Airtac SCJ80 Standard Cylinder SCJ80X140-30S
The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X140-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 140mm nominal stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Nominal stroke140 mm
- Stroke adjust-30 mm
- Port sizePT3/8
- Rod threadM20×1.5
- CushionAdjustable, 28 mm
About the Airtac SCJ80 Standard Cylinder SCJ80X140-30S
The SCJ80X140-30S is an 80 mm bore double-acting single-rod cylinder with a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end retraction. This model delivers a push force of 2513 N at 0.5 MPa, rising to 4523 N at 0.9 MPa, making it a robust mid-range actuator. The built-in magnet (-S suffix) allows direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for non-contact position feedback.
With a 25 mm diameter piston rod, PT3/8 ports, and a 28 mm air cushion, the SCJ80X140-30S is designed for applications where the final stroke length needs fine-tuning during commissioning or after tooling wear. The body length A(SCJ) is 239 mm, and the cylinder is rated for standard strokes up to 1500 mm. The operating speed range is 30-800 mm/s, with a pressure range of 0.15-1.0 MPa and a standard TPU seal for -20 to +70 C.
Airtac SCJ80 Standard Cylinder SCJ80X140-30S Technical Specifications
| Model | Airtac SCJ80 Standard Cylinder SCJ80X140-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 140 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ80 Standard Cylinder SCJ80X140-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×140 | Nominal (maximum) stroke length in mm. |
| -30 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ80 Standard Cylinder SCJ80X140-30S Is Used
Commissioning & Setup
The 30 mm adjusting screw lets technicians dial in the exact stroke end position on a new machine without swapping cylinders or machining custom stops, speeding up factory acceptance testing.
Product Changeover
On packaging or assembly lines, the stroke can be quickly shortened to accommodate a different product size or box format, reducing changeover time between batches.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke end can be periodically advanced to compensate for jaw or pad wear, maintaining consistent clamping force without replacing the actuator.
Is the Airtac SCJ80 Standard Cylinder SCJ80X140-30S the Right Cylinder?
For applications needing a similar adjustable stroke but with a smaller footprint, stepping down to the 63 mm bore SCJ63X140-30 provides 1559 N of push force at 0.5 MPa. If higher force is required, the 100 mm bore SCJ100X140-30 delivers 3927 N at the same pressure. A fixed-stroke SC80X140 is a simpler, lower-cost alternative if the stroke never needs field adjustment. This SCJ model is a direct dimensional replacement for another AirTAC SCJ80 cylinder with a 140 mm nominal stroke, 30 mm adjust range, PT3/8 ports, and a magnet sensor option. At 140 mm of stroke, rod bending from side loads is minimal, but for applications with significant off-axis forces, an external guide rail or a guided cylinder should be considered.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ80 Standard Cylinder SCJ80X140-30S FAQ
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. The theoretical maximum force at 1.0 MPa is 513 kgf.
It can replace an SC80X140 if you need the additional stroke-end adjustability. The SCJ body is slightly longer to house the rear adjusting screw, so ensure you have the extra clearance. The mounting, port size, and rod dimensions are identical.
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