical Specifications
| Model | Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X70-30S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø50 mm |
| Stroke | 70 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 SAUJ50X70-30S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×70 | 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 SAUJ50X70-30S Is Used
Gripper Jaw Actuation
Dialing in the exact open distance of a gripper is critical. The 30 mm stop screw window lets operators fine-tune jaw extension on-site to grasp varying part sizes without swapping cylinders.
Sealing Head Positioning
Heat sealers often need micro-adjustments for different package thicknesses. This cylinder allows operators to shorten the extend stroke by up to 30 mm to set the precise sealing crush distance.
Transfer Diverter Stops
When diverting mixed product lengths on a conveyor, the external stop screw provides a quick mechanical adjustment for the diverter fence position, ensuring items route correctly without reprogramming.
Is the Airtac SAUJ50 Adjustable Stroke Cylinder SAUJ50X70-30S the Right Cylinder?
Size this 50 mm bore against its neighbors: a 40 mm bore yields 628 N push at 0.5 MPa, while a 63 mm bore provides 1559 N. Choose the SAUJ over a fixed SAU when your assembly requires manual extend-length tuning without remachining hard stops. The 30 mm adjust window is ideal for minor mechanical timing shifts. Mounting options include Basic, FA flange, and LB foot, sharing compatibility with the AirTAC SC series. The included -S magnet supports CMSG/DMSG/EMSG switches. Because the 70 mm stroke is short, side-loading is minimal, but always guide the load externally for rigid stability.
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 SAUJ50X70-30S FAQ
This 50 mm bore cylinder features a 1/4" port and provides 982 N push / 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and 1767 N at 0.9 MPa. The 70 mm nominal extend stroke can be shortened by up to 30 mm via the external stop screw, giving a 40-70 mm usable range.
The external stop screw physically limits the piston's extend travel, setting the end position without altering internal cushions. The -S suffix indicates a built-in piston magnet for mounting CMSG, DMSG, or EMSG electronic switches. Note that the stop screw sets position only; it does not lock the load on air loss.
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