The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X180-30S 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, 180mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X180-30S is an 80 mm bore double-acting single-rod air cylinder with a field-adjustable stroke end. A rear-cap screw lets you shorten the effective stroke by up to 30 mm without removing the cylinder, ideal for commissioning fine-tuning and format changeovers. It delivers 2513 N of push force at 0.5 MPa and uses a 25 mm diameter piston rod with PT3/8 ports.
This model includes a built-in magnet (-S suffix), allowing CMSG/DMSG/EMSG reed or solid-state sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The standard polyurethane seals work from -20 to +70 °C, and the adjustable air cushion decelerates the piston smoothly at each end of the 180 mm nominal stroke.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X180-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 180 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.
| 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×180 | 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.
The 30 mm rear adjustment screw allows technicians to quickly fine-tune the end-of-stroke position during initial machine setup without swapping cylinders or fabricating custom stops.
On packaging or sorting lines, operators can adjust the stroke end to accommodate different box sizes or product heights, reducing downtime between batches.
In clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for tooling or pad wear, maintaining consistent clamping force.
Choose the SCJ80X180-30S when you need to dial in a precise stroke end position on an 80 mm bore platform. If your force requirement drops, the 63 mm bore SCJ63 series provides 1559 N push at 0.5 MPa; for higher force, the 100 mm bore SCJ100 series delivers 3927 N. This adjustable-stroke model is the right pick over a fixed-stroke SC when the application requires periodic stroke-end adjustment, such as adapting to different workpiece thicknesses.
For replacement, match the 80 mm bore, 180 mm nominal stroke, 30 mm adjust range, PT3/8 ports, and the magnet-equipped (-S) configuration. If this 180 mm stroke is used with a heavy side load, consider an external guide rod assembly or a guided cylinder to protect the rod and bearing from bending moments.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The maximum push force at the 0.9 MPa operating limit is 4523 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the rod area.
Yes, if you need the 30 mm stroke-end adjustability. The SCJ80X180-30S matches the SC80's mounting footprint and force output but adds a rear adjusting screw. Ensure the 180 mm nominal stroke and the slightly longer body length fit your machine, and match the port size (PT3/8) and magnet option.
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